10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2016

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission File Number 1-8957

ALASKA AIR GROUP, INC.

Delaware	91-1292054
(State of Incorporation)	(I.R.S. Employer Identification No.)

19300 International Boulevard, Seattle, Washington 98188

Telephone: (206) 392-5040

Securities registered pursuant to Section 12(b) of the Act:

Common Stock, $0.01 Par Value New York Stock Exchange

 Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yesx   No  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes ¨      No  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yesx  No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definitions of “large accelerated filer”, "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act: 

Large accelerated filerx  Accelerated filer  ¨     Non-accelerated filer   ¨  Smaller reporting company   ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act.): Yes ¨ No x

As of February 22, 2017, shares of common stock outstanding totaled 123,468,367. The aggregate market value of the shares of common stock of Alaska Air Group, Inc. held by nonaffiliates on June 30, 2016, was approximately $7.1 billion (based on the closing price of $58.29 per share on the New York Stock Exchange on that date). 

DOCUMENTS INCORPORATED BY REFERENCE

Portions of Definitive Proxy Statement relating to 2017 Annual Meeting of Shareholders are incorporated by reference in Part III.

ALASKA AIR GROUP, INC.

ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2016

TABLE OF CONTENTS

PART I		4
ITEM 1.	OUR BUSINESS	4
ITEM 1A.	RISK FACTORS	18
ITEM 1B.	UNRESOLVED STAFF COMMENTS	26
ITEM 2.	PROPERTIES	26
ITEM 3.	LEGAL PROCEEDINGS	27
ITEM 4.	MINE SAFETY DISCLOSURES	28
PART II		28
ITEM 5.	MARKET FOR THE REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS, AND ISSUER PURCHASES OF EQUITY SECURITIES	28
ITEM 6.	SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA	30
ITEM 7.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	32
ITEM 7A.	QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK	55
ITEM 8.	CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA	56
ITEM 9.	CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE	91
ITEM 9A.	CONTROLS AND PROCEDURES	91
ITEM 9B.	OTHER INFORMATION	94
PART III		94
ITEM 10.	DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE	94
ITEM 11.	EXECUTIVE COMPENSATION	94
ITEM 12.	SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT, AND RELATED STOCKHOLDER MATTERS	94
ITEM 13.	CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE	95
ITEM 14.	PRINCIPAL ACCOUNTANT FEES AND SERVICES	95
PART IV		95
ITEM 15.	EXHIBITS	95
	SIGNATURES	96

As used in this Form 10-K, the terms “Air Group,” the "Company," “our,” “we” and "us," refer to Alaska Air Group, Inc. and its subsidiaries, unless the context indicates otherwise. Alaska Airlines, Inc., Virgin America Inc. and Horizon Air Industries, Inc. are referred to as “Alaska,” "Virgin America" and “Horizon,” respectively, and together as our “airlines.”

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

In addition to historical information, this Form 10-K contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. Forward-looking statements are those that predict or describe future events or trends and that do not relate solely to historical matters. You can generally identify forward-looking statements as statements containing the words “believe,” “expect,” “will,” “anticipate,” “intend,” “estimate,” “project,” “assume” or other similar expressions, although not all forward-looking statements contain these identifying words. Forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from historical experience or the Company’s present expectations.

You should not place undue reliance on our forward-looking statements because the matters they describe are subject to known and unknown risks, uncertainties and other unpredictable factors, many of which are beyond our control.

Our forward-looking statements are based on the information currently available to us and speak only as of the date on which this report was filed with the SEC. We expressly disclaim any obligation to issue any updates or revisions to our forward-looking statements, even if subsequent events cause our expectations to change regarding the matters discussed in those statements. Over time, our actual results, performance or achievements will likely differ from the anticipated results, performance or achievements that are expressed or implied by our forward-looking statements, and such differences might be significant and materially adverse to our shareholders. For a discussion of these and other risk factors in this Form 10-K, see “Item 1A: Risk Factors.” Please consider our forward-looking statements in light of those risks as you read this report.

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PART I

ITEM 1. OUR BUSINESS

Air Group operates Alaska, Virgin America and Horizon Air. We completed the acquisition of Virgin America on December 14, 2016, at which time Virgin America became our wholly-owned subsidiary. Together with our regional partner airlines, we fly to 118 destinations with nearly 1,200 daily departures through our expansive network across the United States, Mexico, Canada, Costa Rica and Cuba. With our global airline partners, we can provide our guests with a virtual network of more than 900 destinations worldwide. During 2016, we carried an all-time high 34 million guests and earned adjusted net income of $911 million, which includes operating and financial results for Virgin America for the period December 14, 2016 through December 31, 2016, and excludes pretax special items and merger-related costs of $117 million.

Our acquisition of Virgin America positions us as the fifth largest airline in the U.S., with an unparalleled ability to serve West Coast travelers. Virgin America provides a platform for growth of our low-fare, premium product providing a powerful West Coast network for our guests as well as enhanced international partnerships. Additionally, Virgin America provides an opportunity to grow and improve our loyalty program while gaining access to constrained gates, particularly on the East Coast. The combined company now provides more seats from the West Coast than any other carrier, allowing us to serve our guests better.

Our mission is "creating an airline people love." The "ing" is to recognize we are never done—we are continually working to get better. We believe our success depends on our ability to provide safe air transportation, develop relationships with guests by providing exceptional customer service and low fares, and maintain a low cost structure to compete effectively. It is important to us that we achieve our objective as a socially responsible company that values not just our performance, but also our people, our community and our environment.

While aircraft and technology enable us to provide air transportation, we recognize this is fundamentally a people business. Our employees maintain and strengthen our relationships with guests, and our success depends on our employees working together to successfully execute our strategy. In 2016, Alaska was once again named one of America's Best Employers by Forbes Magazine. We know that engaged employees provide excellent service. In that vein, in 2016, Alaska ranked highest in customer satisfaction among traditional network carriers by J.D. Power and Associates for the ninth year in a row and Virgin America was recognized for excellent service by Conde Nast Traveler and Travel + Leisure magazine also for the ninth year in a row. Customer service matters, and we believe the combination of our airlines will only enhance the experience for our guests.

Operationally, Alaska has held the No. 1 spot in the Wall Street Journal's "Middle Seat" scorecard for U.S. airlines for four consecutive years. We have been the leader in the industry for on-time performance among major airlines for the past seven years. For achieving safety, customer service, operational and financial goals, we rewarded our employees with a record $127 million in incentive pay during 2016. Including incentives earned during the year prior to the acquisition by Virgin America employees, the total is $159 million.

In support of the communities that we serve, we strive to be an industry leader in environmental and community stewardship. In 2016, we improved fuel efficiency by 1.4% from the prior year, as measured by available seat miles flown per gallon. We also flew the first two commercial flights using sustainable alcohol-to-jet biofuel made from U.S. grown corn and alternative jet fuel made from forest residuals, highlighting our commitment to environmental stewardship. Our combined fleet is one of the youngest, most fuel-efficient fleets in North America and we look forward to further enhancements in this area. Air Group donated $13 million to over 1,300 charitable organizations and our employees volunteered more than 27,000 hours of community service. Virgin America has also been active in community service and charitable giving. Our efforts focus on youth and education, medical research and transportation and community outreach. One of our leadership principals is to "give back" and we are proud of the efforts and volunteerism of our employees across the system.

We earned record financial results in 2016, marking our 13th consecutive annual profit on an adjusted basis. We achieved an after-tax return on invested capital of 21.3%, well above our weighted average cost of capital. Although we incurred a significant amount of new debt in 2016 to fund the Virgin America acquisition, our liquidity and capital position still remain strong and are among those of high-quality industrial companies. Due to our strong financial health and outlook, we are one of only three U.S. airlines with investment grade credit ratings. With the cash generated by the continued success we have had in the past decade, we have been able to invest in our business to achieve profitable growth and to enhance the customer experience. Most recently, we launched our Premium Class service on our Boeing 737 aircraft, which includes more legroom, early boarding, free cocktails and premium snacks.

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As we look to the future, we will build on our success by executing our strategic plan in the following areas:

Be Safe and On time

We have an unwavering commitment to run a safe and compliant operation, and we will not compromise this commitment in the pursuit of other initiatives. Alaska and Horizon were the first U.S. major airlines to receive Federal Aviation Administration ("FAA") validation and acceptance of our Safety Management System ("SMS") in the third quarter of 2016. SMS helps identify and manage risk and builds a sustainable culture of safety for Air Group employees. We have an initiative to add Virgin America to the SMS program in 2017. Once again, for 2016, 100% of our Alaska and Horizon aircraft technicians completed the requirements for the FAA's "Diamond Certificate of Excellence" award. This is the 15th consecutive year Alaska Airlines has received the award and the 15th time in the last 17 years for Horizon. We also believe that maintaining safe and compliant operations, through adherence to well defined processes and ensuring every Air Group employee is aware of their individual contribution to our operation, is critical to ensuring on-time performance. The rigor we apply to running a safe and compliant operation has resulted in Alaska being named the No. 1 on-time carrier in North America for the seventh year in a row by FlightStats.

Focus on People

Our success depends on our people. Higher employee engagement drives higher productivity, superior execution and better customer service, which is why we listen to our employees for feedback in shaping our strategy. Employee engagement scores from our annual employee survey are at historical highs. We have designed customer-service workshops and leadership training that cover virtually all employees and do these on an ongoing basis. As we integrate Alaska and Virgin America, in January 2017 we rolled out "Momentum" training for all Virgin America employees to help bridge the two airlines and blend our cultures. For our Horizon employees, we are conducting "QX Factor," a program with the goal of improving culture, engagement and communication.

We understand that aligning our employees' goals with Air Group's goals is important in achieving success. The majority of Air Group employees, including Virgin America employees starting in 2017, participate in our Performance-Based Pay ("PBP") and Operational Performance Rewards ("OPR") programs, which encourage employees to work together to achieve metrics related to safety, profitability, on-time performance, low costs and customer loyalty and satisfaction. Over the last five years, our incentive programs have paid out on average, over 8.7% of annual pay, or more than one month's pay, for most employees.

Build a deep emotional connection for our brand

We want to be recognized as the preferred airline to fly for people living on the West Coast. In January 2016, we introduced a bold new brand expression, including an updated identity, livery, and look and feel for our digital and physical experiences. In January 2017, subsequent to year end, we were the first airline to launch Free Chat—a feature that allows our guests to text for free in-flight. We believe there is an opportunity to deepen the emotional connection with our guests as we continue to expand and grow. Our updated brand expression draws upon our rich heritage while infusing it with additional warmth and energy to better reflect how guests feel about our brand and the great service that we pride ourselves in delivering.

We continue to invest in a better customer experience. Onboard, guests will continue to enjoy more of what they love with free and premium entertainment direct to their devices, Pacific Northwest-inspired food and beverages, custom leather seats with power outlets at every seat and larger overhead bins for carry-on bags. As mentioned previously, we have also recently launched our new Premium Class section in the main cabin with increased legroom and other amenities and improved our First Class with five additional inches of leg room.

Defend and grow our customer base

The merger with Virgin America provides an amazing opportunity for our new Alaska Air Group. We have a network that provides unparalleled utility and options for our guests living on the West Coast. Competition in our markets is fierce and we know we must defend our customer base as we use our combined network as an opportunity to grow that base. We will be introducing new guests to our award-winning service, Mileage Plan™ program, and affinity credit card as we grow our network. Guests from our airlines already benefit from codeshare and reciprocal frequent flyer benefits, including earning and redeeming rewards on both carriers. Elite members of the Virgin America Elevate® program and Alaska's Mileage Plan™ also receive priority boarding on both carriers. We work hard to ensure our guests have a great experience on our airlines and are provided an exceptional product at a low fare.

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Win with low costs and low fares

We believe that our low-fare model gives us a competitive advantage by providing value to and building trust with our guests. We also know that, in order to provide low fares in our growing network, while returning value to our shareholders, it is imperative for us to maintain a competitive cost structure. In 2016, we lowered our unit costs, excluding fuel, by 0.8% on a consolidated basis, representing the seventh consecutive year of annual reduction. We achieved this through a continued focus on productivity, cost management, and by leveraging capacity growth. We increased employee productivity in 2016 and will continue to focus on that metric as we grow. We also manage fuel costs by flying larger, more fuel-efficient aircraft, which have increased our fuel efficiency as measured by available seat miles flown per gallon by 7.0% over the last five years. As we integrate Virgin America into our operations, we are committed to achieving our stated cost and revenue synergy goals. It is critical that we achieve these goals in order to continue our cost reduction efforts.

During fiscal 2016, we added 17 new markets to the combined network. For 2017, we plan to grow our system-wide capacity approximately 8.5% as compared to the full year 2016 combined capacity of Air Group and Virgin America.

AIR GROUP

Alaska Air Group is a Delaware corporation incorporated in 1985 and the holding company of Alaska, Virgin America, Horizon and other business units. Although Alaska, Virgin America and Horizon operate as airlines, the business plans, competition and economic risks differ substantially for Horizon in comparison to Alaska and Virgin America. Alaska Airlines is an Alaska corporation that was organized in 1932 and incorporated in 1937. Virgin America is a California corporation that was incorporated in 2004 and acquired by Air Group on December 14, 2016. Horizon is a Washington corporation that began service and was incorporated in 1981. It was acquired by Air Group in 1986. Alaska and Virgin America operate fleets of narrowbody passenger jets. Together, the operations of Alaska and Virgin America are referred to as "mainline" operations. Alaska also contracts with Horizon, SkyWest Airlines, Inc. ("SkyWest") and Peninsula Airways, Inc. ("PenAir") for regional capacity such that Alaska receives all passenger revenue from those flights. Horizon currently operates a fleet of turboprop aircraft and sells all of its capacity to Alaska pursuant to a capacity purchase agreement ("CPA"). In 2017, Horizon will begin operating E175 regional jets. The majority of our revenues are generated by transporting passengers. The percentage of revenues by category is as follows:

	2016(a)		2015		2014		2013		2012
Mainline passenger revenue	69	%	70	%	70	%	70	%	71	%
Regional passenger revenue	15	%	15	%	15	%	16	%	16	%
Other revenue	14	%	13	%	13	%	12	%	11	%
Freight and Mail revenue	2	%	2	%	2	%	2	%	2	%
Total	100	%	100	%	100	%	100	%	100	%

(a) Includes information for Virgin America for the period December 14, 2016 through December 31, 2016.

We attempt to deploy aircraft into the network in ways that best optimize our revenues and profitability and reduce our seasonality.

The percentage of our capacity by region is as follows:

	2016 (a)		2015		2014		2013		2012
West Coast	34	%	36	%	36	%	34	%	35	%
Transcon/midcon	29	%	24	%	22	%	22	%	19	%
Hawaii and Costa Rica	17	%	18	%	18	%	19	%	20	%
Alaska	14	%	15	%	15	%	16	%	17	%
Mexico	5	%	6	%	6	%	7	%	7	%
Canada	1	%	1	%	3	%	2	%	2	%
Total	100	%	100	%	100	%	100	%	100	%

(a) Includes information for Virgin America for the period December 14, 2016 through December 31, 2016.

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MAINLINE

The mainline operations include Boeing 737 ("B737") and Airbus family ("A319" and "A320") jet service offered by Alaska and Virgin America. We offer extensive passenger service from the western U.S. throughout the contiguous United States, Alaska, Hawaii, Canada, Mexico, Costa Rica and Cuba. Our largest concentration of departures is in Seattle. We also offer cargo service throughout our network and have dedicated cargo aircraft that operate primarily to and within the state of Alaska.

In 2016, we carried 25 million revenue passengers in our mainline operations. At December 31, 2016, our mainline operating fleet consisted of 155 B737 jet aircraft and 63 Airbus A320 family jet aircraft compared to 147 B737 aircraft as of December 31, 2015.

The percentage of mainline passenger capacity by region and average stage length is presented below:

	2016 (a)		2015		2014		2013		2012
West Coast	30	%	31	%	31	%	28	%	29	%
Transcon/midcon	30	%	27	%	25	%	25	%	22	%
Hawaii	19	%	20	%	20	%	21	%	22	%
Alaska	15	%	16	%	16	%	18	%	18	%
Mexico	6	%	6	%	7	%	7	%	8	%
Canada	—	%	—	%	1	%	1	%	1	%
Total	100	%	100	%	100	%	100	%	100	%
Average Stage Length	1,225		1,195		1,182		1,177		1,161

(a) Includes information for Virgin America for the period December 14, 2016 through December 31, 2016.

REGIONAL

Our regional operations consist of flights operated by Horizon, SkyWest and PenAir. In 2016, our regional operations carried approximately 9 million revenue passengers, primarily in the states of Washington, Oregon, Idaho and California. Horizon is the largest regional airline in the Pacific Northwest and carries about 83% of Air Group's regional revenue passengers.

Based on 2016 passenger enplanements on regional aircraft, our leading airports are Seattle and Portland. At December 31, 2016, Horizon’s operating fleet consisted of 52 Bombardier Q400 turboprop aircraft. The regional fleet operated by SkyWest consisted of 15 E175 aircraft.

The percentage of regional passenger capacity by region and average stage length is presented below:

	2016		2015		2014		2013		2012
West Coast	60	%	62	%	66	%	66	%	68	%
Pacific Northwest	16	%	19	%	19	%	21	%	20	%
Canada	5	%	7	%	8	%	9	%	9	%
Alaska	4	%	5	%	4	%	2	%	2	%
Midcon	15	%	6	%	2	%	1	%	—	%
Mexico	—	%	1	%	1	%	1	%	1	%
Total	100	%	100	%	100	%	100	%	100	%
Average Stage Length	381		348		339		329		332

FREQUENT FLYER PROGRAMS

We currently maintain two frequent flyer plans: the Alaska Airlines Mileage Plan™ and the Virgin America Elevate®.

Mileage Plan™ provides a comprehensive suite of frequent flyer benefits. Miles can be earned by flying on Alaska or on one of our 24 airline partners, by using the Alaska Airlines credit card, or through other non-airline partners. Our extensive list of airline partners includes carriers associated with each of the three major global alliances, making it easier for our members to earn miles and reach elite status in our frequent flyer programs and have access to a large network of over 900 worldwide travel

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destinations. Further, members can receive 30,000 bonus miles upon signing up for the Alaska Airlines Visa Signature card and earn triple miles on purchases made on Alaska flights or on alaskaair.com. Alaska Airlines Visa Signature cardholders also receive an annual companion ticket that allows members to purchase an additional ticket for $99 plus taxes, with no restrictions or black-out dates, and a free first checked bag for up to seven people traveling in the same itinerary. Earned miles can be redeemed for flights on our airlines or on any of our partner airlines, or for upgrades to First Class and Premium Class on Alaska Airlines. All of these benefits give our Mileage Plan™ members more value for their travel on Alaska, leading us to receive the highest ranking in customer satisfaction amongst traditional carriers in North America from J.D. Power and Associates for the last nine consecutive years.

Mileage Plan™ revenues represented approximately 12% of Air Group's total revenues in 2016. Mileage Plan™ helps drive revenue growth by attracting new customers and building customer loyalty through the benefits that we provide.

The Elevate® program allows guests to earn points for purchasing travel that are redeemable for travel awards throughout our network and the networks of Virgin America's airline partners. Elevate® members have been introduced to the Mileage Plan™ program and, over time, the two programs will become one. Currently, our guests from both airlines enjoy codeshare and reciprocal frequent flyer benefits, including earning and redeeming rewards on both carriers. Elite members of each frequent flyer program receive priority boarding on both carriers.

AGREEMENTS WITH OTHER AIRLINES

Our agreements fall into three different categories: Frequent Flyer, Codeshare and Interline agreements. Frequent Flyer agreements offer mileage credits and redemptions for our Mileage Plan™ and Elevate® members. Alaska offers one of the most comprehensive frequent flyer programs for our Mileage Plan™ members through our frequent flyer partnerships with 24 domestic and international carriers.

Codeshare agreements allow one or more marketing carriers to sell seats on a single operating carrier that services passengers under multiple flight numbers. The sale of codeshare seats can vary depending on the sale arrangement. For example, in a free-sale arrangement, the marketing carrier sells the operating carrier's inventory without any restriction; whereas in a block space arrangement, a fixed amount of seats is sold to the marketing carrier by the operating carrier. The interchangeability of the flight code between carriers provides a greater selection of flights for customers, along with increased flexibility for mileage accrual and redemption.

Interline agreements allow airlines to jointly offer a competitive, single-fare itinerary to customers traveling via multiple carriers to a final destination. An interline itinerary offered by one airline may not necessarily be offered by the other, and the fares collected from passengers are prorated and distributed to interline partners according to preexisting agreements between the carriers. Frequent flyer, codeshare and interline agreements help increase our traffic and revenue by providing more route choices to our guests.

We have marketing alliances with a number of airlines that provide frequent flyer and codesharing opportunities. Alliances are an important part of our strategy and enhance our revenues by:

• offering our guests more travel destinations and better mileage credit/redemption opportunities, including elite qualifying miles on all of our major U.S. and international airline partners;

• giving our frequent flyer program a competitive advantage because of our partnership with carriers from all three of the major global alliances;

• giving us access to more connecting traffic from other airlines; and

• providing members of our alliance partners’ frequent flyer programs an opportunity to travel on Alaska, Virgin America and our regional affiliates while earning mileage credit in our partners’ programs.

Most of our codeshare relationships are free-sale codeshares, where the marketing carrier sells seats on the operating carrier’s flights from the operating carrier’s inventory, but takes no inventory risk. Our marketing agreements have various termination dates, and one or more may be in the process of renegotiation at any time.

On December 19, 2016 we announced the termination of our codeshare agreement with Delta Air Lines ("Delta"), effective April 30, 2017. Our interline agreement with Delta will continue. We expect the impact to our guests in 2017 to be minimal due to growth in Alaska's own network, in large part from our acquisition of Virgin America, and our ability to codeshare with other

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partners. We also believe the financial exposure from the termination of our codeshare agreement with Delta will be immaterial to our financial results in 2017.

The comprehensive summary of Alaska, Horizon and SkyWest alliances with other airlines is as follows:

		Codeshare
	Frequent Flyer Agreement	Alaska Flight # on Flights Operated by Other Airline	Other Airline Flight # on Flights Operated by Alaska / Horizon / SkyWest
Major U.S. or International Airlines
Aeromexico	Yes	No	Yes
American Airlines	Yes	Yes	Yes
Air France	Yes	No	Yes
British Airways	Yes	No	Yes
Cathay Pacific Airways	Yes	No	Yes
Delta Air Lines(b)	Yes(b)	Yes(b)	Yes(b)
Emirates	Yes	No	Yes
Icelandair	Yes	No	Yes
Hainan Airlines	Yes	No	No
KLM	Yes	No	Yes
Korean Air	Yes	No	Yes
LAN S.A.	Yes	No	Yes
Fiji Airways(a)	Yes	No	Yes
Qantas	Yes	No	Yes
Regional Airlines
Rav'n Alaska	Yes	Yes	No
PenAir(a)	Yes	Yes	No

(a) These airlines do not have their own frequent flyer program. However, Alaska's Mileage Plan^TM members can earn and redeem miles on these airlines' route systems.

(b) Codeshare and frequent flyer agreements with Delta terminate on April 30, 2017.

The comprehensive summary of Virgin America alliances with other airlines is as follows:

		Codeshare
	Frequent Flyer Agreement	Virgin America Flight # on Flights Operated by Other Airline	Other Airline Flight # on Flights Operated by Virgin America
Major U.S. or International Airlines
China Airlines	No	No	Yes
China Eastern	No	No	Yes
China Southern	No	No	Yes
Emirates	Yes	No	No
Hawaiian Airlines	Yes(a)	No	Yes
Singapore Airlines	Yes	No	Yes
Virgin Australia	Yes	No	Yes

(a) Ability to redeem award flights only (no mileage accrual on Hawaiian Airlines flight segments).

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The following is the financial impact of our marketing alliances:

	2016(a)	2015	2014	2013	2012
Air Group Marketed Revenues	92%	90%	91%	90%	90%
Codeshare Agreements:
American Airlines	3%	4%	3%	2%	3%
Delta Air Lines	1%	2%	2%	4%	3%
Others	1%	1%	1%	1%	1%
Interline Agreements:
Domestic Interline	2%	2%	2%	2%	2%
International Interline	1%	1%	1%	1%	1%
Total Operating Revenue	100%	100%	100%	100%	100%

(a) Includes information for Virgin America for the period December 14, 2016 through December 31, 2016.

OTHER REVENUE

Other revenue consists of freight and mail, certain frequent flyer and ancillary revenue. While some of our product features are included in our base pricing, we have unbundled certain ancillary features that our guests separately value. Major ancillary revenue products include checked bag fees, change fees and lounge memberships. We also promote and sell products in-flight to enhance the guest experience, including our Tom Douglas signature meals, snacks, alcoholic beverages, in-flight entertainment and Wi-Fi. Total other revenue, excluding frequent flyer program revenue, represents about 7% of our total revenues.

GENERAL

The airline industry is highly competitive and subject to various uncertainties, including economic conditions, volatile fuel prices, industry instability, new competition, a largely unionized work force, the need to finance large capital expenditures and the related availability of capital, government regulation—including taxes and fees and potential aircraft incidents. Airlines have high fixed costs, primarily for wages, aircraft fuel, aircraft ownership and facilities rents. Because expenses of a flight do not vary significantly based on the number of passengers carried, a relatively small change in the number of passengers or in pricing has a disproportionate effect on an airline’s operating and financial results. In other words, a minor shortfall in expected revenue levels could cause a disproportionately negative impact on our operating and financial results. Passenger demand and ticket prices are, to a large measure, influenced by the general state of the economy, current global economic and political events, and total available airline seat capacity.

In 2016, the airline industry reported historically high revenues and profits, as the global economy continued to recover and oil prices remained low. As the industry strengthens, airlines are now making significant investments in airports, in new planes and in new services to differentiate their customer service offering. Thus, the level of competition is expected to increase.

FUEL

Our business and financial results are highly affected by the price and the availability of aircraft fuel. The cost of aircraft fuel is volatile and outside of our control, and it can have a significant and immediate impact on our operating results. Over the past five years, aircraft fuel expense ranged from 18% to 35% of operating expenses. Fuel prices are impacted by changes in both the price of crude oil and refining margins and can vary by region in the U.S.

The prices we have paid for crude oil on an average annual basis for the past five years have ranged from a low of $43 per barrel in 2016 to a high of $98 in 2013. For us, a $1 per barrel change in the price of oil equates to approximately $18 million of fuel cost annually. Said another way, a one-cent change in our fuel price per gallon will impact our expected annual fuel cost by approximately $7 million per year.

Refining margins, which represent the price of refining crude oil into aircraft fuel, are a smaller portion of the overall price of jet fuel but also contributed to the price volatility in recent years. Average annual refining margin prices have fluctuated between $13 per barrel and $36 per barrel in the last five years, and averaged $13 in 2016.

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Generally, West Coast jet fuel prices are somewhat higher and more volatile than prices in the Gulf Coast or on the East Coast. Our average raw fuel cost per gallon decreased19% in 2016, 39% in 2015 and 6% in 2014.

The percentages of our aircraft fuel expense by crude oil and refining margins, as well as the percentage of our aircraft fuel expense of operating expenses are as follows:

	2016 (a)		2015		2014		2013		2012
Crude oil	69	%	62	%	72	%	71	%	65	%
Refining margins	20	%	26	%	18	%	19	%	25	%
Other(b)	11	%	12	%	10	%	10	%	10	%
Total	100	%	100	%	100	%	100	%	100	%
Aircraft fuel expense	18	%	22	%	32	%	34	%	35	%

(a) Includes information for Virgin America for the period December 14, 2016 through December 31, 2016.

(b) Other includes gains and losses on settled fuel hedges, unrealized mark-to-market fuel hedge gains or losses, taxes and other into-plane costs.

We use crude oil call options as hedges to decrease our exposure to the volatility of jet fuel prices. Historically, we have had jet fuel refining margin swap contracts, but we discontinued the use of the refining margin swaps in 2014. Call options effectively cap our pricing for crude oil, limiting our exposure to increasing fuel prices for about half of our planned fuel consumption. With call options, we are hedged against spikes in crude oil prices, and during a period of decline in crude oil prices, we only forfeit cash previously paid for hedge premiums. We begin hedging approximately 18 months in advance of crude oil consumption.

We believe that operating fuel-efficient aircraft is the best hedge against high fuel prices. Alaska operates an all-Boeing 737 fleet, Virgin America operates an all-Airbus A320 family fleet, and Horizon currently operates an all-Bombardier Q400 turboprop fleet. Air Group's fuel-efficiency rate expressed in available seat miles flown per gallon ("ASMs/g") improved from 74.5 ASMs/g in 2012 to 79.7 ASMs/g in 2016. These improvements have not only reduced our fuel consumption rate, but also the amount of greenhouse gases and other pollutants that our aircraft emit.

COMPETITION

Competition in the airline industry is intense and unpredictable. Our competitors consist primarily of other airlines and, to a lesser extent, other forms of transportation. Competition can be direct, in the form of another carrier flying the exact non-stop route, or indirect, where a carrier serves the same two cities non-stop from an alternative airport in that city or via an itinerary requiring a connection at another airport. We compete with other domestic airlines and a limited number of international airlines on nearly all of our scheduled routes. Our largest competitor is Delta, who has significantly increased their capacity in Seattle over the past few years. Approximately 61% of our capacity to and from Seattle competes with Delta. Based on schedules filed with the U.S. Department of Transportation, we expect the amount of competitive capacity overlap with all carriers to increase by more than 5% in the first half of 2017, weighted based on our network.

We believe that the following principal competitive factors are important to our guests:

• Safety record

• Customer service and reputation

We compete with other airlines in areas of customer service such as on-time performance, guest amenities—including first class and other premium seating, quality of on-board products, aircraft type and comfort. In 2016, Alaska Airlines ranked highest in customer satisfaction among traditional network carriers by J.D. Power and Associates for the ninth year in a row. In 2016 we began installing Boeing Space Bins on our Boeing 737-900ER fleet, providing additional overhead bin space for our guests. In 2017, we are launching a Premium Class of service on our B737 aircraft that will provide extra legroom, early boarding, premium snacks and a complimentary alcoholic beverage. Additionally, in 2017 we are increasing the distance between seats in our first class cabins on the Alaska B737-900 and B737-900ER fleet, providing significantly more space for guests flying in the first class cabin. We expect to fully complete the first class cabin upgrades on the B737-900 and B737-900ER fleet in early 2018.

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Cabins of our Virgin America Airbus A320 family fleet have a distinctive appearance through innovative design and use of technology. Every cabin features special mood lighting, designed to create a calming, low-stress environment for our guests; custom leather seats, tailored to provide comfort, especially on our long-haul flights; inflight wireless internet access; and electrical power outlets adjacent to every seat. All of our guests flying on Virgin America aircraft have access to the Red^® inflight entertainment system that allows each guest to customize his or her inflight experience through a host of entertainment options, on-demand food and beverage ordering system and a seat-to-seat chat function.

Our employees are a key element of our product. We have a highly engaged workforce that strives to provide a high degree of service and hospitality to our guests both at the airport and in flight. We heavily emphasize our service standards with our employees through training and education programs and monetary incentives related to operational performance and guest surveys.

• Fares and ancillary services

The pricing of fares is a significant competitive factor in the airline industry, and the increased availability of fare information on the Internet allows travelers to easily compare fares and identify competitor promotions and discounts. Pricing is driven by a variety of factors including, but not limited to, market-specific capacity, market share per route/geographic area, cost structure, fare vs. ancillary revenue strategies, and demand.

For example, airlines often discount fares to drive traffic in new markets or to stimulate traffic when necessary to improve load factors. In addition, traditional network carriers have been able to reduce their operating costs through bankruptcies and mergers, while low-cost carriers have continued to grow their fleets and expand their networks, potentially enabling them to better control costs per available seat mile (the average cost to fly an aircraft seat one mile), which in turn may enable them to lower their fares. These factors can reduce our pricing power and that of the airline industry as a whole.

Domestic airline capacity is dominated by four large carriers, representing approximately 82% of total seats. Accordingly, if these carriers discount their fares or enter into our core markets, we must match those fares in order to maintain our load factors, often resulting in year-over-year decreases in our yields. We will defend our core markets vigorously and, if necessary, redeploy capacity to better match supply with demand. We believe the restructuring we've completed over the past decade has decreased our costs, enabling us to offer competitive fares while still earning appropriate returns for our shareholders.

• Routes served, flight schedules, codesharing and interline relationships, and frequent flyer programs

We also compete with other airlines based on markets served, the frequency of service to those markets and frequent flyer opportunities. Some airlines have more extensive route structures than we do, and they offer significantly more international routes. In order to expand opportunities for our guests, we enter into codesharing and interline relationships with other airlines that provide reciprocal frequent flyer mileage credit and redemption privileges. These relationships allow us to offer our guests access to more destinations than we can on our own, gain exposure in markets we don't serve and allow our guests more opportunities to earn and redeem frequent flyer miles. Our frequent flyer programs offer some of the most comprehensive benefits to our members with the ability to earn and redeem miles on 24 of our partner carriers.

In addition to domestic or foreign airlines that we compete with on most of our routes, we compete with ground transportation in our short-haul markets.  Our airlines, to some extent, also compete with technology such as video conferencing and internet-based meeting tools that have changed the need for, or frequency, of face-to-face business meetings.

TICKET DISTRIBUTION

Our tickets are distributed through three primary channels:

• Direct to customer: It is less expensive for us to sell through our direct channels at alaskaair.com and virginamerica.com. As a result, we continue to take steps to drive more business to our websites. In addition, we believe this channel is preferable from a branding and customer-relationship standpoint in that we can establish ongoing communication with the customer and tailor offers accordingly.

• Traditional and online travel agencies: Both traditional and online travel agencies typically use Global Distribution Systems (GDS) to obtain their fare and inventory data from airlines. Bookings made through these agencies result in a fee that is charged to the airline. Many of our large corporate customers require us to use these agencies. Some of our competitors do not use this distribution channel and, as a result, have lower ticket distribution costs.

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• Reservation call centers: The Alaska call centers are located in Phoenix, AZ, Kent, WA, and Boise, ID. Virgin America uses an outsourced call center. We generally charge a $15 fee for booking reservations through the Alaska call centers and $20 for booking reservations through the Virgin America call centers. We plan on combining the reservations call centers over the next several months as part of our integration efforts.

Our sales by channel are as follows: 

	2016 (a)		2015		2014		2013		2012
Direct to customer	61	%	60	%	57	%	55	%	54	%
Traditional agencies	23	%	23	%	25	%	27	%	27	%
Online travel agencies	11	%	11	%	12	%	13	%	13	%
Reservation call centers	5	%	6	%	6	%	5	%	6	%
Total	100	%	100	%	100	%	100	%	100	%

(a) Includes results for Virgin America for the period December 14, 2016 through December 31, 2016.

SEASONALITY AND OTHER FACTORS

Our results of operations for any interim period are not necessarily indicative of those for the entire year because our business is subject to seasonal fluctuations. Our profitability is generally lowest during the first and fourth quarters due principally to fewer departures and passengers. Profitability typically increases in the second quarter and then reaches its highest level during the third quarter as a result of vacation travel, including increased activity in the state of Alaska. However, we have significantly improved the seasonality of our operations by our continued growth from the West Coast to leisure destinations, like Hawaii and Costa Rica, and expanding to leisure and business destinations in the mid-continental and eastern U.S.

In addition to passenger loads, factors that could cause our quarterly operating results to vary include:  

• general economic conditions and resulting changes in passenger demand,

•      changes in fuel costs,

• pricing initiatives by us or our competitors,

• increases in competition at our primary airports, and

• increases or decreases in passenger and volume-driven variable costs.

Many of the markets we serve experience inclement weather conditions in the winter, causing increased costs associated with deicing aircraft, canceling flights and accommodating displaced passengers. Due to our geographic area of operations, we can be more susceptible to adverse weather conditions, particularly in the state of Alaska and the Pacific Northwest, than some of our competitors, who may be better able to spread weather-related risks over larger route systems. We also are more susceptible to ground delays due to our heavy concentration of departures from San Francisco International Airport.

No material part of our business or that of our subsidiaries is dependent upon a single customer, or upon a few high-volume customers.

EMPLOYEES

Our business is labor intensive. As of December 31, 2016, we employed 19,112 (12,224 at Alaska, 3,252 at Virgin America and 3,636 at Horizon) active full-time and part-time employees. Wages and benefits, including variable incentive pay, represented approximately 40% of our total non-fuel operating expenses in both 2016 and 2015.

Most major airlines, including Alaska and Horizon, have employee groups that are covered by collective bargaining agreements. Airlines with unionized work forces generally have higher labor costs than carriers without unionized work forces, and they may not have the ability to adjust labor costs downward quickly enough to respond to new competition or slowing demand. At December 31, 2016, labor unions represented 84% of Alaska’s and 43% of Horizon’s employees. Inflight teammates, our term for flight attendants at Virgin America, and pilots at Virgin America voted to be represented by unions on

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August 13, 2014 and June 4, 2015, respectively. However, as of December 31, 2016 neither Virgin America work group had completed collective bargaining agreement negotiations.

Our relations with U.S. labor organizations are governed by the Railway Labor Act ("RLA"). Under this act, collective bargaining agreements do not expire but instead become amendable as of a stated date. If either party wishes to modify the terms of any such agreement, it must notify the other party in the manner prescribed by the RLA and/or described in the agreement. After receipt of such notice, the parties must meet for direct negotiations, and if no agreement is reached, either party may request the National Mediation Board ("NMB") to initiate a process including mediation, arbitration, and a potential “cooling off” period that must be followed before either party may engage in self-help.

Alaska’s union contracts at December 31, 2016 were as follows:

Union	Employee Group	Number of Employees	Contract Status
Air Line Pilots Association International (ALPA)	Pilots	1,834	Amendable 03/31/2018
Association of Flight Attendants (AFA)	Flight attendants	3,921	Amendable 12/17/2019
International Association of Machinists and Aerospace Workers (IAM)	Ramp service and stock clerks	634	Amendable 7/19/2018
IAM	Clerical, office and passenger service	3,032	Amendable 1/1/2019
Aircraft Mechanics Fraternal Association (AMFA) (a)	Mechanics, inspectors and cleaners	684	Amendable 10/17/2016
Mexico Workers Association of Air Transport	Mexico airport personnel	86	Amendable 9/29/2016
Transport Workers Union of America (TWU)	Dispatchers	49	Amendable 3/24/2019

^(a)On December 12, 2016, Alaska reached a tentative agreement with AMFA on a proposed five-year contract. If ratified the new contract would become amendable in October 2021.

Horizon’s union contracts at December 31, 2016 were as follows:

Union	Employee Group	Number of Employees	Contract Status
International Brotherhood of Teamsters (IBT)	Pilots	618	Amendable 12/14/2024
AFA	Flight attendants	623	Amendable 07/18/2019
IBT	Mechanics and related classifications	271	Amendable 12/16/2020
National Automobile, Aerospace, Transportation and General Workers	Station personnel in  Vancouver and Victoria, BC, Canada	38	Amendable 2/14/2019
TWU	Dispatchers	18	Amendable 8/26/2018

Virgin America's union contracts at December 31, 2016 were as follows:

Union	Employee Group	Number of Employees	Contract Status
ALPA	Pilots	714	Not completed
TWU	Inflight teammates	1,068	Not completed

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EXECUTIVE OFFICERS

The executive officers of Air Group. and executive officers of Alaska, Virgin America and Horizon who have significant decision-making responsibilities, their positions and their respective ages are as follows: 

Name	Position	Age	Air Group or Subsidiary Officer Since
Bradley D. Tilden	Chairman and Chief Executive Officer of Alaska Air Group, Inc., Chairman of Alaska Airlines, Inc., Horizon Air Industries, Inc. and Virgin America Inc.	56	1994
Benito Minicucci	President and Chief Operating Officer of Alaska Airlines, Inc. and Chief Executive Officer of Virgin America Inc.	50	2004
Brandon S. Pedersen	Executive Vice President/Finance and Chief Financial Officer of Alaska Air Group, Inc. and Alaska Airlines, Inc., and Chief Financial Officer of Virgin America Inc.	50	2003
Andrew R. Harrison	Executive Vice President and Chief Commercial Officer of Alaska Airlines, Inc.	46	2008
David L. Campbell	President and Chief Executive Officer of Horizon Air Industries, Inc.	55	2014
Kyle B. Levine	Vice President Legal and General Counsel of Alaska Air Group, Inc. and Alaska Airlines, Inc. and Chief Ethics and Compliance Officer of Alaska Air Group, Inc.	45	2016

Mr. Tilden joined Alaska Airlines in 1991, became Controller of Alaska Air Group and Alaska Airlines in 1994 and was named Vice President/Finance at Alaska Airlines in January 1999 and at Alaska Air Group in February 2000. He was elected Alaska Airlines Chief Financial Officer in February 2000, Executive Vice President/Finance and Chief Financial Officer of both companies in January 2002 and Executive Vice President/Finance and Planning of Alaska Airlines in April 2007. Mr. Tilden was named, President of Alaska Airlines in December 2008, and in May 2012, he was elected President and CEO of Alaska Air Group and Alaska Airlines and CEO of Horizon Air. He leads Air Group’s Management Executive Committee and was elected to the Air Group Board in 2010 and became Chairman of the Board in January 2014.

Mr. Minicucci joined Alaska Airlines in 2004 as Staff Vice President of Maintenance and Engineering and was promoted to Vice President of Seattle Operations in June 2008. He was elected Executive Vice President/Operations and Chief Operating Officer of Alaska Airlines in December 2008. In May 2016, he was named President of Alaska Airlines and, in December 2016, Chief Executive Officer of Virgin America. He is a member of Air Group’s Management Executive Committee.

Mr. Pedersen joined Alaska Airlines in 2003 as Staff Vice President/Finance and Controller of Alaska Air Group and Alaska Airlines and was elected Vice President/Finance and Controller for both entities in 2006. He was elected Chief Financial Officer of Alaska Air Group and Alaska Airlines in June 2010 and Executive Vice President/Finance and Chief Financial Officer of both entities in 2014. In December 2016, he was named Chief Financial Officer of Virgin America Inc. He is a member of Air Group's Management Executive Committee.

Mr. Harrison joined Alaska Airlines in 2003 as the Managing Director of Internal Audit and was elected Vice President of Planning and Revenue Management in 2008. He was elected Senior Vice President of Planning and Revenue Management in 2014. He was elected Executive Vice President and Chief Revenue Officer in February 2015 and named Executive Vice President and Chief Commercial Officer in August 2015. He is a member of Air Group's Management Executive Committee.

Mr. Campbell joined Horizon Air in 2014 as President and Chief Operating Officer and was named President and Chief Executive Officer in May 2016. Prior to joining Horizon Air, Mr. Campbell served more than 25 years in maintenance and flight operations. Most recently, he served as the Vice President of Maintenance and Engineering at JetBlue Airways from January 2014 to August 2014, and, prior to that, he served as Vice President of Safety and Operational Performance at

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American Airlines. He joined American in 1988 after serving for four years in the U.S. Air Force and has overseen maintenance, quality, technical operations and safety. He is a member of Air Group's Management Executive Committee.

Mr. Levine was elected Vice President Legal and General Counsel of Alaska Air Group and Alaska Airlines in January 2016 and is a member of Air Group’s Management Executive Committee. He joined Alaska Airlines in February 2006 as a Senior Attorney. He also served as Associate General Counsel and Managing Director Commercial Law and General Litigation from July 2009 to February 2011 and, subsequently, as Deputy General Counsel and Managing Director of Legal at Alaska Airlines from February 2011 to January 2016. He was appointed Assistant Corporate Secretary of Air Group and Alaska Airlines in February 2014.

REGULATION

GENERAL

The airline industry is highly regulated, most notably by the federal government. The Department of Transportation (DOT), the Federal Aviation Administration (FAA) and the Transportation Security Administration (TSA) exercise significant regulatory authority over air carriers.

• DOT: In order to provide passenger and cargo air transportation in the U.S., a domestic airline is required to hold a certificate of public convenience and necessity issued by the DOT. Subject to certain individual airport capacity, noise and other restrictions, this certificate permits an air carrier to operate between any two points in the U.S. Certificates do not expire, but may be revoked for failure to comply with federal aviation statutes, regulations, orders or the terms of the certificates. While airlines are permitted to establish their own fares without government regulation, the DOT has jurisdiction over the approval of international codeshare agreements, marketing alliance agreements between major domestic carriers, international and some domestic route authorities, Essential Air Service market subsidies, carrier liability for personal or property damage, and certain airport rates and charges disputes. International treaties may also contain restrictions or requirements for flying outside of the U.S. and impose different carrier liability limits than those applicable to domestic flights. The DOT has been active in implementing a variety of “consumer protection” regulations, covering subjects such as advertising, passenger communications, denied boarding compensation and tarmac delay response.Airlines are subject to enforcement actions that are brought by the DOT from time to time for alleged violations of consumer protection and other economic regulations. We are not aware of any enforcement proceedings that could either materially affect our financial position or impact our authority to operate.

• FAA: The FAA, through Federal Aviation Regulations (FARs), generally regulates all aspects of airline operations, including establishing personnel, maintenance and flight operation standards. Domestic airlines are required to hold a valid air carrier operating certificate issued by the FAA. Pursuant to these regulations, we have established, and the FAA has approved, our operations specifications and a maintenance program for each type of aircraft we operate. Each maintenance program provides for the ongoing maintenance of the relevant aircraft type, ranging from frequent routine inspections to major overhauls. From time to time the FAA issues airworthiness directives (ADs) that must be incorporated into our aircraft maintenance program and operations. All airlines are subject to enforcement actions that are brought by the FAA from time to time for alleged violations of FARs or ADs. At this time, we are not aware of any enforcement proceedings that could either materially affect our financial position or impact our authority to operate.

• TSA:Airlines serving the U.S. must operate a TSA-approved Aircraft Operator Standard Security Program (AOSSP), and comply with TSA Security Directives (SDs) and regulations. Under TSA authority, we are required to collect a September 11 Security Fee of $5.60 per one-way trip from passengers and remit that sum to the government to fund aviation security measures.Airlines are subject to enforcement actions that are brought by the TSA from time to time for alleged violations of the AOSSP, SDs or security regulations. We are not aware of any enforcement proceedings that could either materially affect our financial position or impact our authority to operate.

The Department of Justice and DOT have jurisdiction over airline antitrust matters. The U.S. Postal Service has jurisdiction over certain aspects of the transportation of mail and related services. Labor relations in the air transportation industry are regulated under the Railway Labor Act. To the extent we continue to fly to foreign countries and pursue alliances with international carriers, we may be subject to certain regulations of foreign agencies and international treaties.

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ENVIRONMENTAL AND OCCUPATIONAL SAFETY MATTERS

We are subject to various laws and government regulations concerning environmental matters and employee safety and health in the U.S. and other countries. U.S. federal laws that have a particular effect on us include the Airport Noise and Capacity Act of 1990, the Clean Air Act, the Resource Conservation and Recovery Act, the Clean Water Act, the Safe Drinking Water Act, and the Comprehensive Environmental Response, Compensation and Liability Act, Superfund Amendments and Reauthorization Act, and the Oil Pollution Control Act. We are also subject to the oversight of the Occupational Safety and Health Administration (OSHA) concerning employee safety and health matters. The U.S. Environmental Protection Agency, OSHA, and other federal agencies have been authorized to create and enforce regulations that have an impact on our operations. In addition to these federal activities, various states have been delegated certain authorities under these federal statutes. Many state and local governments have adopted environmental and employee safety and health laws and regulations. We maintain our safety, health and environmental programs in order to meet or exceed these requirements.

We believe there may be local or federal legislation in the future to reduce carbon and other greenhouse gas emissions. Over the course of several years, we have transitioned to more fuel-efficient aircraft fleets and reduced our emissions with the goal of continuing that trend.

The Airport Noise and Capacity Act recognizes the rights of airport operators with noise problems to implement local noise abatement programs so long as they do not interfere unreasonably with interstate or foreign commerce or the national air transportation system. Authorities in several cities have established aircraft noise reduction programs, including the imposition of nighttime curfews. We believe we have sufficient scheduling flexibility to accommodate local noise restrictions.

Although we do not currently anticipate that these regulatory matters, individually or collectively, will have a material effect on our financial condition, results of operations or cash flows, new regulations or compliance issues that we do not currently anticipate could have the potential to harm our financial condition, results of operations or cash flows in future periods.

INSURANCE

We carry insurance of types customary in the airline industry and in amounts deemed adequate to protect our interests and property and to comply both with federal regulations and certain credit and lease agreements. The insurance policies principally provide coverage for Airline Hull, Spares and Comprehensive Legal Liability Insurance, War and Allied Perils, and Workers’ Compensation. In addition, we currently carry a Cyber Liability policy in the event of security breaches from malicious parties.

We believe that our emphasis on safety and our state-of-the-art flight deck safety technology help to control the cost of our insurance.

WHERE YOU CAN FIND MORE INFORMATION

Our filings with the Securities and Exchange Commission, including our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports are available on our website at www.alaskaair.com, free of charge, as soon as reasonably practicable after the electronic filing of these reports with the Securities and Exchange Commission. The information contained on our website is not a part of this annual report on Form 10-K.

GLOSSARY OF TERMS

Aircraft Utilization - block hours per day; this represents the average number of hours per day our aircraft are in transit

Aircraft Stage Length - represents the average miles flown per aircraft departure

ASMs - available seat miles, or “capacity”; represents total seats available across the fleet multiplied by the number of miles flown

CASM - operating costs per ASM, or "unit cost"; represents all operating expenses including fuel and special items

CASMex - operating costs excluding fuel and special items per ASM; this metric is used to help track progress toward reduction of non-fuel operating costs since fuel is largely out of our control

Debt-to-capitalization ratio - represents adjusted debt (long-term debt plus the present value of future operating lease payments) divided by total equity plus adjusted debt

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Diluted Earnings per Share - represents earnings per share ("EPS") using fully diluted shares outstanding

Diluted Shares - represents the total number of shares that would be outstanding if all possible sources of conversion, such as stock options, were exercised

Economic Fuel - best estimate of the cash cost of fuel, net of the impact of our fuel-hedging program

Free Cash Flow - total operating cash flow generated less cash paid for capital expenditures

Load Factor - RPMs as a percentage of ASMs; represents the number of available seats that were filled with paying passengers

Mainline - represents flying Boeing 737 and Airbus 320 family jets and all associated revenues and costs

PRASM - passenger revenue per ASM; commonly called “passenger unit revenue”

Productivity - number of revenue passengers per full-time equivalent employee

RASM - operating revenue per ASMs, or "unit revenue"; operating revenue includes all passenger revenue, freight & mail, Mileage Plan and other ancillary revenue; represents the average total revenue for flying one seat one mile

Regional - represents capacity purchased by Alaska from Horizon, SkyWest and PenAir. In this segment, Regional records actual on-board passenger revenue, less costs such as fuel, distribution costs, and payments made to Horizon, SkyWest and PenAir under the respective capacity purchased arrangement (CPAs). Additionally, Regional includes an allocation of corporate overhead such as IT, finance, other administrative costs incurred by Alaska and on behalf of Horizon.

RPMs - revenue passenger miles, or "traffic"; represents the number of seats that were filled with paying passengers; one passenger traveling one mile is one RPM

Yield - passenger revenue per RPM; represents the average revenue for flying one passenger one mile

ITEM 1A. RISK FACTORS

If any of the following occurs, our business, financial condition and results of operations could suffer. In such case, the trading price of our common stock could also decline. We operate in a continually changing business environment.  In this environment, new risks may emerge, and already identified risks may vary significantly in terms of impact and likelihood of occurrence. Management cannot predict such developments, nor can it assess the impact, if any, on our business of such new risk factors or of events described in any forward-looking statements.

We have adopted an enterprise wide Risk Analysis and Oversight Program designed to identify the various risks faced by the organization, assign responsibility for managing those risks to individual executives as well as align these risks with Board oversight. These enterprise-level risks have been aligned to the risk factors discussed below.

SAFETY, COMPLIANCE AND OPERATIONAL EXCELLENCE

Our reputation and financial results could be harmed in the event of an airline accident or incident.

An accident or incident involving one of our aircraft or an aircraft operated by one of our codeshare partners or CPA carriers could involve a significant loss of life and result in a loss of confidence in our airlines by the flying public and/or aviation authorities. We could experience significant claims from injured passengers, bystanders and surviving relatives as well as costs for the repair or replacement of a damaged aircraft and its consequential temporary or permanent loss from service. We maintain liability insurance in amounts and of the type generally consistent with industry practice, as do our codeshare partners and CPA carriers. However, the amount of such coverage may not be adequate to fully cover all claims, and we may be forced to bear substantial economic losses from such event. Substantial claims resulting from an accident in excess of our related insurance coverage would harm our business and financial results. Moreover, any aircraft accident or incident, even if it is fully insured and does not involve one of our aircraft, could cause a public perception that our airlines or the aircraft we or our partners fly are less safe or reliable than other transportation alternatives. This would harm our business.

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Our operations are often affected by factors beyond our control, including delays, cancellations and other conditions, which could harm our business, financial condition and results of operations.

As is the case for all airlines, our operations often are affected by delays, cancellations and other conditions caused by factors largely beyond our control.

Factors that might impact our operations include:

• congestion and/or space constraints at airports or air traffic control problems;

• lack of operational approval (e.g. new routes, aircraft deliveries, etc.);

• adverse weather conditions;

• increased security measures or breaches in security;

• contagious illness and fear of contagion;

• changes in international treaties concerning air rights;

• international or domestic conflicts or terrorist activity; and

• other changes in business conditions.

Due to our concentration of flights in the Pacific Northwest and Alaska, we believe a large portion of our operation is more susceptible to adverse weather conditions. A general reduction in airline passenger traffic as a result of any of the above-mentioned factors could harm our business, financial condition and results of operations.

Changes in government regulation imposing additional requirements and restrictions on our operations could increase our operating costs and result in service delays and disruptions.

Airlines are subject to extensive regulatory and legal requirements, both domestically and internationally, that involve significant compliance costs. In the last several years, Congress has passed laws, and the U.S. DOT, the TSA and the FAA have issued regulations that have required significant expenditures relating to maintenance of aircraft, operation of airlines and establishment of consumer protection.

Similarly, there are a number of legislative and regulatory initiatives and reforms at the federal, state and local levels. These initiatives include increasingly stringent laws to protect the environment, minimum wage requirements and health care mandates. They could affect our relationship with our workforce and the vendors that serve our airlines and cause our expenses to increase without an ability to pass through these costs. 

Almost all commercial service airports are owned and/or operated by units of local or state governments. Airlines are largely dependent on these governmental entities to provide adequate airport facilities and capacity at an affordable cost. Many airports have increased their rates and charges to air carriers to reflect higher costs of security, updates to infrastructures and other. Additional laws, regulations, taxes, airport rates and airport charges may be occasionally proposed that could significantly increase the cost of airline operations or reduce the demand for air travel. Although lawmakers may impose these additional fees and view them as “pass-through” costs, we believe that a higher total ticket price will influence consumer purchase and travel decisions and may result in an overall decline in passenger traffic, which would harm our business.

The airline industry continues to face potential security concerns and related costs.

Terrorist attacks, the fear of such attacks or other hostilities involving the U.S. could have a significant negative effect on the airline industry, including us, and could:

• significantly reduce passenger traffic and yields as a result of a potentially dramatic drop in demand for air travel;

• significantly increase security and insurance costs;

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• make war risk or other insurance unavailable or extremely expensive;

• increase fuel costs and the volatility of fuel prices;

• increase costs from airport shutdowns, flight cancellations and delays resulting from security breaches and perceived safety threats; and

• result in a grounding of commercial air traffic by the FAA.

The occurrence of any of these events would harm our business, financial condition and results of operations.

We rely on third-party vendors for certain critical activities.

We rely on outside vendors for a variety of services and functions critical to our business, including airframe and engine maintenance, ground handling, fueling, computer reservation system hosting, telecommunication systems and information technology infrastructure and services.

Even though we strive to formalize agreements with these vendors that define expected service levels, our use of outside vendors increases our exposure to several risks. In the event that one or more vendors go into bankruptcy, ceases operation or fails to perform as promised, replacement services may not be readily available at competitive rates, or at all. If one of our vendors fails to perform adequately, we may experience increased costs, delays, maintenance issues, safety issues or negative public perception of our airline. Vendor bankruptcies, unionization, regulatory compliance issues or significant changes in the competitive marketplace among suppliers could adversely affect vendor services or force us to renegotiate existing agreements on less favorable terms. These events could result in disruptions in our operations or increases in our cost structure.

STRATEGY

The airline industry is highly competitive and susceptible to price discounting and changes in capacity, which could have a material adverse effect on our business. If we cannot successfully compete in the marketplace, our business, financial condition and operating results will be materially adversely affected.

The U.S. airline industry is characterized by substantial price competition. In recent years, the market share held by low-cost carriers and ultra low-cost carriers has increased significantly and is expected to continue to increase. Airlines also compete for market share by increasing or decreasing their capacity, route systems and the number of markets served. Several of our competitors have increased their capacity in markets we serve, particularly on the West Coast and in our Seattle hub, resulting in increased competition for those destinations. Increased competition in both domestic and international markets may have a material adverse effect on our results of operations, financial condition or liquidity.

We continue to strive toward aggressive cost-reduction goals that are an important part of our business strategy of offering the best value to our guests through competitive fares while achieving acceptable profit margins and return on capital. If we are unable to reduce our costs over the long-term and achieve sustained targeted returns on invested capital, we will likely not be able to grow our business in the future or weather industry downturns. Therefore, our financial results may suffer.

The airline industry may undergo further restructuring, consolidation, or the creation or modification of alliances or joint ventures, any of which could have a material adverse effect on our business, financial condition and results of operations.

We continue to face strong competition from other carriers due to restructuring, consolidation, and the creation and modification of alliances and joint ventures. Since deregulation, both the U.S. and international airline industries have experienced consolidation through a number of mergers and acquisitions. Carriers may also improve their competitive positions through airline alliances, slot swaps/acquisitions and/or joint ventures. Certain airline joint ventures further competition by allowing airlines to coordinate routes, pool revenues and costs, and enjoy other mutual benefits, achieving many of the benefits of consolidation.

We depend on a few key markets to be successful.

Our strategy includes being the premier carrier for people living on the West Coast. This results in a high concentration of our business in key West Coast markets. A significant portion of our flights occur to and from our Seattle hub. In 2016, passengers to and from Seattle accounted for 61% of our total guests. We expect this to become more diversified in the future as a result of the recent acquisition of Virgin America, whose primary hubs are San Francisco and Los Angeles.

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We believe that concentrating our service offerings in this way allows us to maximize our investment in personnel, aircraft and ground facilities, as well as to gain greater advantage from sales and marketing efforts in those regions. As a result, we remain highly dependent on our key markets. Our business could be harmed by any circumstances causing a reduction in demand for air transportation in our key markets. An increase in competition in our key markets could also cause us to reduce fares or take other competitive measures that, if sustained, could harm our business, financial condition and results of operations.

Economic uncertainty or another recession would likely impact demand for our product and could harm our financial condition and results of operations.

The airline industry, which is subject to relatively high fixed costs and highly variable and unpredictable demand, is particularly sensitive to changes in economic conditions. We are also highly dependent on U.S. consumer confidence and the health of the U.S. economy. Unfavorable U.S. economic conditions have historically driven changes in travel patterns and have resulted in reduced spending for both leisure and business travel. For some consumers, leisure travel is a discretionary expense, and shorter distance travelers, in particular, have the option to replace air travel with surface travel. Businesses are able to forgo air travel by using communication alternatives such as videoconferencing or may be more likely to purchase less expensive tickets to reduce costs, which can result in a decrease in average revenue per seat. Unfavorable economic conditions also hamper the ability of airlines to raise fares to counteract increased fuel, labor and other costs. Unfavorable or even uncertain economic conditions could negatively affect our financial condition and results of operations.

We are dependent on a limited number of suppliers for aircraft and parts.

Alaska is dependent on Boeing as its sole supplier for aircraft and many aircraft parts. Virgin America is similarly dependent on Airbus, and Horizon is dependent on Bombardier and soon Embraer. Additionally, each carrier is dependent on sole suppliers for aircraft engines for each aircraft type. As a result, we are more vulnerable to issues associated with the supply of those aircraft and parts, including design defects, mechanical problems, contractual performance by the manufacturers or adverse perception by the public that would result in customer avoidance or in actions by the FAA resulting in an inability to operate our aircraft or instability in the foreign countries, in which the aircraft and its parts are manufactured.

We rely on partner airlines for codeshare and frequent flyer marketing arrangements.

Our airlines are parties to marketing agreements with a number of domestic and international air carriers, or “partners." These agreements provide that certain flight segments operated by us are held out as partner “codeshare” flights and that certain partner flights are held out for sale as Alaska or Virgin America codeshare flights. In addition, the agreements generally provide that members of Alaska’s Mileage Plan™ program, or Virgin America's Elevate® program, can earn credit on or redeem credit for partner flights and vice versa. We receive revenue from flights sold under codeshare and from interline arrangements. In addition, we believe that the frequent flyer arrangements are an important part of our frequent flyer programs. The loss of a significant partner through bankruptcy, consolidation, or otherwise, could have a negative effect on our revenues or the attractiveness of our Mileage Plan™ and Elevate® programs, which we believe is a source of competitive advantage.

We routinely engage in analysis and discussions regarding our own strategic position, including alliances, codeshare arrangements, interline arrangements and frequent flyer program enhancements, and may have future discussions with other airlines regarding similar activities. If other airlines participate in consolidation or reorganization, those airlines may significantly improve their cost structures or revenue generation capabilities, thereby potentially making them stronger competitors of ours and potentially impairing our ability to realize expected benefits from our own strategic relationships.

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INFORMATION TECHNOLOGY

We rely heavily on automated systems to operate our business, and a failure to invest in new technology or a disruption of our current systems or their operators could harm our business.

We depend on automated systems to operate our business, including our airline reservation system, our telecommunication systems, our website, our maintenance systems, our check-in kiosks, mobile devices and other systems. Substantially all of our tickets are issued to our guests as electronic tickets, and the majority of our customers check in using our website, airport kiosks, or our mobile application. We depend on our reservation system to be able to issue, track and accept these electronic tickets. In order for our operations to work efficiently, we must continue to invest in new technology to ensure that our website, reservation system and check-in systems are able to accommodate a high volume of traffic, maintain information security and deliver important flight information. Substantial or repeated website, reservations system or telecommunication systems failures or service disruptions could reduce the attractiveness of our services and cause our guests to do business with another airline. In addition, we rely on other automated systems for crew scheduling, flight dispatch and other operational needs. In 2017, subsequent to year end, we migrated to a new crew management system. We also plan to move our primary data center location. Disruptions, failed migration, untimely recovery, or a breach of these systems or the data center could result in the loss of important data, an increase of our expenses, an impact on our operational performance or a possible temporary cessation of our operations.

If we do not maintain the privacy and security of our information, we could damage our reputation and incur substantial legal and regulatory costs.

We accept, store and transmit information about our guests, our employees, our business partners and our business.  In addition, we frequently rely on third-party hosting sites and data processors, including cloud providers. Our sensitive information relies on secure transmission over public and private networks.  A compromise of our systems, the security of our infrastructure or those of other business partners that result in our information being accessed or stolen by unauthorized persons could adversely affect our operations and our reputation.

FINANCIAL CONDITION AND FINANCIAL MARKETS

Our business, financial condition and results of operations are substantially exposed to the volatility of jet fuel prices. Significant increases in jet fuel costs would harm our business.

Fuel costs constitute a significant portion of our total operating expenses. Future increases in the price of jet fuel may harm our business, financial condition and results of operations unless we are able to increase fares and fees or add additional ancillary services to attempt to recover increasing fuel costs.

Our indebtedness and other fixed obligations could increase the volatility of earnings and otherwise restrict our activities and potentially lead to liquidity constraints.

We incurred a significant amount of new debt to finance our acquisition of Virgin America. We now have and will continue to have for the foreseeable future a substantial amount of debt. Due to our high fixed costs, including aircraft lease commitments and debt service, a decrease in revenues would result in a disproportionately greater decrease in earnings.

Our outstanding long-term debt and other fixed obligations could have important consequences. For example, they could limit our ability to obtain additional financing to fund our future capital expenditures, acquisitions, working capital or other purposes; require us to dedicate a material portion of our operating cash flow to fund lease payments and interest payments on indebtedness, thereby reducing funds available for other purposes; or limit our ability to withstand competitive pressures and reduce our flexibility in responding to changing business and economic conditions.

Although we have historically been able to generate sufficient cash flow from our operations to pay our debt and other fixed obligations when they become due, we cannot ensure we will be able to do so in the future. If we fail to do so, our business could be harmed.

See "Liquidity and Capital Resources" within Item 7 of this filing for more detailed information about our obligations and commitments.

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Certain of our financing agreements have covenants that impose operating and financial restrictions on us.

Certain of our credit facilities and indentures governing our secured borrowings impose certain operating and financial covenants on us. Such covenants require us to maintain, depending on the particular agreement, minimum liquidity and/or minimum collateral coverage ratios and other negative covenants customary for such financings. A decline in the value of collateral could result in a situation where we may not be able to maintain the required collateral coverage ratio.

Our ability to comply with these covenants may be affected by events beyond our control, including the overall industry revenue environment and the level of fuel costs, and we may be required to seek waivers or amendments of covenants, repay all or a portion of the debt or find alternative sources of financing.

Our maintenance costs will increase as our fleet ages, and we will periodically incur substantial maintenance costs due to the maintenance schedules of our aircraft fleet.

As of December 31, 2016, the average age of our NextGen aircraft (B737-800, -900, -900ERs) was approximately 7.3 years, the average age of our Q400 aircraft was approximately 10 years, and the average age of our A319 and A320 aircraft was approximately 6.8 years. Our relatively new aircraft currently require less maintenance than they will in the future. Any significant increase in maintenance expenses could have a material adverse effect on our results of operations.

BRAND AND REPUTATION

As we evolve our brand to appeal to a changing demographic and grow into new markets, we will engage in strategic initiatives that may not be favorably received by all our guests.

We continue to focus on strategic initiatives designed to increase our brand appeal to a diverse and evolving demographic of airline travelers. These efforts could include significant enhancements to our in-airport and on-board environments, increasing our direct customer relationships through improvements to our purchasing portals (digital and mobile) and optimization of our customer loyalty programs.

In pursuit of these efforts we may negatively affect our reputation with some of our existing customer base.

LABOR RELATIONS AND LABOR STRATEGY

A significant increase in labor costs, unsuccessful attempts to strengthen our relationships with union employees or loss of key personnel could adversely affect our business and results of operations.

Labor costs are a significant component of our total expenses. Each of Alaska and Horizon's represented employee groups has a separate collective bargaining agreement. Through negotiations or transition agreements in the Virgin America integration, each group could make demands that would increase our operating expenses and adversely affect our financial performance if we agree to them. The same result could apply if we experience a significant increase in vendor labor costs, including wage rate increases, which could ultimately flow through to us under the applicable services agreement.

As of December 31, 2016, labor unions represented approximately 84% of Alaska’s and 43% of Horizon’s employees. Although Virgin America employees are not currently covered under collective bargaining agreements, pilots and inflight teammates have elected to be represented and will, through negotiations, ultimately enter into joint collective bargaining agreements with Alaska's represented workforce. Although we have been successful in fostering communications, negotiating approaches and developing other strategies to enhance workforce engagement in our long-term vision, future uncertainty around open contracts—including the joint collective bargaining negotiations for the integration of Alaska's and Virgin America's represented work groups—could be a distraction, affecting employee focus on our business and diverting management’s attention from other projects and issues.

We compete against the major U.S. airlines and other businesses for labor in many highly skilled positions. If we are unable to hire, train and retain qualified employees at a reasonable cost, sustain employee engagement in our strategic vision, or if we are unsuccessful at implementing succession plans for our key staff, we may be unable to grow or sustain our business. In recent years, there have been pilot shortages in hiring in the regional market, and there is an anticipated pilot shortage in hiring in the mainline markets in the next two to three years. Attrition beyond normal levels could negatively impact our operating results, and our business prospects could be harmed.

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Employees could also engage in job actions such as slow-downs, work-to-rule campaigns, sick-outs or other actions designed to disrupt our normal operations in an attempt to pressure us to acquiesce to wage or other demands during Section 6 negotiations or transition agreement discussions. Although the Railway Labor Act makes such “self-help” unlawful until the National Mediation Board releases the parties following lengthy mediation attempts, and we could seek injunctive relief or other remedies against premature self-help, such actions could cause significant harm even if we were ultimately to be successful.

ACQUISITION AND INTEGRATION OF VIRGIN AMERICA

We may be unable to effectively integrate Virgin America’s business and realize the anticipated benefits of the acquisition. In addition, delays in integration could cause anticipated synergies to take longer to realize than currently anticipated.

We must devote significant management attention and resources to integrating the business practices and operations of Virgin America. Potential difficulties we may encounter as part of the integration process include the following:

• the inability to successfully combine the Virgin America business with that of Alaska's in a manner that permits us to achieve anticipated net synergies and other anticipated benefits of the acquisition;

• the inability to successfully attract and retain Virgin America guests upon integration with Alaska;

• the challenges associated with operating aircraft types new to our operations, specifically the Airbus A319 and A320;

• the challenges associated with an expanded or new presence in more congested airports and markets;

• the challenges associated with integrating complex systems, technology, aircraft fleets, networks, facilities and other assets in a seamless manner that minimizes any adverse impact on guests, suppliers, employees and other constituents;

• the challenges associated with integrating Virgin America employees into Alaska's workforce while maintaining our focus on providing consistent, high quality customer service, including seniority list integration, negotiation of transition process agreements and, in the case of the pilot workgroups, negotiation of a joint collective bargaining agreement; and

• potential unknown liabilities, liabilities that are significantly larger than we currently anticipate, and unforeseen increased expenses or delays, including costs to integrate Virgin America’s business that may exceed our current estimates.

Any of the foregoing factors could adversely affect our ability to maintain relationships with guests, suppliers, employees and other constituencies or our ability to achieve the anticipated benefits of the acquisition on a timely basis, or at all. These factors could also reduce our earnings or otherwise adversely affect our business and financial results. In addition, integration requirements have caused, and may continue to cause, a delay of other strategic initiatives.

The Virgin brand is not under our control, and negative publicity related to the Virgin brand name could materially adversely affect our business.

Virgin America licenses rights to the Virgin brand from certain entities affiliated with the Virgin Group on a non-exclusive basis. The Virgin brand is also licensed to and used by a number of other companies, including two airlines, Virgin Atlantic Airways and Virgin Australia Airlines, operating in other geographies. We rely on the general goodwill of consumers and our employees towards the Virgin brand. Consequently, any adverse publicity in relation to the Virgin brand name, its principals, particularly Sir Richard Branson who is closely associated with the brand, or another Virgin-branded company over which we have no control or influence could have a material adverse effect on our business.

We obtain our rights to use the Virgin brand under agreements with certain entities affiliated with the Virgin Group, and we would lose those rights if these agreements are terminated or not renewed.

Virgin America is a party to license agreements with certain entities affiliated with the Virgin Group pursuant to which we obtain rights to use the Virgin brand. The licensor may terminate the agreements upon the occurrence of a number of specified events including if Virgin America commits a material breach of our obligations under the agreements that is uncured for more than 10 business days or if we materially damage the Virgin brand. If we lose our rights to use the Virgin brand, we would lose the goodwill associated with the brand name, which would likely require substantial expenditures, and our business and financial condition would likely be materially adversely affected.

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The need to integrate Virgin America’s workforce into joint collective bargaining agreements with Alaska's workforce presents the potential for delay in achieving expected synergies and other benefits or labor disputes that could adversely affect our operations and costs.

The successful integration of Virgin America and achievement of the anticipated benefits of the acquisition depend significantly on integrating Virgin America’s employees into Alaska and on maintaining productive employee relations. Failure to do so presents the potential for delays in achieving expected synergies and other benefits of integration or labor disputes that could adversely affect our operations and costs. The process for integrating labor groups in an airline merger is governed by a combination of the Railway Labor Act, the McCaskill-Bond Act, and where applicable, the existing provisions of our collective bargaining agreements (“CBAs”) and internal union policies.

Under the Railway Labor Act, the National Mediation Board has exclusive authority to resolve representation disputes arising out of airline mergers. The disputes that the National Mediation Board has authority to resolve include (i) whether the carriers, through the merger, have integrated operations to the point of creating a “single transportation system” for representation purposes; (ii) determination of the appropriate “craft or class” for representational purposes, including a determination of which positions are to be included within a particular craft or class; and (iii) certification of the system-wide representative organization, if any, for each of our craft or class following the merger. Failure to resolve these disputes could result in delays in achieving expected synergies and other benefits of integration as well as adversely impact our operations and costs.

Pending operational integration of Virgin America with Alaska, it will be necessary to maintain a “fence” between Alaska and Virgin America employee groups that are represented by unions. During this time, we will keep the employee groups separate, each applying the terms of its own existing employment agreements unless other terms have been negotiated. Achievement of expected synergies and other benefits will be delayed until the time that operational integration is obtained.

We are expected to incur substantial expenses related to the acquisition and the integration of Virgin America’s business.

We are expected to incur substantial integration and transition expenses in connection with the acquisition of Virgin America, including the necessary costs associated with integrating the operations of Alaska and Virgin America. There are a large number of processes, policies, procedures, operations, technologies and systems that must be integrated, including reservations, frequent flyer, ticketing/distribution, maintenance and flight operations. While we have assumed that a certain level of expenses will be incurred, there are many factors beyond our control that could affect the total amount or the timing of the integration expenses. Moreover, many of the expenses that will be incurred are, by their nature, difficult to estimate accurately. These expenses could, particularly in the near term, exceed the financial benefits we expect to achieve from the acquisition, including the elimination of duplicative expenses and the realization of economies of scale and cost savings. These integration expenses likely will continue to result in us taking significant charges against earnings in future periods, and the amount and timing of such charges are uncertain at present.

We acquired Virgin America’s indebtedness upon closing of the acquisition, which additional indebtedness may limit our financial and operating flexibility.

Upon closing of the acquisition, we acquired Virgin America’s outstanding indebtedness and became subject to the operating restrictions under the debt instruments governing such indebtedness. Virgin America has significant debt and lease obligations related to existing purchased and leased aircraft. Our increased indebtedness following the acquisition may:

• require a substantial portion of cash flows from operations for debt service payments and operating lease payments, thereby reducing the availability of our cash flow to fund working capital, capital expenditures, acquisitions and other general corporate purposes; and

• limit our flexibility in planning for, or reacting to, changes in its business and the airline industry and, consequently, negatively affect our competitive position.

We will need to launch certain branding or rebranding initiatives in connection with the acquisition that may take a significant amount of time and involve substantial costs and that may not be favorably received by our guests.

We may incur substantial costs if we decide to rebrand any of Virgin America’s products and services and may not be able to achieve or maintain brand name recognition or status that is comparable to the recognition and status previously enjoyed by Virgin America in any of Virgin America’s markets. The failure of any such rebranding initiatives could adversely affect our ability to attract and retain guests, which could cause us not to realize some or all of the anticipated benefits contemplated to result from the acquisition.

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Our ability to use Virgin America’s net operating loss carryforwards to offset future taxable income for U.S. federal and state income tax purposes may be limited as a result of the previous ownership changes, this acquisition or taxable income if it does not reach sufficient levels.

As of the acquisition closing date, Virgin America had federal net operating loss carryforwards (“NOLs”) of approximately $773 million available to offset future taxable income, expiring between 2028 and 2036, and state NOLs of approximately $344 million that expire beginning in 2027 and continuing through 2035.

Virgin America has experienced multiple “ownership changes” as defined in Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), the most recent being its acquisition by us. Section 382 of the Code imposes an annual limitation on the amount of pre-ownership change NOLs of the corporation that experiences ownership change. The limitation imposed by Section 382 of the Code for any post-ownership change year generally would be determined by multiplying the value of such corporation’s stock immediately before the ownership change by the applicable long-term tax-exempt rate. Any unused annual limitation may, subject to certain limits, be carried over to later years, and the limitation may, under certain circumstances, be increased by built-in gains or reduced by built-in losses in the assets held by such corporation at the time of the ownership change. Our use of NOLs generated after the date of an ownership change would not be limited unless we were to experience a subsequent ownership change.

Our ability to use the NOLs will also depend on the amount of taxable income generated in future periods. The NOLs may expire before we can generate sufficient taxable income to utilize the NOLs.

The application of the acquisition method of accounting resulted in us recording a significant amount of goodwill, which could result in significant future impairment charges and negatively affect our financial results.

In accordance with applicable acquisition accounting rules, we recorded goodwill on our consolidated balance sheet to the extent the Virgin America acquisition purchase price exceeded the net fair value of Virgin America’s tangible and identifiable intangible assets and liabilities as of the acquisition date. Goodwill is not amortized, but is tested for impairment at least annually. We could record impairment charges in our results of operations as a result of, among other items, extreme fuel price volatility, a significant decline in the fair value of certain tangible or intangible assets, unfavorable trends in forecasted results of operations and cash flows, uncertain economic environment and other uncertainties. We can provide no assurance that a significant impairment charge will not occur in one or more future periods. Any such charges may materially negatively affect our financial results.

ITEM 1B.     UNRESOLVED STAFF COMMENTS

 None

ITEM 2.      PROPERTIES

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AIRCRAFT

The following table describes the aircraft we operate and their average age at December 31, 2016:

Aircraft Type	Seats	Owned	Leased	Total	Average Age in Years
B737 Freighter & Combis	0/72	6	—	6	23.2
B737-400	144	3	7	10	20.9
B737 NextGen	124-181	129	10	139	7.3
A319	119	—	10	10	9.2
A320	146-149	10	43	53	6.3
Total Mainline Fleet		148	70	218	8.2
Q400	76	37	15	52	10.0
E175	76	—	15	15	0.8
Total Regional Fleet		37	30	67	7.9
Total		185	100	285	8.2

“Management’s Discussion and Analysis of Financial Condition and Results of Operations" discusses future orders and options for additional aircraft. “Liquidity and Capital Resources" provides more information about aircraft that are used to secure long-term debt arrangements or collateralize credit facilities.

Alaska’s leased B737 aircraft have lease expiration dates between 2017 and 2023. Virgin America's leased A319 and A320 aircraft have expiration dates between 2019 and 2025. Horizon’s leased Q400 aircraft have expiration dates in 2018. The leased E175 aircraft are through our capacity purchase agreement with SkyWest. Alaska, Virgin America and Horizon have the option to extend some of the leases for additional periods, or the right to purchase the aircraft at the end of the lease term, usually at the then-fair-market value of the aircraft. Air Group also owns two non-operating CRJ-700 aircraft classified as held-for-sale as of December 31, 2016.

GROUND FACILITIES AND SERVICES

We own terminal buildings in various cities in the state of Alaska and several buildings located at or near Seattle-Tacoma International Airport (Sea-Tac) near Seattle, WA. These include a multi-bay hangar and shops complex (used primarily for line maintenance), a flight operations and training center, an air cargo facility, an information technology office and data center, and various other commercial office buildings.

We lease ticket counters, gates, cargo and baggage space, ground equipment, office space and other support areas at the majority of the airports we serve. Airport leases contain provisions for periodic adjustments of lease rates. We are typically responsible for maintenance, insurance and other facility-related expenses and services under these agreements. We also lease operations, training, data center, and administrative facilities in Burlingame, CA; Portland, OR; Quincy, WA; and Spokane, WA as well as line maintenance stations in Boise, ID; Bellingham, WA; Eugene, OR; San Jose, CA; Medford, OR; Redmond, OR; Seattle, WA; and Spokane, WA. Further, we lease call center facilities in Phoenix, AZ, and Boise, ID.

ITEM 3.  LEGAL PROCEEDINGS

We are a party to routine litigation matters incidental to our business. Management believes the ultimate disposition of these matters is not likely to materially affect our financial position or results of operations. This forward-looking statement is based on management’s current understanding of the relevant law and facts, and it is subject to various contingencies, including the potential costs and risks associated with litigation and the actions of judges and juries.

In 2015, three flight attendants filed a class action lawsuit seeking to represent all Virgin America flight attendants for damages based on alleged violations of California and City of San Francisco wage and hour laws.  Plaintiffs received class certification in November 2016. Virgin America filed a motion for summary judgment seeking to dismiss all claims on various federal preemption grounds.  In January 2017, the Court denied in part and granted in part Virgin America’s motion.  Virgin America believes the claims in this case are without factual and legal merit and intends to defend this lawsuit through, among other

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strategies, filing a motion for reconsideration of the Court’s certification decision and denial of summary judgment and, if necessary, a motion for certification of interlocutory appeal to the U.S. Court of Appeals for the Ninth Circuit.

ITEM 4.       MINE SAFETY DISCLOSURES

Not applicable.

PART II

ITEM 5. MARKET FOR THE REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS, AND ISSUER PURCHASES OF EQUITY SECURITIES

As of December 31, 2016, there were 129,189,634 shares of common stock of Alaska Air Group, Inc. issued and 123,328,051 shares outstanding and 2,277 shareholders of record. In 2016, we paid quarterly dividends of $0.275 per share in March, June, September and December. Our common stock is listed on the New York Stock Exchange (symbol: ALK). The following table shows the trading range of Alaska Air Group, Inc. common stock on the New York Stock Exchange: 

	2016				2015
	High		Low		High		Low
First Quarter	$	83.05	$	61.58	$	70.83	$	57.73
Second Quarter	83.09		54.53		68.68		58.15
Third Quarter	71.57		56.47		82.75		62.59
Fourth Quarter	91.88		65.60		87.16		73.00

SALES OF NON-REGISTERED SECURITIES

None.

PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS

None during the quarter ended December 31, 2016.

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PERFORMANCE GRAPH

The following graph compares our cumulative total stockholder return since December 31, 2011 with the S&P 500 Index and the Dow Jones U.S. Airlines Index. The graph assumes that the value of the investment in our common stock and each index (including reinvestment of dividends) was $100 on December 31, 2011.

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ITEM 6. SELECTED FINANCIAL AND OPERATING DATA

Virgin America became a wholly-owned subsidiary of Air Group on December 14, 2016. Operating results, financial position and operating statistics presented below include Virgin America data for the period December 14, 2016 through December 31, 2016, and the impact of purchase accounting as of December 14, 2016 in the "consolidated" and "mainline" results. Refer to "Critical Accounting Estimates" section of Item 7 for further information regarding purchase accounting.

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Year Ended December 31 (in millions, except per-share amounts):	2016			2015		2014		2013			2012
CONSOLIDATED OPERATING RESULTS (audited)
Operating Revenues	$	5,931		$	5,598	$	5,368	$	5,156		$	4,657
Operating Expenses	4,582			4,300		4,406		4,318			4,125
Operating Income	1,349			1,298		962		838			532
Nonoperating income (expense), net of interest capitalized(a)	(4		)	14		13		(22		)	(18		)
Income before income tax	1,345			1,312		975		816			514
Net Income	$	814		$	848	$	605	$	508		$	316
Average basic shares outstanding	123.557			128.373		135.445		139.910			141.416
Average diluted shares outstanding	124.389			129.372		136.801		141.878			143.568
Basic earnings per share	$	6.59		$	6.61	$	4.47	$	3.63		$	2.23
Diluted earnings per share	$	6.54		$	6.56	$	4.42	$	3.58		$	2.20
Cash dividends declared per share	$	1.10		$	0.80	$	0.50	$	0.20		—
CONSOLIDATED FINANCIAL POSITION (audited)
At End of Period (in millions):
Total assets(b)	$	9,962		$	6,530	$	6,059	$	5,719		$	5,350
Long-term debt, including current portion(b)	$	2,964		$	683	$	798	$	865		$	1,025
Shareholders' equity	$	2,931		$	2,411	$	2,127	$	2,029		$	1,421
OPERATING STATISTICS (unaudited)(e)
Consolidated:(c)
Revenue passengers (000)	34,289			31,883		29,278		27,414			25,896
RPMs (000,000) "traffic"	37,209			33,578		30,718		28,833			27,007
ASMs (000,000) "capacity"	44,135			39,914		36,078		33,672			31,428
Load factor	84.3%			84.1%		85.1%		85.6%			85.9%
Yield	13.45¢			14.27¢		14.91¢		14.80¢			14.92¢
PRASM	11.34¢			12.01¢		12.69¢		12.67¢			12.82¢
RASM	13.44¢			14.03¢		14.88¢		14.74¢			14.82¢
CASMex(d)	8.23¢			8.30¢		8.36¢		8.47¢			8.48¢
Mainline:
Revenue passengers (000)	24,838			22,869		20,972		19,737			18,526
RPMs (000,000) "traffic"	33,489			30,340		27,778		26,172			24,417
ASMs (000,000) "capacity"	39,473			35,912		32,430		30,411			28,180
Load factor	84.8%			84.5%		85.7%		86.1%			86.6%
Yield	12.24¢			12.98¢		13.58¢		13.33¢			13.45¢
PRASM	10.38¢			10.97¢		11.64¢		11.48¢			11.65¢
CASMex(d)	7.30¢			7.39¢		7.45¢		7.54¢			7.56¢
Regional (c):
Revenue passengers (000)	9,452			9,015		8,306		7,677			7,371
RPMs (000,000) "traffic"	3,720			3,238		2,940		2,661			2,590
ASMs (000,000) "capacity"	4,662			4,002		3,648		3,261			3,247
Load factor	79.8%			80.9%		80.6%		81.6%			79.8%
Yield	24.42¢			26.37¢		27.40¢		29.20¢			28.81¢
PRASM	19.49¢			21.34¢		22.08¢		23.83¢			22.98¢

(a) Capitalized interest was $25 million, $34 million, $20 million, $21 million and $18 million for 2016, 2015, 2014, 2013 and 2012.

(b) In the first quarter of 2016, we retrospectively adopted Accounting Standards Update 2015-03 "Simplifying the Presentation of Debt Issuance Costs." Prior year amounts have been adjusted to reflect a reclassification of debt issuance costs.

(c) Includes flights under Capacity Purchase Agreements operated by SkyWest and PenAir.

(d) See reconciliation to the most directly related Generally Accepted Accounting Principles ("GAAP") measure in the "Results of Operations" section.

(e) See "Glossary of Terms" for definitions of the abbreviated terms.

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ITEM 7.     MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations ("MD&A") is intended to help the reader understand our company, our operations and our present business environment. MD&A is provided as a supplement to – and should be read in conjunction with – our consolidated financial statements and the accompanying notes. All statements in the following discussion that are not statements of historical information or descriptions of current accounting policy are forward-looking statements. Please consider our forward-looking statements in light of the risks referred to in this report’s introductory cautionary note and the risks mentioned in Part I, “Item 1A. Risk Factors.” This overview summarizes the MD&A, which includes the following sections:

• Year in Review—highlights from 2016 outlining some of the major events that happened during the year and how they affected our financial performance.

• Results of Operations—an in-depth analysis of our revenues by segment and our expenses from a consolidated perspective for the three years presented in our consolidated financial statements. To the extent material to the understanding of segment profitability, we more fully describe the segment expenses per financial statement line item. Financial and statistical data is also included here. This section includes forward-looking statements regarding our view of 2017. When providing forward-looking statements on future expectations, we will provide the impact of Virgin America as a separate component of expected changes from 2016. Virgin America was acquired on December 14, 2016 and plays a significant role in the year-over-year change. Further information about the acquisition of Virgin America can be found in Note 2 to the consolidated financial statements.

• Liquidity and Capital Resources—an overview of our financial position, analysis of cash flows, sources and uses of cash, contractual obligations and commitments and off-balance sheet arrangements.

• Critical Accounting Estimates—a discussion of our accounting estimates that involve significant judgment and uncertainties.

YEAR IN REVIEW

On December 14, 2016 we completed our acquisition of Virgin America, becoming the fifth largest U.S. airline. The combined company now offers nearly 1,200 daily flights to 118 destinations across the United States, Mexico, Canada, Costa Rica and Cuba, with more nonstop destinations from the West Coast than any other airline. By combining loyalty programs and networks, along with our award-winning customer service and the expansion of our international partner portfolio, we believe we will provide greater benefits for our guests and become known as the premier airline for people on the West Coast.

In 2016, we posted our thirteenth consecutive annual profit on an adjusted basis, which is a testament to the hard work of our people and the successful execution of our strategic initiatives. Our 2016 pretax income as reported was $1.3 billion, an increase of 3% over 2015. Our 2016 pretax income on an adjusted basis (a non-GAAP financial measure) was $1.4 billion, an increase of 8% over 2015. The adjusted pretax income reflects the exclusion of $117 million of merger-related costs associated with our acquisition of Virgin America and $13 million of mark-to-market fuel hedge adjustments.

The improvement in adjusted pretax income was driven by an increase of $333 million in revenues and a decrease of $123 million in fuel costs. These benefits were partially offset by an increase in operating expenses, excluding fuel and special items, of $320 million, or 10%, to support the increased capacity of 11%. This increase reflects the addition of Virgin America capacity from the acquisition date through December 31, 2016.

The growth in revenues of $333 million was driven by the growth in our business and the inclusion of Virgin America in our results for the period from December 14, 2016 through December 31, 2016. On a combined basis, we launched 17 new markets in 2016 and, in January 2017, we launched historic flights to Havana, Cuba from Los Angeles. On the regional side of our business, we anticipate the delivery of Horizon's Embraer E175 regional jet this spring—the first of an order of 33 placed in early 2016. Our network is rapidly expanding with these regional aircraft and the recent acquisition of Virgin America. We believe we have a strong future ahead of us and look forward to the many new opportunities our combined networks will bring our company.

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See “Results of Operations” below for further discussion of changes in revenues and operating expenses and our reconciliation of Non-GAAP measures to the most directly comparable GAAP measure.

Accomplishments and Highlights

Acquisition of Virgin America Inc.

• Air Group completed its acquisition of Virgin America Inc. ("Virgin America") on December 14, 2016.

• Results for 2016 include the results of operations and cash flows for Virgin America from December 14, 2016 through December 31, 2016, including the impact of purchase accounting. Periods presented prior to the acquisition date do not include Virgin America's results.

Dividend Increase

• Announced a 9% increase in the quarterly dividend, from $0.275 per share to $0.30 per share in February 2017. This is the fourth time we have raised the dividend since initiating the quarterly dividend in July 2013, with a cumulative increase of 200% since that time.

Financial Highlights

• Reported full-year net income under Generally Accepted Accounting Principles ("GAAP") of $814 million, or $6.54 per diluted share. These results compared to full year 2015 net income of $848 million, or $6.56 per diluted share.

• Reported full-year 2016 net income, excluding special items, of $911 million, an 8%increase from 2015, and adjusted diluted earnings per share of $7.32, a 12%increase from 2015.

• Paid $0.275 per-share quarterly cash dividend in the fourth quarter, bringing total dividend payments in 2016 to $136 million.

• Generated approximately $1.4 billion of operating cash flow and $708 million of free cash flow in 2016.

• Grew passenger revenues by 4% compared to full-year 2015.

• Generated full-year adjusted pretax margin of 24% in 2016, in line with 2015.

• Lowered consolidated unit costs, excluding fuel and special items, for the seventh consecutive year, to the lowest level ever. Mainline unit costs excluding fuel and special items have declined 14 of the last 15 years.

• Held $1.6 billion in unrestricted cash and marketable securities as of December 31, 2016.

Recognition and Awards—Alaska

• Became the first major U.S. airline to receive approval from the Federal Aviation Administration for its Safety Management System.

• Ranked best airline in the U.S. by the Wall Street Journal's "2016 Airline Scorecard" for the fourth year in a row.

• Ranked highest in customer satisfaction among traditional carriers in North America in 2016 by J.D. Power and Associates for the ninth year in a row.

• Ranked highest in customer satisfaction with airline loyalty rewards programs in 2016 by J.D. Power and Associates for the third consecutive year.

• Ranked first in the U.S. News & World Report's list of Best Airline Rewards Programs for the second consecutive year.

• Ranked among Forbes' 2016 "America's Best Employers."

• Named No. 1 on-time carrier in North America for the seventh year in a row by FlightStats in January 2017.

• Received the Department of Defense 2016 Freedom Award, the highest recognition given to employers by the U.S. government for their support of National Guard and Reserve members.

• Received 15th Diamond Award of Excellence from the Federal Aviation Administration, recognizing both Alaska and Horizon's aircraft technicians for their commitment to training.

• Ranked first in the commercial aviation division and first place overall at the 2016 Annual International Aerospace Maintenance Competition, surpassing over 50 teams from around the world.

• Named the No. 1 cargo carrier by Logistics Management magazine as part of its annual Quest for Quality awards.

• Joined Standard and Poor's 500 Index. Companies included in the S&P 500 are chosen by the S&P Index Committee based on their size, earnings history and liquidity, among other factors.

• Ranked among the Fortune 500 for the third year in a row.

• Ranked among the top "green companies" in the United States by Newsweek.

• Ranked among the top 100 socially just companies in the United States by Forbes.

• Received the Seattle-Tacoma International Airport Green Gateway Environmental Excellence Award for the second year in a row, as a result of efforts in reducing emissions, recycling and waste reduction and lowered energy consumption.

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Recognition and Awards—Virgin America

• Rated Best U.S. Airline by Conde Nast Traveler in their "Annual Readers' Choice Awards" for nine years in a row.

• Ranked Best Domestic Airline in Travel + Leisure "World's Best Awards" for nine years in a row.

• Rated the number one carrier in the 2016 Airline Quality Report for the fourth consecutive year, an annual analysis of airline performance metrics conducted by Wichita State University and Embry-Riddle Aeronautical University.

• Rated "Best Airline in North America" for the second year in a row and "Best Low-Cost Airline in the U.S." for the seventh year in a row by Skytrax World Airline Awards.

Our People

• Awarded a record $159 million in incentive pay to employees for 2016, including $32 million earned by Virgin America employees in 2016 prior to the acquisition.

• Reached a tentative agreement with Alaska's aircraft technicians on a new collective bargaining agreement.

• Alaska received a perfect score of 100% for workplace equality on the 2017 Corporate Equality Index ("CEI"). Virgin America received a score of 95%.

Our Guests and Product

• Announced enhanced benefits to the Alaska Airlines Visa Signature credit card and the Alaska Airlines Visa Business credit card including the elimination of foreign transaction fees and increased bonus miles.

• Announced a new codeshare agreement and frequent flyer partnership with Japan Airlines, providing Alaska guests seamless travel and mileage earning opportunities.

• Launched premium class service on Alaska, including more legroom, complimentary alcoholic beverages and premium snacks.

• Flew the first three commercial flights using sustainable alcohol-to-jet biofuel made from U.S. grown corn and alternative jet fuel made from forest residuals, continuing Alaska's commitment to reduce its carbon emissions.

• Placed order for 33 firm Embraer 175 ("E175") regional jets and 30 options, to be flown by subsidiary Horizon Air, with first delivery scheduled in 2017.

• Added 19 Boeing 737-900ERs aircraft to the operating fleet in 2016, bringing the total fleet to 155 Boeing aircraft.

• Added 5 Airbus A320 aircraft to Virgin America's fleet in 2016, bringing the total fleet to 63 Airbus aircraft.

• Added 17 new markets in 2016 across the Alaska Air Group and Virgin America networks.

• Increased fuel efficiency (as measured by seat-miles per gallon) by 1.4% over 2015.

Our Communities

• Donated nearly $13 million to support nonprofits in our local communities, focusing on youth & education, medical (research/transportation) and community outreach.

Shareholder Return

In 2016, we paid cash dividends of $136 million and repurchased approximately 3 million shares of our common stock for $193 million under the $1 billion share repurchase program authorized by our Board of Directors. In the second quarter of 2016, we paused our share repurchases in advance of the acquisition of Virgin America. Since 2007, we have repurchased 59 million shares of common stock for $1.5 billion for an average price of approximately $25.90 per share. In 2016, we increased our quarterly dividend 38% from $0.20 per share to $0.275 per share, and, subsequent to December 31, 2016, we announced a 9% increase to $0.30 per share. Overall, we returned $329 million to shareholders during 2016. We expect to continue to return capital to shareholders in 2017, primarily in the form of dividends.

Outlook

We completed the acquisition of Virgin America on December 14, 2016, positioning us as the fifth largest airline in the U.S., with an unparalleled ability to serve West Coast travelers. The acquisition of Virgin America provides a platform for growth of our low-fare, premium product, a powerful West Coast network for our guests and enhanced international partnerships. Additionally, Virgin America provides access to constrained gates, particularly on the East Coast, creating increased utility for our guests.

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In 2017 and beyond, we are focused on the successful integration of Virgin America with Alaska Air Group, while continuing to work towards obtaining a Single Operating Certificate ("SOC"). We currently expect to receive an SOC in early 2018. Our priority throughout the integration process is to run two great airlines and maintain a safe and compliant operation, while providing a great experience for our guests. Additionally, we are particularly focused on merging the cultures and brands that have made Alaska and Virgin America respected and trusted over the years by our guests. We intend to minimize any disruption to our guests during our integration efforts by being transparent about the progress we are making and how the changes may affect them. Employee engagement throughout the integration will remain a top priority as well, ensuring that employees remain engaged, informed and excited about the new Alaska Air Group. We plan to bring our teams together through workshops and trainings delivered throughout 2017. Additionally, we will remain focused on capturing the value and synergies created by combining these two great companies.

In addition to our integration with Virgin America, one of our biggest initiatives is the launch of our new "Premium Class" service on our B737 aircraft, which provides greater leg room, priority boarding and complimentary cocktails, among other benefits. Premium Class was rolled out in early January 2017 and, so far, the results are exceeding our expectations in both guest response and revenue generation.

Currently, we expect to grow our combined network capacity in 2017 by approximately 8.5%. The growth rate compares 2017 system-wide capacity with historical Air Group and Virgin America combined capacity in 2016. This compares to a 10.2% combined growth in 2016 on the same basis. Current schedules indicate competitive capacity will be 5 points higher in the first quarter of 2017. We believe that our product, our operation, our engaged employees, our award-winning service, and our competitive Mileage Plan™ and Elevate® programs, combined with our strong balance sheet, give us the ability to compete vigorously in our markets.

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RESULTSOF OPERATIONS

ADJUSTED (NON-GAAP) RESULTS ANDPER-SHARE AMOUNTS

We believe disclosure of earnings excluding the impact of merger-related costs, mark-to-market gains or losses or other individual special revenues or expenses is useful information to investors because:

• By eliminating fuel expense and certain special items (including merger-related costs) from our unit metrics, we believe that we have better visibility into the results of operations and our non-fuel cost-reduction initiatives. Our industry is highly competitive and is characterized by high fixed costs, so even a small reduction in non-fuel operating costs can lead to a significant improvement in operating results. In addition, we believe that all domestic carriers are similarly impacted by changes in jet fuel costs over the long run, so it is important for management (and thus investors) to understand the impact of (and trends in) company-specific cost drivers, such as labor rates and productivity, airport costs, maintenance costs, etc., which are more controllable by management.

• Cost per ASM ("CASM") excluding fuel and certain special items, such as merger-related costs, is one of the most important measures used by management and by the Air Group Board of Directors in assessing quarterly and annual cost performance.

• Adjusted income before income tax and CASM excluding fuel (and other items as specified in our plan documents) are important metrics for the employee incentive plan, which covers the majority of Air Group employees.

• CASM excluding fuel and certain special items is a measure commonly used by industry analysts and we believe it is the basis by which they compare our airlines to others in the industry. The measure is also the subject of frequent questions from investors.

• Disclosure of the individual impact of certain noted items provides investors the ability to measure and monitor performance both with and without these special items. We believe that disclosing the impact of certain items, such as merger-related costs and mark-to-market hedging adjustments, is important because it provides information on significant items that are not necessarily indicative of future performance. Industry analysts and investors consistently measure our performance without these items for better comparability between periods and among other airlines.

• Although we disclose our passenger unit revenues, we do not (nor are we able to) evaluate unit revenues excluding the impact that changes in fuel costs have had on ticket prices. Fuel expense represents a large percentage of our total operating expenses. Fluctuations in fuel prices often drive changes in unit revenues in the mid-to-long term. Although we believe it is useful to evaluate non-fuel unit costs for the reasons noted above, we would caution readers of these financial statements not to place undue reliance on unit costs excluding fuel as a measure or predictor of future profitability because of the significant impact of fuel costs on our business.

Although we are presenting these non-GAAP amounts for the reasons above, investors and other readers should not necessarily conclude that these amounts are non-recurring, infrequent, or unusual in nature.

2016 COMPARED WITH 2015

Our consolidated net income for 2016 was $814 million, or $6.54 per diluted share, compared to net income of $848 million, or $6.56 per diluted share, in 2015. Our financial results include results of Virgin America for the period from December 14, 2016 through December 31, 2016 and the impact of purchase accounting as of December 14, 2016. Refer to the "Critical Accounting Estimates" section for further information regarding purchase accounting.

Excluding the impact of merger-related costs, mark-to-market fuel hedge adjustments and other special items, our adjusted consolidated net income for 2016 was $911 million, or $7.32 per diluted share, compared to an adjusted consolidated net income of $842 million, or $6.51 per share, in 2015. The following tables reconcile our adjusted net income and earnings per diluted share ("EPS") during the full year 2016 and 2015 to amounts as reported in accordance with GAAP.

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	Twelve Months Ended December 31,
	2016						2015
(in millions, except per-share amounts)	Dollars			Diluted EPS			Dollars			Diluted EPS
Reported GAAP net income and diluted EPS	$	814		$	6.54		$	848		$	6.56
Mark-to-market fuel hedge adjustments	(13		)	(0.11		)	—			—
Special items—merger-related costs and other(a)	117			0.94			32			0.25
Income tax effect on special items(b)	(24		)	(0.19		)	(12		)	(0.10		)
Special tax (benefit)/expense(c)	17			0.14			(26		)	(0.20		)
Non-GAAP adjusted net income and diluted EPS	$	911		$	7.32		$	842		$	6.51

(a) Refer to Note 11 to the consolidated financial statement for the description of special items.

(b) Certain merger-related costs are non-deductible for tax purposes, resulting in a smaller income tax effect for current year adjusting items.

(c) Special tax (benefit)/expense represents the discrete impacts of adjustments to our position on income sourcing in various states.

CASM is summarized below:

	Twelve Months Ended December 31,
	2016			2015			% Change
Consolidated:
Total CASM		10.38	¢		10.77	¢	(3.6	)
Less the following components:
Aircraft fuel, including hedging gains and losses	1.88			2.39			(21.3	)
Special items—merger-related costs and other(a)	0.27			0.08			237.5
CASM, excluding fuel and special items		8.23	¢		8.30	¢	(0.8	)
Mainline:
Total CASM		9.39	¢		9.77	¢	(3.9	)
Less the following components:
Aircraft fuel, including hedging gains and losses	1.79			2.29			(21.8	)
Special items—merger-related costs and other(a)	0.30			0.09			233.3
CASM, excluding fuel and special items		7.30	¢		7.39	¢	(1.2	)

(a) Refer to Note 11 to the consolidated financial statement for the description of special items.

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OPERATING STATISTICS SUMMARY (unaudited)

Alaska Air Group, Inc.

Below are operating statistics we use to measure performance. Consolidated and Mainline amounts presented below include Virgin America data for the period December 14, 2016 through December 31, 2016. We often refer to unit revenues and adjusted unit costs, which is a non-GAAP measure.

	Twelve Months Ended December 31,
	2016	2015	Change	2014	Change
Consolidated Operating Statistics:(a)
Revenue passengers (000)	34,289	31,883	7.5%	29,278	8.9%
RPMs (000,000) "traffic"	37,209	33,578	10.8%	30,718	9.3%
ASMs (000,000) "capacity"	44,135	39,914	10.6%	36,078	10.6%
Load factor	84.3%	84.1%	0.2 pts	85.1%	(1.0) pts
Yield	13.45¢	14.27¢	(5.7)%	14.91¢	(4.3)%
PRASM	11.34¢	12.01¢	(5.6)%	12.69¢	(5.4)%
RASM	13.44¢	14.03¢	(4.2)%	14.88¢	(5.7)%
CASM excluding fuel and special items(b)	8.23¢	8.30¢	(0.8)%	8.36¢	(0.7)%
Economic fuel cost per gallon(b)	$1.52	$1.88	(19.1)%	$3.08	(39.0)%
Fuel gallons (000,000)	554	508	9.1%	469	8.3%
ASM's per gallon	79.7	78.6	1.4%	76.9	2.2%
Average number of full-time equivalent employees (FTEs)	14,760	13,858	6.5%	12,739	8.8%
Mainline Operating Statistics:
Revenue passengers (000)	24,838	22,869	8.6%	20,972	9.0%
RPMs (000,000) "traffic"	33,489	30,340	10.4%	27,778	9.2%
ASMs (000,000) "capacity"	39,473	35,912	9.9%	32,430	10.7%
Load factor	84.8%	84.5%	0.3 pts	85.7%	(1.2) pts
Yield	12.24¢	12.98¢	(5.7)%	13.58¢	(4.4)%
PRASM	10.38¢	10.97¢	(5.4)%	11.64¢	(5.8)%
CASM excluding fuel and special items(b)	7.30¢	7.39¢	(1.2)%	7.45¢	(0.8)%
Economic fuel cost per gallon(b)	$1.52	$1.87	(18.7)%	$3.07	(39.1)%
Fuel gallons (000,000)	474	439	8.0%	407	7.9%
ASM's per gallon	83.3	81.8	1.8%	79.7	2.6%
Average number of FTEs	11,447	10,750	6.5%	9,910	8.5%
Aircraft utilization	10.5	10.8	(2.8)%	10.5	2.9%
Average aircraft stage length	1,225	1,195	2.5%	1,182	1.1%
Mainline operating fleet at period-end	218 a/c	147 a/c	71 a/c	137 a/c	10 a/c
Regional Operating Statistics:(c)
Revenue passengers (000)	9,452	9,015	4.8%	8,306	8.5%
RPMs (000,000) "traffic"	3,720	3,238	14.9%	2,940	10.1%
ASMs (000,000) "capacity"	4,662	4,002	16.5%	3,648	9.7%
Load factor	79.8%	80.9%	(1.1) pts	80.6%	0.3 pts
Yield	24.42¢	26.37¢	(7.4)%	27.40¢	(3.8)%
PRASM	19.49¢	21.34¢	(8.7)%	22.08¢	(3.4)%

(a) Except for FTEs, data includes information related to regional CPA flying with Horizon, SkyWest and PenAir.

(b) See reconciliation of this measure to the most directly related GAAP measure in the "Results of Operations" section.

(c) Data presented includes information related to regional CPAs.

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OPERATING REVENUES

Total operating revenues increased$333 million, or 6%, during 2016 compared to the same period in 2015.  The changes are summarized in the following table:

	Twelve Months Ended December 31,
(in millions)	2016		2015		% Change
Passenger
Mainline	$	4,098	$	3,939	4
Regional	908		854		6
Total passenger revenue	$	5,006	$	4,793	4
Freight and mail	108		108		—
Other—net	817		697		17
Total operating revenues	$	5,931	$	5,598	6

Passenger Revenue—Mainline

Mainline passenger revenue for 2016increased by 4% due to a 9.9%increase in capacity, partially offset by a 5.4%decrease in PRASM compared to 2015. The increase in capacity was driven by new routes and growth in our operating fleet. Virgin America capacity from the acquisition date through December 31, 2016 represented approximately 2 points of capacity increase from 2015. The decrease in PRASM was driven by a decrease of 5.7% in ticket yield due to competitive pressures and our own growth, offset by a slight increase in load factor. Furthermore, the decline in fuel prices over the last year has contributed to lower ticket prices.

We expect competitive pressures on unit revenues to continue into 2017. However, given our projected capacity growth, we expect total passenger revenue will increase from 2016 on a combined comparative basis that includes full 2016 capacity of Virgin America.

Passenger Revenue—Regional

Regional passenger revenue increased by $54 million, or 6%, compared to 2015 due to a 16.5%increase in capacity, partially offset by an 8.7%decrease in PRASM compared to 2015. The increase in capacity is due to an increase in departures from new E175 deliveries, an increase in average aircraft stage length and the annualization of new routes introduced over the past twelve months. The decrease in PRASM was due to a 7.4%decrease in ticket yield, as well as a decrease in load factor of 1.1 points. The decrease in yield was due to an increase in competitive capacity in our regional markets and our own growth as we strengthen our network utility in the Pacific Northwest, as well as an increase in the average trip length of our regional flights.

We expect Regional passenger revenue to increase in 2017, primarily due to the delivery and placement into service of 18 E175s and the annualization of new routes introduced in 2016.

Other—Net

Other—net revenue increased$120 million, or 17%, from 2015, primarily due to increases in Mileage Plan™ revenue. Mileage Plan™ revenue increased $100 million or 30%, due to increased miles sold and improved compensation terms with our Mileage Plan™ affinity credit card partner as a result of a contract extension which became effective January 1, 2016. Additionally, Mileage Plan™ revenue earned from our partner airlines increased as compared to the prior year.

We expect our Other—net revenue to experience an increase, on a year over year basis, at a pace higher than the expected increase in passengers in 2017, due to growth in the Mileage Plan™ program as we introduce Virgin America Elevate® members to the program, as well as continued organic growth amongst new and existing customers.

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OPERATING EXPENSES

Total operating expenses increased$282 million, or 7%, compared to 2015, primarily as a result of higher wages and benefits and $117 million of merger-related costs, partially offset by lower fuel costs. We believe it is useful to summarize operating expenses as follows, which is consistent with the way expenses are reported internally and evaluated by management:

	Twelve Months Ended December 31,
(in millions)	2016		2015		% Change
Fuel expense	$	831	$	954	(13	)
Non-fuel expenses	3,634		3,314		10
Special items—merger-related costs and other	117		32		266
Total Operating Expenses	$	4,582	$	4,300	7

Significant operating expense variances from 2015 are more fully described below.

Wages and Benefits

Wages and benefits increased during 2016 by $128 million, or 10%, compared to 2015. The primary components of wages and benefits are shown in the following table:

	Twelve Months Ended December 31,
(in millions)	2016		2015		% Change
Wages	$	1,022	$	945	8
Medical and other benefits	192		153		25
Defined contribution plans	67		60		12
Pension—Defined benefit plans	25		28		(11	)
Payroll taxes	76		68		12
Total wages and benefits	$	1,382	$	1,254	10

Wages increased8% on a 6.5% increase in FTEs. The increase in wages was primarily attributable to FTE growth to support expansion of our business and an increase in the average wages per employee.

Medical and other benefits increased25% compared to the prior year. The increase is primarily due to an increase in the number of employees and high-cost medical claims.

Defined contribution plans increased12% due to FTE growth and increased participation throughout all labor groups.

Pension expense decreased11%, compared to the same period in the prior year. The decrease is due to a change in several assumptions used at December 31, 2015, including a higher discount rate, updated retirement age assumptions, future salary increase assumptions and others that resulted in lower expense recognition in 2016.

We expect wages and benefits to be 30% to 35% higher in 2017 compared to 2016. The impact of Virgin America is approximately three quarters of the increase. The remainder is the expected growth in FTEs to support our capacity growth, along with higher wages, pension costs and medical costs.

Variable Incentive Pay

Variable incentive pay expense increased to $127 million in 2016 from $120 million in 2015. The increase is due to a higher wage base.

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Aircraft Fuel

Aircraft fuel expense includes both raw fuel expense (as defined below) and the effect of mark-to-market adjustments to our fuel hedge portfolio included in our consolidated statement of operations as the value of that portfolio increases and decreases. Aircraft fuel expense can be volatile, even between quarters, because it includes these gains or losses in the value of the underlying instrument as crude oil prices and refining margins increase or decrease. Raw fuel expense is defined as the price that we generally pay at the airport, or the “into-plane” price, including taxes and fees. Raw fuel prices are impacted by world oil prices and refining costs, which can vary by region in the U.S.  Raw fuel expense approximates cash paid to suppliers and does not reflect the effect of our fuel hedges.

Aircraft fuel expense decreased$123 million, or 13% compared to 2015. The elements of the change are illustrated in the following table: 

	Twelve Months Ended December 31,
	2016						2015
(in millions, except for per gallon amounts)	Dollars			Cost/Gal			Dollars		Cost/Gal
Raw or "into-plane" fuel cost	$	828		$	1.49		$	935	$	1.84
Losses on settled hedges	16			0.03			19		0.04
Consolidated economic fuel expense	$	844		$	1.52		$	954	$	1.88
Mark-to-market fuel hedge adjustments	(13		)	(0.02		)	—		—
GAAP fuel expense	$	831		$	1.50		$	954	$	1.88
Fuel gallons	554						508

Fuel gallons consumed increased 9.1% on our consolidated 10.6% increase in capacity, partially offset by a 1.4% improvement in fuel efficiency as measured by consolidated ASMs per gallon.

The raw fuel price per gallon decreased 19% as a result of lower West Coast jet fuel prices. West Coast jet fuel prices are impacted by the price of crude oil and the refining margins associated with the conversion of crude oil to jet fuel. The decrease in raw fuel price per gallon during 2016 was due to a decline in crude oil prices of 11% and a decrease in refining margins of 36%, when compared to the prior year.

We also evaluate economic fuel expense, which we define as raw fuel expense adjusted for the cash we receive from, or pay to, hedge counterparties for hedges that settle during the period, and for the premium expense that we paid for those contracts. A key difference between aircraft fuel expense and economic fuel expense is the timing of gain or loss recognition on our hedge portfolio. When we refer to economic fuel expense, we include gains and losses only when they are realized for those contracts that were settled during the period based on their original contract terms. We believe this is the best measure of the effect that fuel prices are currently having on our business because it most closely approximates the net cash outflow associated with purchasing fuel for our operations. Accordingly, many industry analysts evaluate our results using this measure, and it is the basis for most internal management reporting and incentive pay plans.

Losses recognized for hedges that settled during the year were $16 million in 2016, compared to losses of $19 million in 2015. These amounts represent cash paid for premium expense, offset by any cash received from those hedges at settlement.

As of the date of this filing we expect our economic fuel price per gallon to increase approximately 39% in the first quarter of 2017 as compared to the first quarter of 2016 of Air Group as reported due to higher crude oil prices and refining margins. As both oil prices and refining margins are volatile, we are unable to forecast the full-year cost with any certainty.

Aircraft Maintenance

Aircraft maintenance costs increased by $17 million, or 7%, compared to the prior year. Maintenance costs increased primarily due to more engine and airframe events than in 2016. Additionally, in the prior year we received vendor credits, which offset expense, for engine maintenance that had been previously completed on the B737 fleet.

We expect aircraft maintenance to be approximately 50% to 55% higher in 2017 compared to 2016. The impact of Virgin America represents approximately three quarters of the increase. For Alaska, we expect an increase in engine maintenance costs primarily for our 737-800 aircraft, as we anticipate entering into a power-by-the-hour maintenance arrangement.

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Aircraft Rent

Aircraft rent expense increased by $9 million, or 9%, compared to the prior year, primarily due the addition of the rent expense on the 53 Airbus aircraft leased by Virgin America for the period from December 14, 2016 to December 31, 2016.

We expect aircraft rent to be approximately 140% to 145% higher in 2017 compared to 2016 due to the full-year impact of the 53 leased Airbus aircraft, partially offset by a reduction in the number of leased B737-400 aircraft.

Landing Fees and Other Rentals

Landing fees and other rental expenses increased $24 million, or 8%, primarily due to increased flying in 2016, as we increased capacity and entered new markets.

We expect landing fees and other rental expenses to increase approximately 50% to 55% in 2017 with Virgin America representing about three quarters of the increase. The remainder of the increase relates to our expected capacity growth and rate increases at airports across our network.

Contracted Services

Contracted services increased$33 million, or 15%, when compared to 2015. The increase is primarily due to increased flying at stations where we use vendors to assist us. Additionally, wage rates for our vendor employees have increased due in part to higher minimum wage laws in many locations we serve. We also had several information technology and facilities projects that required contracted support.

We expect contracted services to be 50% to 55% higher in 2017 compared to 2016, primarily due to the addition of Virgin America, as well as the additional contracted services to be incurred as the companies are integrated.

Selling Expenses

Selling expenses increased by $14 million, or 7%, compared to 2015, mostly due to increased promotional and advertising activities, as well as new sponsorships which became effective in the current year.

We expect selling expense to increase approximately 65% to 70% in 2017 compared to 2016 primarily due to the addition of Virgin America.

Depreciation and Amortization

Depreciation and amortization expenses increased by $43 million, or 13%, compared to 2015. The increase is primarily due to the addition of 19 900ERs to our fleet since December 31, 2015, partially offset by a change in the estimated useful lives of certain B737 operating aircraft and related parts from 20 years to 25 years, which was effective October 1, 2016.

We expect depreciation and amortization expense to remain relatively flat in 2017 compared to 2016. The impact of Virgin America and newly delivered aircraft in 2017 is expected to be offset by a full year impact of the change in accounting estimate for useful lives mentioned previously.

Food and Beverage Service

Food and beverage service expenses increased by $13 million, or 12%, due to the increased number of passengers and upgrades to our onboard menu, offering higher quality food and beverage products.

We expect food and beverage expenses to increase 40% to 45% in 2017, primarily due to the acquisition of Virgin America.

Third-party regional carrier expense

Third-party regional carrier expense, which represents payments made to SkyWest and PenAir under our CPA agreements, increased$23 million, or 32%, in 2016 compared to 2015. The increase is primarily due to the significant increase in regional capacity in 2016 through the introduction of E175 flying.

We expect third-party regional carrier expense to increase in 2017 as we continue to expand our regional network.

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Other Operating Expenses

Other operating expenses increased$9 million, or 3%, compared to 2015.  The increase is primarily due to increases in property and other taxes, personnel costs for our flight crews and an increase in fines and penalties.

We expect other operating expenses to increase approximately 50% to 55% in 2017 compared to 2016. The impact of Virgin America represents approximately half of the increase, while the other half is driven by IT and facilities-related projects.

Special Items—Merger-Related Costs and Other

We recorded special items of $117 million for merger-related costs associated with our acquisition of Virgin America. These costs consisted primarily of legal expenses, investment banking fees and severance costs. We expect to continue to incur merger-related costs in 2017. Our 2015 special items of $32 million consisted of a non-cash pension settlement expense and costs related to ongoing litigation.

Consolidated Nonoperating Income (Expense)

During 2016 we recorded nonoperating expense of $4 million, compared to nonoperating income of $14 million in 2015. In the current year, we incurred more interest expense associated with the financing obtained to fund the acquisition of Virgin America. This expense was partially offset by additional interest income earned during the period we held those funds in advance of the acquisition close date.

Additional Segment Information

Refer to Note 13 of the consolidated financial statements for a detailed description of each segment. Below is a summary of each segment's profitability.

Mainline

Pretax profit for Mainline was $1.3 billion in 2016 compared to $1.2 billion in 2015. This segment includes financial results of Virgin America from the date of acquisition through December 31, 2016. The $135 million increase is due to an increase in operating revenues of $277 million, offset by an increase in operating expenses of $126 million. Revenue growth was primarily driven by the $159 million increase in passenger revenues and the $100 million increase in Mileage Plan™ revenue, both described previously. Growth in operating expenses was due to higher wages to support our network growth, higher ramp and passenger handling due to increased flying and higher wage rates at stations where we use vendors to assist us, higher depreciation related to our fleet growth, and higher selling expenses related to increased advertising. Economic fuel cost, as defined above, decreased due to lower raw fuel costs and increased fuel efficiency, slightly offset by an 8% increase in consumption.

Regional

Pretax profit for Regional was $93 million in 2016 compared to $105 million in 2015. The $12 million decrease in pretax profit was driven by a $74 million increase in non-fuel operating expenses in the current year to support additional departures, partially offset by a $56 million increase in revenue and an $6 million decrease in fuel expense when compared to the prior year period.

Horizon

Pretax profit for Horizon was $14 million in 2016 compared to $28 million in 2015. CPA Revenues (100% of which are from Alaska and are eliminated in consolidation) increased due to additional capacity added in the last 12 months. The $32 million increase in Horizon's non-fuel operating expenses was largely driven by higher medical costs due to an increased number of large medical claims, increased volume of engine overhaul and heavy airframe work, employee signing bonuses and overhead restructuring costs.

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2015 COMPARED WITH 2014

Our consolidated net income for 2015 was $848 million, or $6.56 per diluted share, compared to net income of $605 million, or $4.42 per diluted share, in 2014.

Excluding the impact of mark-to-market fuel hedge adjustments and special items, our adjusted consolidated net income for 2015 was $842 million, or $6.51 per diluted share, compared to an adjusted consolidated net income of $571 million, or $4.18 per share, in 2014.

	Twelve Months Ended December 31,
	2015						2014
(in millions, except per-share amounts)	Dollars			Diluted EPS			Dollars			Diluted EPS
Reported GAAP net income and diluted EPS	$	848		$	6.56		$	605		$	4.42
Mark-to-market fuel hedge adjustments	—			—			(23		)	(0.16		)
Special items	32			0.25			$	(30	)	$	(0.22	)
Income tax effect of special items	(12		)	(0.10		)	19			0.14
Special income tax benefit(a)	(26		)	(0.20		)	—			—
Non-GAAP adjusted net income and diluted EPS	$	842		$	6.51		$	571		$	4.18

(a) Special tax benefit represents the discrete impacts of adjustments to our position on income sourcing in various states.

Our operating costs per ASM are summarized below:

	Twelve Months Ended December 31,
	2015			2014			% Change
Consolidated:
Total operating expenses per ASM (CASM)		10.77	¢		12.21	¢	(11.8	)
Less the following components:
Aircraft fuel, including hedging gains and losses	2.39			3.93			(39.2	)
Special items	0.08			(0.08		)	NM
CASM, excluding fuel and special items		8.30	¢		8.36	¢	(0.7	)
Mainline:
Total operating expenses per ASM (CASM)		9.77	¢		11.15	¢	(12.4	)
Less the following components:
Aircraft fuel, including hedging gains and losses	2.29			3.79			(39.6	)
Special items	0.09			(0.09		)	NM
CASM, excluding fuel and special items		7.39	¢		7.45	¢	(0.8	)

NM—Not meaningful

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OPERATING REVENUES

Total operating revenues increased$230 million, or 4%, during 2015 compared to the same period in 2014. The changes are summarized in the following table:

	Twelve Months Ended December 31,
(in millions)	2015		2014		% Change
Passenger
Mainline	$	3,939	$	3,774	4
Regional	854		805		6
Total passenger revenue	$	4,793	$	4,579	5
Freight and mail	108		114		(5	)
Other—net	697		675		3
Total operating revenues	$	5,598	$	5,368	4

Passenger Revenue—Mainline

Mainline passenger revenue for 2015increased by 4% on a 10.7% increase in capacity, partially offset by a 5.8% decrease in PRASM compared to 2014. The increase in capacity was driven by new routes, larger aircraft added to our fleet and increased utilization of our aircraft. The decrease in PRASM was driven by a 4.4% decrease in ticket yield, combined with a 1.2-point decrease in load factor compared to the prior year. The decline in ticket yield was primarily due to increased competitive capacity in the markets we serve and our own growth. Yield was further impacted by a significant decline in fuel prices, which has a direct impact on ticket pricing. The decline in load factor was also a result of increased capacity.

Passenger Revenue—Regional

Regional passenger revenue increased by $49 million, or 6%, compared to 2014 due to a 9.7% increase in capacity, partially offset by a 3.4% decrease in PRASM compared to 2014. The increase in capacity was due to an increase in departures and average aircraft stage length. The decrease in PRASM was due to a 3.8% decrease in ticket yield, partially offset by an increase in load factor of 0.3 points. The decline in yield was due to an increase in competitive capacity in our regional markets and our own growth as we strengthen our network utility in the Pacific Northwest.

Other—Net

Other—net revenue increased$22 million, or 3%, from 2014, due to increases in Mileage Plan™ revenue and food and beverage sales, partially offset by lower bag fee revenues. Mileage Plan™ revenue increased $34 million or 12%, due to increased miles sold. Food and beverage sales were higher due to the 8.9% increase in passengers and selling more premium offerings, such as Tom Douglas signature meals. Bag fee revenue was lower due to promotions launched in 2015 to offer a free first checked bag to our Alaska Airlines Signature Visa credit card holders. This decline was partially offset by incremental revenue from our affinity card bank partner.

OPERATING EXPENSES

Total operating expenses decreased $106 million, or 2%, compared to 2014, primarily as a result of lower fuel costs.

	Twelve Months Ended December 31,
(in millions)	2015		2014			% Change
Fuel expense	$	954	$	1,418		(33	)
Non-fuel expenses	3,314		3,018			10
Special items	32		(30		)	NM
Total Operating Expenses	$	4,300	$	4,406		(2	)

Significant operating expense variances from 2014 are more fully described below.

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Wages and Benefits

Wages and benefits increased during 2015 by $118 million, or 10%, compared to 2014. The primary components of wages and benefits are shown in the following table:

	Twelve Months Ended December 31,
(in millions)	2015		2014		% Change
Wages	$	945	$	862	10
Medical and other benefits	153		150		2
Defined contribution plans	60		53		13
Pension—defined benefit plans	28		9		211
Payroll taxes	68		62		10
Total wages and benefits	$	1,254	$	1,136	10

Wages increased10%, primarily due to an 8.8% increase in FTEs and the annualization of new labor contracts that included higher rates. The increase in FTEs was to support the growth in our business.

Defined contribution plan expense increased 13% due to increased contributions throughout all labor groups and an increased matched percentage as a part of recent labor contracts.

Pension expense increased $19 million, compared to the same period in the prior year. The increase is due to higher amortization of actuarial losses from previous years due primarily to a lower discount rate used to value the pension obligation at December 31, 2014.

Variable Incentive Pay

Variable incentive pay expense increased to $120 million in 2015 from $116 million in 2014. The increase is due to actual results exceeding our targets for financial performance more so than in the prior year, coupled with a higher wage base.

Aircraft Fuel

Aircraft fuel expense decreased$464 million, or 33% compared to 2014. The elements of the change are summarized in the following table: 

	Twelve Months Ended December 31,
	2015				2014
(in millions, except for per gallon amounts)	Dollars		Cost/Gal		Dollars			Cost/Gal
Raw or "into-plane" fuel cost	$	935	$	1.84	$	1,400		$	2.99
Losses on settled hedges	19		0.04		41			0.09
Consolidated economic fuel expense	$	954	$	1.88	$	1,441		$	3.08
Mark-to-mark fuel hedge adjustments	—		—		(23		)	(0.05		)
GAAP fuel expense	$	954	$	1.88	$	1,418		$	3.03
Fuel gallons	508				469

Fuel gallons consumed increased 8.3% in line with the 10.6% increase capacity, partially offset by a 2.2% improvement in fuel efficiency as measured by ASMs per gallon.

The raw fuel price per gallon decreased 38.5% as a result of lower West Coast jet fuel prices. West Coast jet fuel prices are impacted by both the price of crude oil, as well as refining margins associated with the conversion of crude oil to jet fuel. The decrease in raw fuel price per gallon during 2015 was due to a decline in crude oil prices of 48% and a decrease in refining margins of 11%, when compared to the prior year.

Losses recognized for hedges that settled during the year were $19 million in 2015, compared to losses of $41 million in 2014. These amounts represent cash paid for premium expense, offset by any cash received from those hedges at settlement. The

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decrease in losses on settled hedges was primarily due to our increased use of "out of the money" call options as well as purchasing shorter-dated options, both of which reduce the premium cost we pay.

Aircraft Maintenance

Aircraft maintenance increased by $24 million, or 10%, compared to the prior year. Maintenance costs increased due to more scheduled engine maintenance events that were more expensive due to replacing life-limited parts and heavier airframe checks.

Landing Fees and Other Rentals

Landing fees and other rentals increased$17 million, or 6%, primarily due to increased flying in 2015 as we increased capacity and entered into new markets.

Selling Expenses

Selling expenses increased by $12 million, or 6%, compared to 2014, mostly due to increased promotional and advertising activities in Seattle and increased credit card commissions from higher revenue.

Contracted Services

Contracted services increased$18 million, or 9%, when compared to 2014. The increase is primarily due to increased flying at stations where we use vendors to assist us with passenger and ramp handling.

Depreciation and Amortization

Depreciation and amortization expenses increased by $26 million, or 9%, due to the increased number of aircraft in our fleet and cabin upgrades throughout 2014 and 2015.

Food and Beverage Service

Food and beverage service expenses increased by $20 million, or 22%, due to the increased number of passengers and upgrades to our onboard menu, offering higher quality food and beverage products.

Third-party regional carrier expense

Third-party regional carrier expense, which represents payments made to SkyWest and PenAir under our CPAs, increased$14 million, or 24%, in 2015 compared to 2014. The increase is primarily due to the five E175 aircraft operated by SkyWest added to our regional operation in 2015.

Other Operating Expenses

Other operating expenses increased$48 million, or 16%, compared to 2014.  The increase is primarily due to professional services with regard to our brand refresh and network strategy, personnel costs for our flight crews and IT-related costs.

Special Items

During 2015 we recorded special items of $32 million. This is due to a $14 million non-cash pension settlement expense recorded as a result of lump-sum payments made to terminated, vested participants which removed them from participation in the pension plan therefore reducing our outstanding liability, and an $18 million expense related to ongoing litigation.

Consolidated Nonoperating Income (Expense)

During 2015, we recorded nonoperating income of $14 million, compared to an expense of $13 million in 2014. In 2015, we capitalized more of our interest expense on an increasing balance of prepaid aircraft deposits.

Additional Segment Information

Refer to Note 13 of the consolidated financial statements for a detailed description of each segment. Below is a summary of each segments' profitability.

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Mainline

Pretax profit for Alaska Mainline was $1.2 billion in 2015 compared to $834 million in 2014. The $372 million increase is due to increased revenues of $188 million and decreased operating expenses of $192 million, slightly offset by a decrease in non-operating income of $8 million. Revenue growth was largely driven by the $165 million increase in Mainline passenger revenue described previously. Growth in operating expenses was due to higher wages to support our growth, higher ramp and passenger handling associated with increased flying, higher depreciation related to our fleet growth, and increased food and beverage costs. Economic fuel cost, as defined above, decreased due to lower raw fuel costs and increased fuel efficiency, slightly offset by an increase in consumption.

Regional

Pretax profit for Alaska Regional was $105 million in 2015 compared to $74 million in 2014. The $31 million increase is due to increased revenues of $43 million, offset by increased operating expense of $13 million. Revenue growth was driven by increased passenger revenue. Operating expenses were higher in 2015 to support additional departures.

Horizon

Pretax profit for Horizon was $28 million in 2015 compared to $17 million in 2014. The $11 million increase is due to increased CPA Revenues (100% of which are from Alaska and eliminated in consolidation) of $36 million, offset by increased non-fuel operating expenses of $26 million. The increase in Horizon's non-fuel operating expenses was largely driven by increased engine maintenance and other expenses to support the increase in capacity.

LIQUIDITY AND CAPITAL RESOURCES

Our primary sources of liquidity are:

• Our existing cash and marketable securities balance of $1.6 billion and our expected cash from operations;

• Our 52 unencumbered aircraft in the operating fleet as of December 31, 2016, that could be financed, if necessary; and

• Our combined $200 million bank line-of-credit facilities, with none currently outstanding.

On December 14, 2016 we completed the acquisition of Virgin America, paying $2.6 billion to stockholders and other equity holders of Virgin America. We funded the acquisition with cash on hand and approximately $2.0 billion of secured debt financing provided by multiple lenders. Approximately $1.6 billion of the loans obtained to fund the acquisition are secured by a total of 56 of Air Group's aircraft, including 37 B737-900ER aircraft and 19 B737-800 aircraft. The remainder is secured by Air Group's interest in certain aircraft purchase agreements. As a result, we have fewer unencumbered aircraft in our operating fleet than in prior periods, which could affect our ability to obtain future financing.

In 2016, we took delivery of 19 B737-900ER aircraft and made debt payments totaling $249 million. We also continued to return capital to our shareholders by paying dividends totaling $136 million and repurchasing $193 million of our common stock. Because of our strong balance sheet and financial performance, we are one of only three airlines in the U.S. with investment grade credit ratings.

We believe that our current cash and marketable securities balance combined with future cash flows from operations and other sources of liquidity will be sufficient to fund our operations and meet our debt payment obligations for the foreseeable future.

In our cash and marketable securities portfolio, we invest only in securities that meet our primary investment strategy of maintaining and securing investment principal. The portfolio is managed by reputable firms that adhere to our investment policy that sets forth investment objectives, approved and prohibited investments, and duration and credit quality guidelines. Our policy and the portfolio managers are continually reviewed to ensure that the investments are aligned with our strategy.

The table below presents the major indicators of financial condition and liquidity: 

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(in millions, except per share and debt-to-capital amounts)	December 31, 2016	December 31, 2015	Change
Cash and marketable securities	$1,580	$1,328	$252
Cash, marketable securities and unused lines of credit as a percentage of trailing twelve months revenue	31%	28%	3 pts
Long-term debt, net of current portion	2,645	569	2,076
Shareholders’ equity	2,931	2,411	520
Long-term debt-to-capital ratio(a)	59%	27%	32 pts

(a) Calculated using the present value of remaining aircraft lease payments for aircraft that are in our operating fleet as of the balance sheet date.

The following discussion summarizes the primary drivers of the increase in our cash and marketable securities balance and our expectation of future cash requirements.

ANALYSIS OF OUR CASH FLOWS

Cash Provided by Operating Activities

Net cash provided by operating activities was $1.4 billion in 2016 compared to $1.6 billion in 2015. The decrease of $198 million is due to a decline in operating results primarily driven by an increase in non-fuel operating expenses—including $117 million in merger-related costs associated with the acquisition of Virgin America—partially offset by higher revenues and lower fuel costs.

In 2015, we generated $1.6 billion in operating cash flows compared to $1.0 billion in 2014. The increase of $554 million was primarily attributable to improved operating results, driven largely by lower jet fuel costs.

We typically generate positive cash flows from operations, and expect to use that cash flow to buy aircraft and capital equipment, to make debt payments, and to return capital to shareholders. During 2016, we paused our share repurchase program as we prepared for the acquisition of Virgin America.

Cash Used in Investing Activities

Cash used in investing activities was $2.6 billion during 2016, compared to $930 million in 2015. We used $2.0 billion to acquire Virgin America, representing $2.6 billion consideration paid, offset by $645 million of cash acquired. Our capital expenditures were $678 million, or $153 million lower than in 2015 as a result of fewer aircraft purchase deposits made during 2016 as compared to 2015. During 2016 we took delivery of 19 B737-900ERs, and made advance purchase deposits on B737 and E175 aircraft that will be delivered over the next 24 months. This compares to the delivery of 11 B737-900ERs and one Q400 in the prior year.

As of December 31, 2016, we had firm commitments for 54 B737 aircraft through 2023 with options to acquire up to 41 additional B737 NextGen aircraft and MAX aircraft in 2019 through 2024. We have lease commitments for 10 A321neo aircraft with deliveries in 2017 through 2018 and an order for 30 A320neos with deliveries starting in 2020 through 2022. This order is cancelable with the forfeiture of $15 million of predelivery payments. We have firm commitments to purchase or lease 38 E175 aircraft with deliveries from 2017 through 2019 and options to acquire 30 E175 aircraft with deliveries from 2019 to 2021 and lease an additional 8 with deliveries in 2019. The options for all fleet types give us the flexibility, but not the obligation, to grow the fleet assuming profitability and return on invested capital targets can be met.

The table below reflects total expected capital expenditures and the additional expenditures if options were exercised as of February 28, 2017. Additional options will be exercised only if we believe return on invested capital targets can be met:

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(in millions)	2016 Actuals		2017		2018		2019		2020
Aircraft and aircraft purchase deposits - firm(a)	$	528	$	805	$	685	$	595	$	290
Other flight equipment	53		145		135		95		55
Other property and equipment	97		215		205		90		75
Total property and equipment additions	$	678	$	1,165	$	1,025	$	780	$	420
Option aircraft and aircraft deposits, if exercised	$	—	$	60	$	235	$	705	$	1,415

(a) Excludes orders with cancellation options.

Cash used in investing activities was $930 million during 2015, compared to $541 million in 2014. Our capital expenditures were $831 million in 2015, $137 million higher than in 2014.

Cash Provided by Financing Activities

Cash provided by financing activities was $1.5 billion during 2016, compared to cash used of $688 million in 2015. During the year, we secured debt proceeds of $2 billion for the acquisition of Virgin America, made debt payments of $249 million, repurchased $193 million of our common stock and paid cash dividends of $136 million. In 2015, we made debt payments of $116 million, stock repurchases of $505 million and cash dividend payments of $102 million. In 2014, we made debt payments of $119 million and stock repurchases of $348 million, partially offset by proceeds from debt of $51 million

We plan to meet our future capital and operating commitments through our cash and investments on hand, internally generated cash from operations, along with additional debt financing if necessary.

Bank Lines of Credit

We have two $100 million credit facilities and a $52 million credit facility. We have secured letters of credit against the $52 million facility but have no plans to borrow using either of two remaining facilities. Information about these facilities can be found in Note 6 to consolidated financial statements.

CONTRACTUAL OBLIGATIONS AND COMMITMENTS

Aircraft Purchase Commitments

As of December 31, 2016, we had firm orders to purchase or lease 102 aircraft. We also have an order for 30 Airbus A320neo with deliveries from 2020 through 2022 with an option to cancel up to three years in advance of delivery in groups of five aircraft. We could incur a loss of pre-delivery payments and credits as a cancellation fee. We also have options to acquire 41 B737 aircraft with deliveries from 2019 through 2024 and 30 E175 aircraft with deliveries from 2019 through 2021. In addition to the 15 E175 aircraft currently operated by SkyWest in our regional fleet, we have options in future periods to add regional capacity by having SkyWest operate up to 8 more E175 aircraft.

The following table summarizes our projected fleet count by year, as of February 28, 2017:

	Actual Fleet Count		Expected Fleet Activity(a)
Aircraft	Dec 31, 2015	Dec 31, 2016	2017 Changes		Dec 31, 2017	2018 - 2019 Changes		Dec 31, 2019
B737 Freighters & Combis(b)	6	6	(3	)	3	—		3
B737 Passenger Aircraft(b)	141	149	2		151	15		166
Airbus Passenger Aircraft	—	63	5		68	4		72
Total Mainline Fleet	147	218	4		222	19		241
Q400(c)	52	52	—		52	(15	)	37
E175(c)	5	15	18		33	20		53
CRJ700(c)	8	—	—		—	—		—
Total Regional Fleet	65	67	18		85	5		90
Total	212	285	22		307	24		331

^(a)  The expected fleet counts at December 31, 2017, 2018 and 2019 are subject to change.

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^(b)  2017 changes in passenger aircraft reflect delivery of 14 Boeing 737-900ER aircraft, retirement of 10 B737-400 aircraft and the conversion of two B737-700 aircraft into freighters. The freighter and combi changes reflect retirement of five combis and one freighter and the reintroduction of three B737-700 aircraft as freighters.

^(c)  Aircraft are either owned or leased by Horizon or operated under capacity purchase agreement with a third party.

For future firm orders and option exercises, we may finance the aircraft through internally generated cash, long-term debt, or lease arrangements.

Future Fuel Hedge Positions

All of our future oil positions are call options, which are designed to effectively cap the cost of the crude oil component of our jet fuel purchases. With call options, we are hedged against volatile crude oil price increases; and, during a period of decline in crude oil prices, we only forfeit cash previously paid for hedge premiums. Our crude oil positions are as follows:

	Approximate % of Expected Fuel Requirements	Weighted-Average Crude Oil Price per Barrel	Average Premium Cost per Barrel
First Quarter 2017	50%	$60	$2
Second Quarter 2017	50%	$62	$2
Third Quarter 2017	40%	$63	$2
Fourth Quarter 2017	30%	$65	$3
Full Year 2017	42%	$62	$2
First Quarter 2018	20%	$65	$3
Second Quarter 2018	10%	$67	$2
Full Year 2018	7%	$65	$2

Contractual Obligations

The following table provides a summary of our principal payments under current and long-term debt obligations, operating lease commitments, aircraft purchase commitments and other obligations as of December 31, 2016.

(in millions)	2017		2018		2019		2020		2021		Beyond 2021		Total
Current and long-term debt obligations	$	321	$	351	$	424	$	451	$	424	$	1,007	$	2,978
Operating lease commitments(a)	425		389		368		336		292		1,124		2,934
Aircraft maintenance deposits(b)	59		61		65		68		63		90		406
Aircraft purchase commitments (c)	926		848		694		354		277		361		3,460
Interest obligations(d)	90		78		66		54		40		96		424
Aircraft maintenance and parts management (e)	30		32		35		37		40		—		174
Other obligations(f)	80		84		89		94		98		692		1,137
Total	$	1,931	$	1,843	$	1,741	$	1,394	$	1,234	$	3,370	$	11,513

^(a)  Operating lease commitments generally include aircraft operating leases, airport property and hangar leases, office space, and other equipment leases. Included here are Airbus aircraft operated by Virgin America and E175 aircraft that are operated by SkyWest under a capacity purchase agreement.

^(b)  Aircraft maintenance deposits relate to leased Airbus aircraft.

^(c)  Represents non-cancelable contractual payment commitments for aircraft and engines.

^(d)  For variable-rate debt, future obligations are shown above using interest rates forecast as of December 31, 2016.

^(e)  Includes minimum obligations under a parts management and maintenance agreement with a third-party vendor.

^(f)  Includes minimum obligations associated with the SkyWest third-party CPA. Refer to Note 9 in the consolidated financial statements for further information.

Defined Benefit Pensions

The table above excludes contributions to our various pension plans, for which there are no minimum required contributions given the funded status of the plans. The unfunded liability for our qualified defined-benefit pension plans was $197 million at December 31, 2016, compared to a $161 million unfunded position at December 31, 2015. This results in a 90% funded status on a projected benefit obligation basis compared to 92% funded as of December 31, 2015.

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Credit Card Agreements

We have agreements with a number of credit card companies to process the sale of tickets and other services. Under these agreements, there are material adverse change clauses that, if triggered, could result in the credit card companies holding back a reserve from our credit card receivables. Under one such agreement, we could be required to maintain a reserve if our credit rating is downgraded to or below a rating specified by the agreement or our cash and marketable securities balance fell below $500 million. Under another such agreement, we could be required to maintain a reserve if our cash and marketable securities balance fell below $500 million. We are not currently required to maintain any reserve under these agreements.

Deferred Income Taxes

For federal income tax purposes, the majority of our assets, as measured by value, are fully depreciated over a seven-year life using an accelerated depreciation method or bonus depreciation if available. For financial reporting purposes, the majority of our assets are depreciated over 15 to 25 years to an estimated salvage value using the straight-line basis. This difference has created a significant deferred tax liability. At some point in the future the depreciation basis will reverse, potentially resulting in an increase in income taxes paid.

While it is possible that we could have material cash obligations for this deferred liability at some point in the future, we cannot estimate the timing of long-term cash flows with reasonable accuracy. Taxable income and cash taxes payable in the short term are impacted by many items, including the amount of book income generated, which can be volatile depending on revenue and fuel prices, usage of net operating losses, whether "bonus depreciation" provisions are available, as well as other legislative changes that are beyond our control.

In 2016, we made tax payments, net of refunds, totaling $459 million, and had an effective tax rate of 39.5%. We expect our effective tax rate to be in the range of 37% to 38% for 2017 and the effective rate of cash paid for income taxes to be in the range of 20% to 25% of book income, although these estimates are subject to change. We believe that we will have the liquidity available to make our future tax payments.

CRITICAL ACCOUNTING ESTIMATES

The discussion and analysis of our financial position and results of operations in this MD&A are based upon our consolidated financial statements. The preparation of these financial statements requires us to make estimates and judgments that affect our financial position and results of operations. See Note 1 to the consolidated financial statements for a description of our significant accounting policies.

Critical accounting estimates are defined as those that reflect significant management judgment and uncertainties and that potentially may lead to materially different results under varying assumptions and conditions. Management has identified the following critical accounting estimates and has discussed the development, selection and disclosure of these policies with our audit committee.

FREQUENT FLYER PROGRAMS

Alaska's Mileage Plan™ loyalty program awards miles to members who fly on our airlines and our airline partners. We also sell services, including miles for transportation, to non-airline partners, such as hotels, car rental agencies and a major bank that offers Alaska affinity credit cards. In either case, the outstanding miles may be redeemed for travel on our airlines or any of our airline partners. As long as the Mileage Plan™ is in existence, we have an obligation to provide this future travel.

Virgin America's Elevate® program allows guests to earn points for purchasing travel that are redeemable for travel awards throughout our network and the networks of Virgin America's airline partners. A liability for all points outstanding as of December 14, 2016 was recorded at the estimated fair value as part of our acquisition of Virgin America. The fair value was estimated using the estimated ticket value of points expected to be redeemed as of the date of the acquisition. See "Business Combination Accounting, Goodwill and Intangibles" discussion below for estimates used for purchase accounting.

For miles earned by guests who fly on us or our airline partners, we recognize a liability and a corresponding selling expense representing the incremental cost associated with the obligation to provide travel in the future. For services sold through one of our non-airline partners, the sales proceeds that represent award transportation and certificates for discounted companion travel are deferred and recognized when the transportation is delivered, and the remaining components are recorded as commission in other—net revenue in the period the services are performed. Commission revenue recognized for the years ended December 31,

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2016, 2015 and 2014 was $329 million, $280 million and $261 million, respectively. The deferred revenue is recognized as passenger revenue when the award travel occurs, or the miles expire, and as other—net revenue for awards issued and flown on partner airlines.

At December 31, 2016, we had approximately 186.5 billion miles and points outstanding, resulting in an aggregate liability and deferred revenue balance of $1.1 billion. Both the liability and the deferred revenue are determined based on several assumptions that require significant management judgment to estimate and formulate. There are uncertainties inherent in these estimates. Therefore, different assumptions could affect the amount and/or timing of revenue recognition or expenses. The most significant assumptions in accounting for the Mileage Plan™ are described below.

1. The rate at which we defer sales proceeds related to services sold through non-airline partners:

We use the relative selling price method for the deferral of sales proceeds. For contracts that were modified after the effective date of Accounting Standards Update 2009-13, "Multiple-Deliverable Revenue Arrangements—a consensus of the FASB Emerging Issues Task Force" ("ASU 2009-13"), we determined our best estimate of selling price by considering multiple inputs and methods including, but not limited to, the estimated selling price of comparable travel, discounted cash flows, brand value, published selling prices, number of miles awarded and the number of miles redeemed. We estimated the selling prices and volumes over the terms of the agreements in order to determine the allocation of proceeds to each of the multiple deliverables. This relative allocation is evaluated annually and updated according to changes in the assumptions of the volume of related deliverables. A 1% shift between the allocation of cash proceeds to travel deliverables from marketing deliverables would defer the timing of revenue recognition by approximately $8 million.

2. The number of miles that will not be redeemed for travel (breakage):

The liability for outstanding Mileage Plan™ mileage credits includes all mileage credits that are expected to be redeemed, including mileage credits earned by members whose mileage account balances have not yet reached the minimum mileage credit level to redeem an award. Our estimate of the number of miles that will not be redeemed (breakage) considers historical activity in our members’ accounts and other factors. Based on statistical analysis of historical data, our current breakage rate is 17.4%. A hypothetical 1% change in our estimate of breakage has approximately an $8 million effect on the liability.

3. The number of miles used per award:

We estimate how many miles will be used per award. For example, our members may redeem credit for award travel to various locations or choose between a highly restricted award and an unrestricted award. Our estimates are based on the current requirements in our Mileage Plan™ program and historical award redemption patterns.

4. The number of awards redeemed for travel on our airlines versus other airlines:

The cost for us to carry an award passenger is typically lower than the cost we will pay to our travel partners. We estimate the number of awards that will be redeemed on our airlines versus on our travel partners and accrue the estimated costs based on historical redemption patterns. If the number of awards redeemed on our travel partner is higher or lower than estimated, we may need to adjust our liability and corresponding expense.

5. The costs that will be incurred to provide award travel for miles earned by guests who fly on us or our airline partners:

When a frequent flyer travels on his or her award ticket on one of our airlines, incremental costs such as food, fuel and insurance are incurred to carry that passenger. We estimate what these costs will be (excluding any contribution to overhead and profit) and accrue a liability. If the guest travels on another airline on an award ticket, we often must pay the other airline for carrying the guest. The other airline costs are based on negotiated agreements and are often substantially higher than the costs we would incur to carry that guest. We estimate how much we will pay to other airlines for future travel awards based on historical redemptions and settlements with other carriers and accrue a liability accordingly. The costs actually incurred by us or paid to other airlines may be higher or lower than the costs that were estimated and accrued, and therefore we may need to adjust our liability and recognize a corresponding expense.

We regularly review significant Mileage Plan™ assumptions and change our assumptions if facts and circumstances indicate that a change is necessary. Any such change in assumptions could have a significant effect on our financial position and results of operations.

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PENSION PLANS

Our actuarial estimates of pension liability, the related expense and the associated significant assumptions are discussed in Note 8 to the consolidated financial statements.   

The calculation of pension expense and the corresponding liability requires the use of a number of key assumptions, including the expected long-term rate of return on plan assets and the assumed discount rates to be used in the calculation of the projected benefit obligation and the interest and service cost. Changes in these assumptions can result in different expense and liability amounts, and future actual experience can differ from these assumptions.

Pension liability and future pension expense decrease as the discount rate used for the obligation increases. We discounted future pension obligations using rates between 4.29% and 4.50% at December 31, 2016 and between 4.55% and 4.69% at December 31, 2015. The discount rates were determined using current rates earned on high-quality, long-term bonds with maturities that correspond with the estimated cash distributions from each of the four defined-benefit pension plans. The discount rates we use are based on a yield curve that uses a pool of higher-yielding bonds estimated to be more in line with settlement rates, as we have taken steps to ultimately terminate or settle plans that are frozen and move toward freezing benefits in active plans in the future. If the discount rate decreased by 0.5%, our projected benefit obligation at December 31, 2016 would increase by approximately $132 million and our estimated 2017 pension expense would increase by approximately $8 million.

Pension liability and future pension expense can increase or decrease as assumptions in the actuarial data changes. For example, in 2015 we engaged our third-party actuary to update demographic assumptions used in the valuation of the defined-benefit pension liabilities. These assumptions included updates such as estimated salary increases, employee turnover and retirement rates, among other items. The changes in these assumptions decreased our projected benefit obligation by approximately $50 million at December 31, 2015. The primary cause of the decline was the change in expected participant retirement rates. The study found that eligible employees are retiring later than they had in our previous assumption update, resulting in lower expected cash flows post retirement.

Pension expense normally increases as the expected rate of return on pension plan assets decreases. As of December 31, 2016, we estimate that the pension plan assets will generate long-term rates of return between 5.50% and 6.00%, which compares to 6.0% and 6.50% at December 31, 2015. We regularly review the actual asset allocation and periodically rebalance investments as appropriate. This expected long-term rate of return on plan assets at December 31, 2016 is based on an allocation of U.S. and non-U.S. equities, U.S. fixed-income securities, and real estate. A decrease in the expected long-term rate of return of 0.5% would increase our estimated 2017 pension expense by approximately $9 million.

All of our defined-benefit pension plans are now closed to new entrants. Additionally, benefits in our non-union defined-benefit plans were frozen January 1, 2014.

Future changes in plan asset returns, assumed discount rates and various other factors related to the participants in our pension plans will impact our future pension expense and liabilities. We cannot predict what these factors will be in the future.

LONG-LIVED ASSETS

As of December 31, 2016, we had approximately $5.7 billion of property and equipment and related assets, net of accumulated depreciation. In accounting for these long-lived assets, we make estimates about the expected useful lives of the assets, changes in fleet plans, the expected residual values of the assets and the potential for impairment based on the fair value of the assets and the cash flows they generate. Effective October 1, 2016, we changed our estimate of useful lives for certain B737 aircraft from 20 years to 25 years to better align with their operational performance, maintenance experience and industry practice. Factors indicating potential impairment include, but are not limited to, significant decreases in the market value of the long-lived assets, management decisions regarding the future use of the assets, a significant change in the long-lived assets condition, and operating cash flow losses associated with the use of the long-lived asset.

There is inherent risk in estimating the fair value of our aircraft and related parts and their salvage values at the time of impairment. Actual proceeds upon disposition of the aircraft or related parts could be materially less than expected, resulting in additional loss. Our estimate of salvage value at the time of disposal could also change, requiring us to increase the depreciation expense on the affected aircraft. 

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BUSINESS COMBINATION ACCOUNTING, GOODWILL AND INTANGIBLES

To record the value of assets acquired and liabilities assumed as a result of our acquisition of Virgin America on December 14, 2016, we have performed a purchase price allocation utilizing the best information available to management. The purchase price allocation is provisional and is subject to further adjustments as additional information becomes available concerning the fair value of the assets acquired and liabilities assumed with any adjustments to the purchase price allocation to be made as soon as practicable but no later than December 14, 2017. The fair values of the assets acquired and liabilities assumed were determined using market, income or cost methods. Our consolidated balance sheet reflects goodwill in the amount of $1.9 billion at December 31, 2016, representing the excess of the purchase price over the fair value of Virgin America’s tangible and identifiable intangible assets and liabilities. Identifiable intangible assets recorded totaled approximately $143 million at December 31, 2016 and consisted of customer relationships, airport slots and gates. With the exception of airport slots, all of the identified intangible assets are finite-lived and are being amortized over their estimated economic useful lives. Goodwill and indefinite-lived intangible assets are not amortized, but will be tested for impairment at least annually (in the fourth quarter), or more frequently if events or circumstances indicate that an impairment may exist.

Our impairment analysis may include a qualitative assessment to determine whether it is more likely than not that a reporting unit or intangible asset group is impaired. If we do not perform a qualitative assessment, or if we determine it is more likely than not that the fair value of the reporting unit or intangible asset group exceeds its carrying amount, we will calculate the estimated fair value of the reporting unit or intangible asset group and an impairment charge would be recorded to reduce the carrying value to the estimated fair value.

Qualitative factors that might indicate a need to perform an impairment analysis outside of the regular annual assessment could include, but are not limited to: 1) reduced passenger demand as a result of domestic or global economic conditions; 2) significantly ongoing higher prices for jet fuel; 3) significant ongoing lower fares or passenger yields as a result of increased competition or lower demand; 4) a significant increase in future capital expenditure commitments; and 5) significant disruptions to our operations as a result of both internal and external events such as terrorist activities, actual or threatened war, labor actions by employees, or further industry regulation.

Our business combination accounting, as well as future impairment analyses, require management to make assumptions and apply judgment. Key assumptions include, but are not limited to, estimating future cash flows, selecting discount rates and selecting valuation methodologies. These estimates and assumptions are highly subjective and our ability to realize the future cash flows used in our fair value calculations may be affected by changes in economic condition, our economic performance or business strategies.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

We have interest-rate risk on our variable-rate debt obligations and our available-for-sale marketable investment portfolio, and commodity-price risk in jet fuel required to operate our aircraft fleet. We purchase the majority of our jet fuel at prevailing market prices and seek to manage market risk through execution of our hedging strategy and other means. We have market-sensitive instruments in the form of fixed-rate debt instruments and financial derivative instruments used to hedge our exposure to jet-fuel price increases and interest-rate increases. We do not purchase or hold any derivative financial instruments for trading purposes.

Aircraft Fuel

Currently, our fuel-hedging portfolio consists of crude oil call options. Call options effectively cap our pricing for the crude oil, limiting our exposure to increasing fuel prices for about half of our planned fuel consumption. With call options, we are hedged against volatile crude oil price increases, and, during a period of decline in crude oil prices, we only forfeit cash previously paid for hedge premiums. We believe there is risk in not hedging against the possibility of fuel price increases. We estimate that a 10% change in the forward curve for crude oil prices as of December 31, 2016 would increase or decrease the fair value of our crude oil hedge portfolio to approximately $45 million or $7 million, respectively.

Our portfolio value of fuel hedge contracts was $20 million at December 31, 2016 compared to a portfolio value of $4 million at December 31, 2015. We do not have any collateral held by counterparties to these agreements as of December 31, 2016.

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We continue to believe that our fuel hedge program is an important part of our strategy to reduce our exposure to volatile fuel prices. We expect to continue to enter into these types of contracts prospectively, although significant changes in market conditions could affect our decisions. For more discussion, see Note 4 to our consolidated financial statements.

Interest Rates

We have exposure to market risk associated with changes in interest rates related primarily to our debt obligations and short-term investment portfolio. Our debt obligations include variable-rate instruments, which have exposure to changes in interest rates. In order to mitigate the risk of interest rate fluctuations, we have a number of interest rate swaps that fix the interest rates on certain existing variable-rate debt agreements. Our exposure to interest rate variability is further mitigated through our variable-rate investment portfolio. A hypothetical 10% change in the average interest rates incurred on average variable-rate debt held during 2016 would have correspondingly changed our net earnings and cash flows associated with these items by less than $2 million. Our variable-rate debt is approximately 61% and 24% of our total long-term debt as of December 31, 2016 and December 31, 2015, respectively.

We also have investments in marketable securities, which are exposed to market risk associated with changes in interest rates. If short-term interest rates were to average 1% more than they did in 2016, interest income would increase by approximately $15 million.

ITEM 8.   CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

SELECTED QUARTERLY CONSOLIDATED FINANCIAL INFORMATION (unaudited)

	First Quarter				Second Quarter				Third Quarter				Fourth Quarter
(in millions, except per share)	2016		2015		2016		2015		2016		2015		2016		2015
Operating revenues	$	1,347	$	1,269	$	1,494	$	1,437	$	1,566	$	1,515	$	1,524	$	1,377
Operating income	290		238		418		372		400		433		241		255
Net income	184		149		260		234		256		274		114		191
Basic earnings per share(a)	1.47		1.13		2.11		1.80		2.08		2.15		0.92		1.52
Diluted earnings per share(a)	1.46		1.12		2.10		1.79		2.07		2.14		0.92		1.51

^(a)  For earnings per share, the sum of the quarters may not equal the total for the full year due to rounding.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Alaska Air Group, Inc.:

We have audited the accompanying consolidated balance sheets of Alaska Air Group, Inc. and subsidiaries (the Company) as of December 31, 2016 and 2015, and the related consolidated statements of operations, comprehensive operations, shareholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2016. These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Alaska Air Group, Inc. and subsidiaries as of December 31, 2016 and 2015, and the results of their operations and their cash flows for each of the years in the three‑year period ended December 31, 2016, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Alaska Air Group, Inc.’s internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report dated February 28, 2017 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

KPMG LLP

Seattle, Washington

February 28, 2017

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CONSOLIDATED BALANCE SHEETS

As of December 31 (in millions)	2016		2015
ASSETS
Current Assets
Cash and cash equivalents	$	328	$	73
Marketable securities	1,252		1,255
Total cash and marketable securities	1,580		1,328
Receivables—less allowance for doubtful accounts of $1 and $1	302		212
Inventories and supplies—net	47		51
Prepaid expenses and other current assets	121		72
Total Current Assets	2,050		1,663
Property and Equipment
Aircraft and other flight equipment	6,947		5,690
Other property and equipment	1,103		955
Deposits for future flight equipment	545		771
	8,595		7,416
Less accumulated depreciation and amortization	2,929		2,614
Total Property and Equipment—Net	5,666		4,802
Other Assets
Goodwill	1,934		—
Intangible assets	143		—
Other noncurrent assets	169		65
Total Other Assets	2,246		65
Total Assets	$	9,962	$	6,530

See accompanying notes to consolidated financial statements.

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CONSOLIDATED BALANCE SHEETS (continued)

As of December 31 (in millions except share amounts)	2016		2015
LIABILITIES AND SHAREHOLDERS' EQUITY
Current Liabilities
Accounts payable	$	92	$	63
Accrued wages, vacation and payroll taxes	397		298
Air traffic liability	849		669
Other accrued liabilities	878		661
Current portion of long-term debt	319		114
Total Current Liabilities	2,535		1,805
Long-Term Debt, Net of Current Portion	2,645		569
Other Liabilities and Credits
Deferred income taxes	463		682
Deferred revenue	640		431
Obligation for pension and postretirement medical benefits	331		270
Other liabilities	417		362
Total Other Liabilities and Credits	1,851		1,745
Commitments and Contingencies (Note 9)
Shareholders' Equity
Preferred stock, $0.01 par value, Authorized: 5,000,000 shares, none issued or outstanding	—		—
Common stock, $0.01 par value, Authorized: 200,000,000 shares, Issued: 2016 - 129,189,634 shares; 2015 - 128,442,099 shares, Outstanding: 2016 - 123,328,051 shares; 2015 - 125,175,325 shares	1		1
Capital in excess of par value	110		73
Treasury stock (common), at cost: 2016 - 5,861,583 shares; 2015 - 3,266,774 shares	(443)		(250)
Accumulated other comprehensive loss	(305)		(303)
Retained earnings	3,568		2,890
	2,931		2,411
Total Liabilities and Shareholders' Equity	$	9,962	$	6,530

See accompanying notes to consolidated financial statements.

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CONSOLIDATED STATEMENTS OF OPERATIONS

Year Ended December 31 (in millions, except per-share amounts)	2016			2015			2014
Operating Revenues
Passenger
Mainline	$	4,098		$	3,939		$	3,774
Regional	908			854			805
Total passenger revenue	5,006			4,793			4,579
Freight and mail	108			108			114
Other—net	817			697			675
Total Operating Revenues	5,931			5,598			5,368
Operating Expenses
Wages and benefits	1,382			1,254			1,136
Variable incentive pay	127			120			116
Aircraft fuel, including hedging gains and losses	831			954			1,418
Aircraft maintenance	270			253			229
Aircraft rent	114			105			110
Landing fees and other rentals	320			296			279
Contracted services	247			214			196
Selling expenses	225			211			199
Depreciation and amortization	363			320			294
Food and beverage service	126			113			93
Third-party regional carrier expense	95			72			58
Other	365			356			308
Special items—merger-related costs and other	117			32			(30		)
Total Operating Expenses	4,582			4,300			4,406
Operating Income	1,349			1,298			962
Nonoperating Income (Expense)
Interest income	27			21			21
Interest expense	(55		)	(42		)	(48		)
Interest capitalized	25			34			20
Other—net	(1		)	1			20
	(4		)	14			13
Income before income tax	1,345			1,312			975
Income tax expense	531			464			370
Net Income	$	814		$	848		$	605
Basic Earnings Per Share	$	6.59		$	6.61		$	4.47
Diluted Earnings Per Share	$	6.54		$	6.56		$	4.42
Shares used for computation:
Basic	123.557			128.373			135.445
Diluted	124.389			129.372			136.801
Cash dividend declared per share	$	1.10		$	0.80		$	0.50

See accompanying notes to consolidated financial statements.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS

Year Ended December 31 (in millions)	2016			2015			2014
Net Income	$	814		$	848		$	605
Other Comprehensive Income (Loss):
Related to marketable securities:
Unrealized holding gains (losses) arising during the period	1			(6		)	2
Reclassification of (gains) losses into Other-net nonoperating income (expense)	(1		)	1			(2		)
Income tax benefit (expense)	—			2			—
Total	—			(3		)	—
Related to employee benefit plans:
Actuarial gains (losses) related to pension and other postretirement benefit plans	(43		)	10			(210		)
Reclassification of net pension expense into Wages and benefits	20			14			9
Income tax benefit (expense)	12			(14		)	76
Total	(11		)	10			(125		)
Related to interest rate derivative instruments:
Unrealized holding gains (losses) arising during the period	8			(5		)	(8		)
Reclassification of losses into Aircraft rent	6			6			6
Income tax benefit (expense)	(5		)	(1		)	—
Total	9			—			(2		)
Other Comprehensive Income (Loss)	(2		)	7			(127		)
Comprehensive Income	$	812		$	855		$	478

See accompanying notes to consolidated financial statements.

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

(in millions)	Common Stock Outstanding		Common Stock		Capital in Excess of Par Value			Treasury Stock			Accumulated Other Comprehensive Income (Loss)			Retained Earnings			Total
Balances at December 31, 2013	137.492		$	1	$	606		$	(2	)	$	(183	)	$	1,607		$	2,029
2014 net income	—		—		—			—			—			605			605
Other comprehensive income/(loss)	—		—		—			—			(127		)	—			(127		)
Common stock repurchase	(7.317	)	—		(346		)	(2		)	—			—			(348		)
Stock-based compensation	—		—		16			—			—			—			16
Cash dividend declared	—		—		—			—			—			(68		)	(68		)
Stock issued for employee stock purchase plan	0.299		—		9			—			—			—			9
Stock issued under stock plans	1.007		—		11			—			—			—			11
Balances at December 31, 2014	131.481		1		296			(4		)	(310		)	2,144			2,127
2015 net income	—		—		—			—			—			848			848
Other comprehensive income/(loss)	—		—		—			—			7			—			7
Common stock repurchase	(7.208	)	—		(259		)	(246		)	—			—			(505		)
Stock-based compensation	—		—		17			—			—			—			17
Cash dividend declared	—		—		—			—			—			(102		)	(102		)
Stock issued for employee stock purchase plan	0.281		—		13			—			—			—			13
Stock issued under stock plans	0.621		—		6			—			—			—			6
Balances at December 31, 2015	125.175		1		73			(250		)	(303		)	2,890			2,411
2016 net income	—		—		—			—			—			814			814
Other comprehensive income/(loss)	—		—		—			—			(2		)	—			(2		)
Common stock repurchase	(2.595	)	—		—			(193		)	—			—			(193		)
Stock-based compensation	—		—		19			—			—			—			19
Cash dividend declared	—		—		—			—			—			(136		)	(136		)
Stock issued for employee stock purchase plan	0.309		—		17			—			—			—			17
Stock issued under stock plans	0.439		—		1			—			—			—			1
Balances at December 31, 2016	123.328		$	1	$	110		$	(443	)	$	(305	)	$	3,568		$	2,931

See accompanying notes to consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CASH FLOWS

Year Ended December 31 (in millions)	2016			2015			2014
Cash flows from operating activities:
Net income	$	814		$	848		$	605
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	363			320			294
Stock-based compensation and other	26			25			6
Changes in certain assets and liabilities:
Changes in deferred tax provision	94			56			114
(Increase) decrease in accounts receivable	(46		)	47			(110		)
Increase (decrease) in air traffic liability	9			38			67
Increase (decrease) in deferred revenue	83			57			40
Changes in pension and other postretirement benefits	23			36			(18		)
Other—net	20			157			32
Net cash provided by operating activities	1,386			1,584			1,030
Cash flows from investing activities:
Property and equipment additions:
Aircraft and aircraft purchase deposits	(528		)	(681		)	(498		)
Other flight equipment	(53		)	(79		)	(131		)
Other property and equipment	(97		)	(71		)	(65		)
Total property and equipment additions	(678		)	(831		)	(694		)
Acquisition of Virgin America, net of cash acquired	(1,951		)	—			—
Purchases of marketable securities	(960		)	(1,327		)	(949		)
Sales and maturities of marketable securities	962			1,175			1,092
Proceeds from disposition of assets and changes in restricted deposits	5			53			10
Net cash used in investing activities	(2,622		)	(930		)	(541		)
Cash flows from financing activities:
Proceeds from issuance of long-term debt, net of issuance costs	2,044			—			51
Long-term debt payments	(249		)	(116		)	(119		)
Common stock repurchases	(193		)	(505		)	(348		)
Cash dividend paid	(136		)	(102		)	(68		)
Other financing activities	25			35			22
Net cash provided by (used in) financing activities	1,491			(688		)	(462		)
Net increase (decrease) in cash and cash equivalents	255			(34		)	27
Cash and cash equivalents at beginning of year	73			107			80
Cash and cash equivalents at end of year	$	328		$	73		$	107
Supplemental disclosure:
Cash paid during the year for:
Interest, net of amount capitalized	$	24		$	8		$	28
Income taxes, net of refunds received	459			349			326

See accompanying notes to consolidated financial statements.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1. GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization and Basis of Presentation

The consolidated financial statements include the accounts of Air Group, or the Company, and its primary subsidiaries, Alaska, Horizon and, starting December 14, 2016, Virgin America. The Company conducts substantially all of its operations through these subsidiaries. All significant intercompany balances and transactions have been eliminated. These financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America and their preparation requires the use of management’s estimates. Actual results may differ from these estimates.

Certain reclassifications have been made to prior year financial statements to conform to classifications used in the current year.

Cash and Cash Equivalents

Cash equivalents consist of highly liquid investments with original maturities of three months or less, such as money market funds, commercial paper and certificates of deposit. They are carried at cost, which approximates market value. The Company reduces cash balances when funds are disbursed. Due to the time delay in funds clearing the banks, the Company normally maintains a negative balance in its cash disbursement accounts, which is reported as a current liability. The amount of the negative cash balance was $15 million and $12 million at December 31, 2016 and 2015 and is included in accounts payable, with the change in the balance during the year included in other financing activities in the consolidated statements of cash flows.

The Company's restricted cash balances are primarily used to guarantee various letters of credit, self-insurance programs or other contractual rights. Restricted cash consists of highly liquid securities with original maturities of three months or less. They are carried at cost, which approximates fair value.

Marketable Securities

Investments with original maturities of greater than three months and remaining maturities of less than one year are classified as short-term investments. Investments with maturities beyond one year may be classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. All cash equivalents and short-term investments are classified as available-for-sale and realized gains and losses are recorded using the specific identification method. Changes in market value, excluding other-than-temporary impairments, are reflected in accumulated other comprehensive loss ("AOCL").

Investments are considered to be impaired when a decline in fair value is judged to be other-than-temporary. The Company uses a systematic methodology that considers available quantitative and qualitative evidence in evaluating potential impairment. If the cost of an investment exceeds its fair value, management evaluates, among other factors, general market conditions, credit quality of debt instrument issuers, the duration and extent to which the fair value is less than cost, the Company's intent and ability to hold, or plans to sell, the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded to Other—net in the consolidated statements of operations and a new cost basis in the investment is established.

Receivables

Receivables are due on demand and consist primarily of airline traffic (including credit card) receivables, Mileage Plan™ partner receivables, amounts due from other airlines related to interline agreements, government tax authorities and other miscellaneous amounts due to the Company, and are net of an allowance for doubtful accounts. Management determines the allowance for doubtful accounts based on known troubled accounts and historical experience applied to an aging of accounts.

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Inventories and Supplies—net

Expendable aircraft parts, materials and supplies are stated at average cost and are included in inventories and supplies—net. An obsolescence allowance for expendable parts is accrued based on estimated lives of the corresponding fleet type and salvage values. The allowance for expendable inventories was $36 million and $37 million at December 31, 2016 and 2015, respectively. Inventory and supplies—net also includes fuel inventory of $16 million and $14 million at December 31, 2016 and 2015, respectively. Repairable and rotable aircraft parts inventories are included in flight equipment.

Property, Equipment and Depreciation

Property and equipment are recorded at cost and depreciated using the straight-line method over their estimated useful lives less an estimated salvage value, which are as follows:

Aircraft and related flight equipment:
Boeing 737 and Airbus 319/320 aircraft	20-25 years
Bombardier Q400 aircraft	15 years
Buildings	25 - 30 years
Minor building and land improvements	10 years
Capitalized leases and leasehold improvements	Generally shorter of lease term or estimated useful life
Computer hardware and software	3-10 years
Other furniture and equipment	5-10 years

Salvage values used for aircraft are 10% of the fair value, but as aircraft near the end of their useful lives, management updates the salvage value estimates based on current market conditions and expected use of the aircraft. “Related flight equipment” includes rotable and repairable spare inventories, which are depreciated over the associated fleet life unless otherwise noted.

Beginning October 1, 2016, the Company changed its accounting estimate for the expected useful life of the B737 NextGen aircraft, which includes the B737-700, -800, -900, -900ER aircraft and the related parts, from 20 years to 25 years. The change in estimate was precipitated by management's annual accounting policy review, which considered market studies, asset performance and intended use, as well as industry benchmarking. The change in estimate was applied prospectively effective October 1, 2016. The impact of this change in estimate in 2016 is a $17 million decrease to depreciation and amortization expense.

Capitalized interest, based on the Company’s weighted-average borrowing rate, is added to the cost of the related asset, and is depreciated over the estimated useful life of the asset.

Maintenance and repairs are expensed when incurred. Major modifications that extend the life or improve the usefulness of aircraft are capitalized and depreciated over their estimated period of use.

The Company evaluates long-lived assets to be held and used for impairment whenever events or changes in circumstances indicate that the total carrying amount of an asset or asset group may not be recoverable. The Company groups assets for purposes of such reviews at the lowest level, at which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. An impairment loss is considered when estimated future undiscounted cash flows expected to result from the use of the asset or asset group and its eventual disposition are less than its carrying amount. If the asset or asset group is not considered recoverable, a write-down equal to the excess of the carrying amount over the fair value will be recorded.

Goodwill

Goodwill represents the excess of purchase price over the fair value of the related net assets acquired in the Company's acquisition of Virgin America and is not amortized. As of December 31, 2016 the goodwill balance, based on a provisional purchase price allocation, was $1.9 billion. No goodwill impairment test occurred in 2016, as the acquisition was completed late in the fourth quarter. In future periods, the Company will review goodwill for impairment at least annually, or more frequently if events or circumstances indicate than an impairment may exist. The Company will perform this impairment at the reporting unit level. If fair value of the reporting unit exceeds the carrying amount, an impairment charge may be recorded.

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Intangible Assets

Intangible assets as of December 31, 2016 were recorded as a result of the acquisition of Virgin America, and consist primarily of indefinite-lived airport slots, finite-lived airport gates and finite-lived customer relationships. Finite-lived intangibles are amortized over their estimated useful lives. Indefinite-lived intangibles are not amortized but are tested at least annually for impairment using a similar methodology to property, equipment and goodwill as described above.

Internally Used Software Costs

The Company capitalizes costs to develop internal-use software that are incurred in the application development stage. Amortization commences when the software is ready for its intended use and the amortization period is the estimated useful life of the software, generally three to five years. Capitalized costs primarily include contract labor and payroll costs of the individuals dedicated to the development of internal-use software.

Deferred Revenue

Deferred revenue results primarily from the sale of Mileage Plan™ miles and Elevate® points to third-parties. It also includes the liability for Elevate® flown points outstanding at the acquisition date that was recorded at its estimated fair value as part of purchase price accounting. The related revenue is recognized when award transportation is provided or over the term of the applicable agreement.

Operating Leases

The Company leases aircraft, airport and terminal facilities, office space and other equipment under operating leases. Some of these lease agreements contain rent escalation clauses or rent holidays. For scheduled rent escalation clauses during the lease terms or for rental payments commencing at a date other than the date of initial occupancy, the Company records minimum rental expenses on a straight-line basis over the terms of the leases in the consolidated statements of operations.

Leased Aircraft Return Costs

Cash payments associated with returning leased aircraft are accrued when it is probable that a cash payment will be made and that amount is reasonably estimable, usually no sooner than after the last scheduled maintenance event prior to lease return. Any accrual is based on the time remaining on the lease, planned aircraft usage and the provisions included in the lease agreement, although the actual amount due to any lessor upon return may not be known with certainty until lease termination.

As leased aircraft are returned, any payments are charged against the established accrual. The accrual is part of other current and long-term liabilities and was not material as of December 31, 2016 and December 31, 2015. The expense is included in Aircraft maintenance in the consolidated statements of operations.

Revenue Recognition

Passenger revenue is recognized when the passenger travels. Tickets sold but not yet used are reported as air traffic liability until travel or date of expiration. Air traffic liability includes approximately $62 million and $42 million related to credits for future travel, as of December 31, 2016 and December 31, 2015, respectively. These credits are recognized into revenue either when the passenger travels or at the date of expiration, which is twelve months from issuance. Commissions to travel agents and related fees are expensed when the related revenue is recognized. Passenger traffic commissions and related fees not yet recognized are recorded as a prepaid expense. Taxes collected from passengers, including transportation excise taxes, airport and security fees and other fees, are recorded on a net basis within passenger revenue in the consolidated statements of operations. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized as revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are based on the Company’s historical data.

Freight and mail revenues are recognized when the related services are provided.

Other—net revenues are primarily related to the Mileage Plan™ and Elevate® programs. They are recognized as described in the “Frequent Flyer Programs” paragraph below. Other—net also includes certain ancillary or non-ticket revenues, such as checked-bag fees, reservations fees, ticket change fees, on-board food and beverage sales, and, to a much lesser extent, commissions from car and hotel vendors and sales of travel insurance. These items are recognized as revenue when the related services are provided.  Airport lounge memberships are recognized as revenue over the membership period.

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Frequent Flyer Programs

Alaska operates the Mileage Plan™ frequent flyer program, and Virgin America operates the Elevate® frequent flyer program. Both programs provide travel awards to members based on accumulated mileage or points. For miles or points earned by flying on the Company's airlines and through airline partners, the estimated cost of providing award travel is recognized as a selling expense and accrued as a liability, as miles are earned and accumulated.

Alaska and Virgin America also sell services, including miles or points for transportation, to non-airline partners, such as hotels, car rental agencies and major banks that offer Alaska's and Virgin America's affinity credit cards. The Company defers revenue related to air transportation and certificates for discounted companion travel until the transportation is delivered. The deferred proceeds are recognized as passenger revenue for awards redeemed and flown on the Company's airlines and as Other—net revenue for awards redeemed and flown on other airlines (less the cost paid to the other airlines based on contractual agreements). The elements that represent use of the Alaska and Virgin America brands and access to frequent flyer member lists and advertising are recognized as commission income in the period that those elements are sold and included in Other—net revenue in the consolidated statements of operations.

Frequent flyer program deferred revenue and liabilities included in the consolidated balance sheets (in millions):

	2016		2015
Current Liabilities:
Other accrued liabilities	$	484	$	368
Other Liabilities and Credits:
Deferred revenue	638		427
Other liabilities	21		19
Total	$	1,143	$	814

The amounts recorded in other accrued liabilities relate primarily to deferred revenue expected to be realized within one year, which includes Mileage Plan™ awards that have been issued but not yet flown for $43 million and $37 million at December 31, 2016 and 2015.

Frequent flyer program revenue included in the consolidated statements of operations (in millions):

	2016		2015		2014
Passenger revenues	$	293	$	267	$	246
Other—net revenues	429		329		295
Total frequent flyer program revenues	$	722	$	596	$	541

Other—net revenue includes commission revenues of $329 million, $280 million, and $261 million in 2016, 2015, and 2014.

Selling Expenses

Selling expenses include credit card fees, global distribution systems charges, the estimated cost of frequent flyer travel awards earned through air travel, advertising, promotional costs, commissions and incentives. Advertising production costs are expensed as incurred. Advertising expense was $61 million, $55 million, and $49 million during the years ended December 31, 2016, 2015, and 2014.

Derivative Financial Instruments

The Company's operations are significantly impacted by changes in aircraft fuel prices and interest rates. In an effort to manage exposure to these risks, the Company periodically enters into fuel and interest rate derivative instruments. These derivative instruments are recognized at fair value on the balance sheet and changes in the fair value are recognized in AOCL or in the consolidated statements of operations, depending on the nature of the instrument.

The Company does not hold or issue derivative fuel hedge contracts for trading purposes and does not apply hedge accounting. For cash flow hedges related to interest rate swaps, the effective portion of the derivative represents the change in fair value of the hedge that offsets the change in fair value of the hedged item. To the extent the change in the fair value of the hedge does

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not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the hedge is immediately recognized in interest expense.

Fair Value Measurements

Accounting standards define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The standards also establish a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company has elected not to use the fair value option provided in the accounting standards for non-financial instruments. Accordingly, those assets and liabilities are carried at amortized cost. For financial instruments, the assets and liabilities are carried at fair value, which is determined based on the market approach or income approach, depending upon the level of inputs used.

Assets and liabilities recognized or disclosed at fair value on a nonrecurring basis include items such as property, plant and equipment, goodwill, intangible assets and certain other assets and liabilities. The Company determines the fair value of these items using Level 3 inputs, as described in Note 2 and Note 5.

Income Taxes

The Company uses the asset and liability approach for accounting for and reporting income taxes. Deferred tax assets and liabilities are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and for operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. A valuation allowance would be established, if necessary, for the amount of any tax benefits that, based on available evidence, are not expected to be realized. As of December 31, 2016, there is a partial valuation allowance against net deferred tax assets. The Company accounts for unrecognized tax benefits in accordance with the applicable accounting standards.

Virgin America has substantial federal and state net operating losses ("NOLs") for income tax purposes. The Company's ability to utilize Virgin America's NOLs could be limited if Virgin America had an “ownership change,” as defined in Section 382 of the Internal Revenue Code and similar state provisions. In general terms, an ownership change can occur whenever there is a collective shift in the ownership of a company by more than 50% by one or more “5% stockholders” within a three-year period. The occurrence of such a change generally limits the amount of NOL carryforwards a company could utilize in a given year to the aggregate fair market value of the company's common stock immediately prior to the ownership change, multiplied by the long-term tax-exempt interest rate in effect for the month of the ownership change. The acquisition constituted an ownership change and the potential for further limitations following the acquisition. See Note 7 to the consolidated financial statements for more discussion of the calculation.

Stock-Based Compensation

Accounting standards require companies to recognize as expense the fair value of stock options and other equity-based compensation issued to employees as of the grant date. These standards apply to all stock awards that the Company grants to employees as well as the Company’s Employee Stock Purchase Plan ("ESPP"), which features a look-back provision and allows employees to purchase stock at a 15% discount. All stock-based compensation expense is recorded in wages and benefits in the consolidated statements of operations.

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Earnings Per Share (EPS)

Diluted EPS is calculated by dividing net income by the average common shares outstanding plus additional common shares that would have been outstanding assuming the exercise of in-the-money stock options and restricted stock units, using the treasury-stock method. In 2016, 2015, and 2014, antidilutive stock options excluded from the calculation of EPS were not material.

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers"(Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. This comprehensive new standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. In March 2016, the FASB issued ASU 2016-08, "Revenue from Contracts with Customers (Topic 606), Principal versus Agent Considerations" to clarify the guidance on determining whether the Company is considered the principal or the agent in a revenue transaction where a third party is providing goods or services to a customer. Entities are permitted to use either a full retrospective or cumulative effect transition method, and are required to adopt all parts of the new revenue standard using the same transition method. The new standard is effective for the Company on January 1, 2018. At this time, the Company believes the most significant impact to the financial statements will be to Mileage Plan™ revenues and liabilities. The Company currently uses the incremental cost approach for miles earned through travel. As this approach will be eliminated with the standard, the Company will be required to significantly increase its liability for earned miles through a relative selling price model. The Company continues to evaluate and model the full impact of the standard and currently plans to apply the full retrospective transition method.

In April 2015, the FASB issued ASU 2015-03, "Interest—Imputation of Interest" (Subtopic 835-30), which requires debt issuance costs related to a debt liability be presented as a direct deduction from the carrying value of the debt liability. The amendment was adopted as of January 1, 2016. Prior period debt balances have been adjusted to reflect the adoption of the ASU. The adoption of the ASU had no impact on the statements of operations or retained earnings.

In February 2016, the FASB issued ASU 2016-02, "Leases" (Topic 842), which requires lessees to recognize assets and liabilities for leases currently classified as operating leases. Under the new standard a lessee will recognize a liability on the balance sheet representing the lease payments owed, and a right-of-use-asset representing its right to use the underlying asset for the lease term. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election not to recognize lease assets and lease liabilities. The new standard is effective for the Company on January 1, 2019. Early adoption of the standard is permitted. At this time, the Company believes the most significant impact to the financial statements will relate to the recording of a right of use asset associated with leased aircraft. Other leases, including airports and real estate, equipment, software and other miscellaneous leases continue to be assessed for impact as it relates to ASU 2016-02. The Company has not yet determined whether it will early adopt the standard.

In March 2016, the FASB issued ASU 2016-09, "Compensation—Stock Compensation" (Topic 718), which simplifies several aspects of accounting for employee share-based payment awards, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The ASU is effective for the Company beginning January 1, 2017. The adoption of the standard will not have a material impact on the Company's statements of operations or financial position.

In January 2017, the FASB issued ASU 2017-04, "Intangibles—Goodwill and Other" (Topic 350), which eliminates step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The ASU is effective for the Company beginning January 1, 2019. Early adoption of the standard is permitted. Beginning in fiscal 2017 the Company will be required to perform an impairment test for goodwill arising from its acquisition of Virgin America and plans to adopt the standard in 2017.

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NOTE 2. ACQUISITION OF VIRGIN AMERICA INC.

Virgin America

On December 14, 2016, the Company acquired 100% of the outstanding common shares and voting interest of Virgin America. Virgin America offers scheduled air transport throughout the United States and Mexico primarily from its focus cities of Los Angeles, San Francisco and, to a lesser extent, Dallas Love Field, to other major business and leisure destinations in North America. The Company believes the acquisition of Virgin America will provide broader national reach and position the Company to better serve people living on the West Coast. The combined airline will provide 1,200 daily departures to its guests, leveraging Alaska's strength in the Pacific Northwest with Virgin America's strength in California. The Company believes that combining loyalty programs and networks will provide greater benefits for its guests and expand its international partner portfolio, giving guests an even more expansive global reach.

The results of Virgin America have been included in the consolidated financial statements since the acquisition date. For the year ended December 31, 2016, revenue and net income from Virgin America recognized in the Company's consolidated results of operations were $99 million and $15 million.

Fair value of consideration transferred

The fair value of consideration transferred on the closing date includes the value of the cash consideration and accelerated and vested equity awards attributable to pre-acquisition service. The purchase price is as follows (in millions, except per-share stock price):

	December 14, 2016
Number of shares of Virgin America common stock issued and outstanding	44.645
Multiplied by cash consideration for each share of common stock per the merger agreement	$	57.00
Cash consideration paid for common stock issued and outstanding	2,545
Accelerated and vested equity awards attributable to pre-acquisition service	51
Total Purchase Price	$	2,596

Fair values of the assets acquired and the liabilities assumed

The transaction has been accounted for as a business combination using the acquisition method of accounting, which requires, among other things, that assets acquired and liabilities assumed be recognized on the balance sheet at their fair values as of the acquisition date. The fair values of the assets acquired and liabilities assumed were determined using the market, income and cost approaches. The purchase price allocation was prepared on a preliminary basis and is subject to further adjustments as additional information becomes available concerning the fair value of the assets acquired and liabilities assumed. The Company expects to continue obtaining information to assist it with determining the fair values of the net assets acquired during the measurement period. Any adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the acquisition date.

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Provisional fair value of the assets acquired and the liabilities assumed as of the acquisition date, December 14, 2016, (in millions) are as follows:

	December 14, 2016
Cash and cash equivalents	$	645
Receivables	44
Prepaid expenses and other current assets	16
Property and equipment	560
Intangible assets	143
Goodwill	1,934
Other assets	84
Total assets	3,426
Accounts payable	22
Accrued wages, vacation and payroll taxes	51
Air traffic liabilities	172
Other accrued liabilities	196
Current portion of long-term debt	125
Long-term debt, net of current portion	360
Deferred income taxes	(304		)
Deferred revenue	126
Other liabilities	82
Total liabilities	830
Total purchase price	$	2,596

Intangible Assets

Of the $143 million of acquired intangible assets, $89 million was provisionally assigned to airport slots. Airport slots are rights to take-off or land at a slot-controlled airport during a specific time period and are a means by which the FAA manages airspace/airport congestion. The Company acquired slots at three such airports—John F. Kennedy International, LaGuardia and Ronald Reagan Washington National. These slots either have no expiration dates or are expected to be renewed indefinitely in line with the FAA's past practice. They require no maintenance and do not have an established residual value. As the demands for air travel at these airports have remained very strong, the Company expects to use these slots in perpetuity and has determined these airport slots to be indefinite-lived intangible assets. They will not be amortized but rather tested for impairment annually, or more frequently when events and circumstances indicate that impairment may exist.

Of the remaining $54 million, $40 million was provisionally assigned to customer relationships to be amortized on a straight-line basis over the estimated economic life of eight years and $14 million to airport gates to be amortized on straight-line basis over the remaining lease term of twelve years. As noted above, the fair value of the acquired identifiable intangible assets is provisional pending results of their final valuation.

The Company considered examples of intangible assets that the FASB believes meet the criteria for recognition apart from goodwill, as well as any other intangible assets common to the airline industry, and did not identify any other such intangible assets acquired in the transaction.

Goodwill

Goodwill of $1.9 billion represents the excess of the purchase price over the fair value of the underlying net assets acquired and largely results from expected future synergies from combining operations as well as an assembled workforce, which does not qualify for separate recognition. Goodwill is not amortized to earnings, but instead is reviewed for impairment at least annually, absent any indicators of impairment.

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Repayment of related-party debt and merger-related costs

Soon after the acquisition, the Company repaid $55 million of related-party debt held by Virgin America as of December 14, 2016 to comply with the change-of-control provision triggered by the transaction.

As of December 31, 2016, the Company has incurred pretax merger-related costs of $117 million. Costs classified as merger-related are directly attributable to merger activities. These costs are classified as "Special items—merger-related costs and other" within the Statement of Operations. Refer to Note 11 for further information on special items. The Company expects to continue to incur merger-related costs in the future as the integration continues.

Pro forma impact of the acquisition

The unaudited pro forma financial information presented below represents a summary of the consolidated results of operations for the Company and Virgin America as if the acquisition of Virgin America had been consummated as of January 1, 2015. The pro forma results do not include any anticipated synergies, or other expected benefits of the acquisition. Accordingly, the unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated as of January 1, 2015.

(in millions, except per share amounts)	Years Ended December 31,
	2016		2015
Revenue	$	7,511	$	7,111
Net Income	1,008		914

NOTE 3. CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

Components for cash, cash equivalents and marketable securities (in millions):

December 31, 2016	Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Cash	$	283	$	—	$	—		$	283
Cash equivalents	45		—		—			45
Cash and cash equivalents	328		—		—			328
U.S. government and agency securities	290		—		(3		)	287
Foreign government bonds	36		—		—			36
Asset-backed securities	138		—		—			138
Mortgage-backed securities	89		—		—			89
Corporate notes and bonds	693		2		(4		)	691
Municipal securities	11		—		—			11
Marketable securities	1,257		2		(7		)	1,252
Total	$	1,585	$	2	$	(7	)	$	1,580

December 31, 2015	Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Cash	$	4	$	—	$	—		$	4
Cash equivalents	69		—		—			69
Cash and cash equivalents	73		—		—			73
U.S. government and agency securities	254		—		(1		)	253
Foreign government bonds	31		—		—			31
Asset-backed securities	130		—		—			130
Mortgage-backed securities	117		—		(1		)	116
Corporate notes and bonds	711		1		(4		)	708
Municipal securities	17		—		—			17
Marketable securities	1,260		1		(6		)	1,255
Total	$	1,333	$	1	$	(6	)	$	1,328

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Unrealized losses from marketable securities are primarily attributable to changes in interest rates. Management does not believe any remaining unrealized losses represent other-than-temporary impairments based on the Company's evaluation of available evidence as of December 31, 2016.

Activity for marketable securities (in millions):  

	2016			2015			2014
Proceeds from sales and maturities	$	962		$	1,175		$	1,092
Gross realized gains	3			2			4
Gross realized losses	(1		)	(3		)	(2		)

Maturities for marketable securities (in millions):

December 31, 2016	Cost Basis		Fair Value
Due in one year or less	$	182	$	182
Due after one year through five years	1,070		1,065
Due after five years through 10 years	5		5
Due after 10 years	—		—
Total	$	1,257	$	1,252

NOTE 4. DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT

Fuel Hedge Contracts

The Company’s operations are inherently dependent upon the price and availability of aircraft fuel. To manage economic risks associated with fluctuations in aircraft fuel prices, the Company periodically enters into call options for crude oil.

As of December 31, 2016, the Company had fuel hedge contracts outstanding covering 394 million gallons of crude oil that will be settled from January 2017 to June 2018.

Interest Rate Swap Agreements

The Company is exposed to market risk from adverse changes in variable interest rates on long term debt and certain aircraft lease agreements. To manage this risk, the Company periodically enters into interest rate swap agreements. As of December 31, 2016, the Company has outstanding interest rate swap agreements with a third party designed to hedge the volatility of the underlying variable interest rates on lease agreements for six B737-800 aircraft, as well as two interest rate swap agreements with third parties designed to hedge the volatility of the underlying variable interest rates on $295 million of the debt obtained in 2016. All of the interest rate swap agreements stipulate that the Company pay a fixed interest rate and receive a floating interest rate over the term of the underlying contracts. The interest rate swap agreements expire from February 2020 through March 2021 to coincide with the lease termination dates and October 2022 through September 2026 to coincide with the debt maturity dates. All significant terms of the swap agreements match the terms of the underlying hedged items, and have been designated as qualifying hedging instruments, which are accounted for as cash flow hedges.

As qualifying cash flow hedges, the interest rate swaps are recognized at fair value on the balance sheet, and changes in the fair value are recognized in accumulated other comprehensive income (loss). The effective portion of the derivative represents the change in fair value of the hedge that offsets the change in fair value of the hedged item. To the extent the change in fair value of the hedge does not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the hedge is recognized in interest expense, if material.

Fair Values of Derivative Instruments

Fair values of derivative instruments on the consolidated balance sheet (in millions):

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	2016			2015
Derivative Instruments Not Designated as Hedges
Fuel hedge contracts
Prepaid expenses and other current assets	$	17		$	2
Other assets	3			2
Derivative Instruments Designated as Hedges
Interest rate swaps
Other accrued liabilities	(5		)	(5		)
Other liabilities	—			(13		)
Losses in accumulated other comprehensive loss (AOCL)	(5		)	(18		)

The net cash paid for new fuel hedge positions and settlements was $19 million, $17 million and $9 million during 2016, 2015, and 2014.

Pretax effect of derivative instruments on earnings and AOCL (in millions):

	2016			2015			2014
Derivative Instruments Not Designated as Hedges
Fuel hedge contracts
Gains (losses) recognized in Aircraft fuel	$	(3	)	$	(19	)	$	(18	)
Derivative Instruments Designated as Hedges
Interest rate swaps
Gains (losses) recognized in Aircraft rent	(6		)	(6		)	(6		)
Gains (losses) recognized in other comprehensive income (OCI)	8			(5		)	(8		)

The amounts shown as recognized in aircraft rent for cash flow hedges (interest rate swaps) represent the realized losses transferred out of AOCL to aircraft rent. No gains or losses related to interest rate swaps on variable rate debt have been recognized in interest expense during 2016. The amounts shown as recognized in OCI are prior to the losses recognized in aircraft rent during the period. The Company expects $4 million to be reclassified from OCI to aircraft rent and $1 million to interest expense within the next twelve months.

Credit Risk and Collateral

The Company is exposed to credit losses in the event of non-performance by counterparties to these derivative instruments. To mitigate exposure, the Company periodically reviews the risk of counterparty nonperformance by monitoring the absolute exposure levels and credit ratings. The Company maintains security agreements with a number of its counterparties which may require the Company to post collateral if the fair value of the selected derivative instruments fall below specified thresholds. The posted collateral does not offset the fair value of the derivative instruments and is included in "Prepaid expenses and other current assets" on the consolidated balance sheet.

The amount posted as collateral for these contracts is not material to the consolidated balance sheets as of December 31, 2016 and 2015.

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NOTE 5. FAIR VALUE MEASUREMENTS

Fair Value of Financial Instruments on a Recurring Basis

Fair values of financial instruments on the consolidated balance sheet (in millions):

December 31, 2016	Level 1		Level 2			Total
Assets
Marketable securities
U.S. government and agency securities	$	287	$	—		$	287
Foreign government bonds	—		36			36
Asset-backed securities	—		138			138
Mortgage-backed securities	—		89			89
Corporate notes and bonds	—		691			691
Municipal securities	—		11			11
Derivative instruments
Fuel hedge contracts—call options	—		20			20
Liabilities
Derivative instruments
Interest rate swap agreements	—		(5		)	(5		)

December 31, 2015	Level 1		Level 2			Total
Assets
Marketable securities
U.S. government and agency securities	$	253	$	—		$	253
Foreign government bonds	—		31			31
Asset-backed securities	—		130			130
Mortgage-backed securities	—		116			116
Corporate notes and bonds	—		708			708
Municipal securities	—		17			17
Derivative instruments
Fuel hedge contracts—call options	—		4			4
Liabilities
Derivative instruments
Interest rate swap agreements	—		(18		)	(18		)

The Company uses the market and income approach to determine the fair value of marketable securities. U.S. government securities are Level 1 as the fair value is based on quoted prices in active markets. Foreign government bonds, asset-backed securities, mortgage-backed securities, corporate notes and bonds, and municipal securities are Level 2 as the fair value is based on standard valuation models that are calculated based on observable inputs such as quoted interest rates, yield curves, credit ratings of the security and other observable market information.

The Company uses the market approach and the income approach to determine the fair value of derivative instruments. Fuel hedge contracts that are not traded on a public exchange are Level 2 as the fair value is primarily based on inputs which are readily available in active markets or can be derived from information available in active markets. The fair value for call options is determined utilizing an option pricing model based on inputs that are readily available in active markets, or can be derived from information available in active markets. In addition, the fair value considers the exposure to credit losses in the event of non-performance by counterparties. Interest rate swap agreements are Level 2 as the fair value of these contracts is determined based on the difference between the fixed interest rate in the agreements and the observable LIBOR-based interest forward rates at period end, multiplied by the total notional value.

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The Company has no other financial assets that are measured at fair value on a nonrecurring basis at December 31, 2016.

Fair Value of Other Financial Instruments

The Company used the following methods and assumptions to determine the fair value of financial instruments that are not recognized at fair value as described below.

Cash and Cash Equivalents: Carried at amortized costs which approximate fair value.

Debt: The carrying amounts of the Company's variable-rate debt approximate fair values. For fixed-rate debt, the Company uses the income approach to determine the estimated fair value, by discounting cash flows using borrowing rates for comparable debt over the weighted life of the outstanding debt. The estimated fair value of the fixed-rate debt is Level 3 as certain inputs used are unobservable.

Fixed-rate debt that is not carried at fair value on the consolidated balance sheet and the estimated fair value of long-term fixed-rate debt (in millions):

	2016		2015
Carrying amount	$	1,179	$	520
Fair value	1,199		557

NOTE 6. LONG-TERM DEBT

Long-term debt obligations (in millions):

	2016			2015
Fixed-rate notes payable due through 2028	$	1,179		$	520
Variable-rate notes payable due through 2028	1,803			166
Less debt issuance costs	(18		)	(3		)
Long-term debt	2,964			683
Less current portion	319			114
	$	2,645		$	569
Weighted-average fixed-interest rate	4.4		%	5.7		%
Weighted-average variable-interest rate	2.4		%	1.8		%

During 2016, the Company's total debt increased $2.3 billion, primarily due to the addition of $2.0 billion of secured debt financing from multiple lenders to fund the acquisition of Virgin America. Approximately $1.6 billion of the loans are secured by a total of 56 aircraft, including 37 B737-900ER aircraft and 19 B737-800 aircraft. An additional $400 million is secured by Air Group's interest in certain aircraft purchase agreements. The remainder is due to assumed debt from Virgin America. During 2016, the Company made debt payments of $249 million, including $95 million of debt extinguishment that arose from the Virgin America acquisition, and $12 million related to prepayments of existing loans. The Company's variable-rate notes payable bear interest at a floating rate per annum equal to a margin plus the three or six-month LIBOR in effect at the commencement of each semi-annual or three-month period, as applicable. As of December 31, 2016, none of the Company's borrowings were restricted by financial covenants.

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Long-term debt principal payments for the next five years and thereafter (in millions):

	Total
2017	$	321
2018	351
2019	424
2020	451
2021	424
Thereafter	1,007
Total principal payments	$	2,978

Bank Line of Credit

The Company has two$100 million credit facilities and one$52 million credit facility. All three facilities have variable interest rates based on LIBOR plus a specified margin. One of the $100 million facilities, which expires in September 2017, is secured by aircraft. The other $100 million facility, which expires in March 2017, is secured by certain accounts receivable, spare engines, spare parts and ground service equipment. The $52 million facility expires in October 2017 with a mechanism for annual renewal and is secured by two aircraft. The Company has secured letters of credit against the $52 million facility, but has no plans to borrow using either of the two remaining facilities. All three credit facilities have a requirement to maintain a minimum unrestricted cash and marketable securities balance of $500 million. The Company was in compliance with this covenant at December 31, 2016.

NOTE 7. INCOME TAXES

Deferred Income Taxes

Deferred income taxes reflect the impact of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and such amounts for tax purposes. Primarily due to differences in depreciation rates for federal income tax purposes and for financial reporting purposes, the Company has generated a net deferred tax liability.

Deferred tax (assets) and liabilities comprise the following (in millions):

	2016			2015
Excess of tax over book depreciation	$	1,282		$	1,110
Intangibles	39			—
Other—net	26			23
Gross deferred tax liabilities	1,347			1,133
Mileage Plan™	(310		)	(208		)
Inventory obsolescence	(23		)	(22		)
Deferred gains	(8		)	(8		)
Employee benefits	(196		)	(167		)
Fuel hedge contracts	—			(5		)
Acquired net operating losses	(289		)	—
Other—net	(62		)	(41		)
Gross deferred tax assets	(888		)	(451		)
Valuation allowance	4			—
Net deferred tax (assets) liabilities	$	463		$	682

Changes in net deferred tax liabilities resulted from 2016 activity and the acquisition of Virgin America.

At December 31, 2016, as a result of the acquisition of Virgin America, discussed in Note 2, Virgin America had federal NOLs of approximately $773 million that expire beginning in 2028 and continuing through 2036, and state NOLs of approximately $344 million that expire beginning in 2027 and continuing through 2035.

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Virgin America has experienced multiple “ownership changes” as defined in Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), the most recent being its acquisition by the Company. Section 382 of the Code imposes an annual limitation on the amount of pre-ownership change NOLs of the corporation that experiences an ownership change. The limitation imposed by Section 382 of the Code for any post-ownership change year generally would be determined by multiplying the value of such corporation’s stock immediately before the ownership change by the applicable long-term tax-exempt rate. Any unused annual limitation may, subject to certain limits, be carried over to later years, and the limitation may, under certain circumstances, be increased by built-in gains or reduced by built-in losses in the assets held by such corporation at the time of the ownership change. The combined company’s use of NOLs generated after the date of an ownership change would not be limited unless the combined company were to experience a subsequent ownership change.

The combined company’s ability to use the NOLs will also depend on the amount of taxable income generated in future periods. The NOLs may expire before the combined company can generate sufficient taxable income to utilize the NOLs.

Valuation allowances are provided to reduce the related deferred income tax assets to an amount which will, more likely than not, be realized. The Company has determined it is more likely than not that a portion of the state NOL carryforward will not be realized and, therefore, has provided a valuation allowance of $4 million for that portion. The Company has likewise concluded that it is more likely than not that all of its federal and the remaining state deferred income tax assets will be realized and thus no additional valuation allowance has been recorded. The Company reassesses the need for a valuation allowance each reporting period.

Components of Income Tax Expense

The components of income tax expense were as follows (in millions): 

	2016		2015			2014
Current income tax expense:
Federal	$	392	$	397		$	229
State	48		30			27
Total current income tax expense	440		427			256
Deferred income tax expense:
Federal	77		60			103
State	14		(23		)	11
Total deferred income tax expense	91		37			114
Income tax expense	$	531	$	464		$	370

Income Tax Rate Reconciliation

Income tax expense reconciles to the amount computed by applying the U.S. federal rate of 35% to income before income tax and accounting changes as follows (in millions):

	2016			2015			2014
Income before income tax	$	1,345		$	1,312		$	975
Expected tax expense	471			459			341
Nondeductible expenses	20			4			4
State income taxes	28			19			25
State income sourcing	13			(15		)	—
Other—net	(1		)	(3		)	—
Actual tax expense	$	531		$	464		$	370
Effective tax rate	39.5		%	35.4		%	37.9		%

In 2016, the Company incurred $39 million of acquisition-related costs that are not deductible under U.S. federal tax law. These expenses are included in Special items—merger-related costs and other on the Company’s consolidated statement of operations

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for the year ended December 31, 2016 and are reflected as a permanent unfavorable adjustment for the year ended December 31, 2016, in the table above.

In the fourth quarter of 2015, the Company filed amended state tax returns for the years 2010 through 2013 to change the Company’s position on income sourcing in various states. These positions were also taken on 2014 and future filings, unless guidance or rules changed. In 2016, adjustments were made to the Company's position on income sourcing in various states due to updated guidance from state taxing authorities. The impact of this guidance is reflected as an unfavorable adjustment of approximately $17 million for the year ended December 31, 2016.

Uncertain Tax Positions

The Company has identified its federal tax return and its state tax returns in Alaska, Oregon and California as “major” tax jurisdictions.  A summary of the Company's jurisdictions and the periods that are subject to examination are as follows:

Jurisdiction	Period
Federal	2006 to 2015 (a)(b)
Alaska	2012 to 2015
California	2006 to 2015(a)
Oregon	2003 to 2015(a)

(a) The 2003, 2004, 2008-2010 and 2011 Oregon tax returns are subject to examination only to the extent of net operating loss carryforwards from those years that were utilized in 2010 and later years. The 2006-2012 Federal and California Virgin America tax returns are subject to examination only to the extent of net operating loss carryforwards from those years that were utilized in 2012 and later years.

(b) Income tax years 2012 and 2013 are currently under exam by the Internal Revenue Service.

Changes in the liability for unrecognized tax benefits during 2016, 2015 and 2014 are as follows (in millions):

	2016		2015		2014
Balance at January 1,	$	22	$	3	$	2
Additions based on tax positions and settlements related to the current year	3		19		1
Additions from acquisitions	8		—		—
Balance at December 31,	$	33	$	22	$	3

At December 31, 2016, the total amount of unrecognized tax benefits is recorded as a liability and some have reduced the NOL carryover from the Virgin America acquisition. The Company added $3 million of reserves for uncertain tax positions in 2016, primarily due to changes in income sourcing for state income taxes and added $8 million related to the acquisition of Virgin America. These uncertain tax positions could change as a result of the Company's ongoing audits, settlement of issues, new audits and status of other taxpayer court cases. The Company cannot predict the timing of these actions. Due to the positions being taken in various jurisdictions, the amounts currently accrued are the Company's best estimate as of December 31, 2016.

NOTE 8. EMPLOYEE BENEFIT PLANS

Four defined-benefit and five defined-contribution retirement plans cover various employee groups of Alaska and Horizon. Following the acquisition of Virgin America on December 14, 2016, there is a sixth defined contribution plan which covers the Virgin America employee groups. The defined-benefit plans provide benefits based on an employee’s term of service and average compensation for a specified period of time before retirement. The qualified defined-benefit pension plans are closed to new entrants.

Accounting standards require recognition of the overfunded or underfunded status of an entity’s defined-benefit pension and other postretirement plan as an asset or liability in the consolidated financial statements and requires recognition of the funded status in AOCL.

Qualified Defined-Benefit Pension Plans

The Company’s pension plans are funded as required by the Employee Retirement Income Security Act of 1974. The defined-benefit plan assets consist primarily of marketable equity and fixed-income securities. The Company uses a December 31 measurement date for these plans.

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Weighted average assumptions used to determine benefit obligations:

	2016	2015
Discount rates (a)	4.29% to 4.50%	4.55% to 4.69%
Rate of compensation increases(a)	2.12% to 2.59%	2.06% to 2.65%

^(a)  Varies by plan and related work group.

Weighted average assumptions used to determine net periodic benefit cost:

	2016	2015	2014
Discount rates(a)	4.55% to 4.69%	4.20%	4.85%
Expected return on plan assets(a)	6.00% to 6.50%	6.50%	6.75%
Rate of compensation increases(a)	2.06% to 2.65%	2.85% to 3.91%	2.90% to 3.93%

^(a)  Varies by plan and related work group.

The discount rates are determined using current rates earned on high-quality, long-term bonds with maturities that correspond with the estimated cash distributions from the pension plans. At December 31, 2016, the Company selected discount rates for each of the plans using a pool of higher-yielding bonds estimated to be more reflective of settlement rates, as management has taken steps to ultimately terminate or settle plans that are frozen and move toward freezing benefits in active plans in the future. In determining the expected return on plan assets, the Company assesses the current level of expected returns on risk-free investments (primarily government bonds), the historical level of the risk premium associated with the other asset classes in which the portfolio is invested and the expectations for future returns of each asset class. The expected return for each asset class is then weighted based on the target asset allocation to develop the expected long-term rate of return on assets assumption for the portfolio.

Plan assets are invested in common commingled trust funds invested in equity and fixed income securities and in certain real estate assets. The target and actual asset allocation of the funds in the qualified defined-benefit plans, by asset category, are as follows: 

	Target	2016		2015
Asset category:
Domestic equity securities	22% - 33%	30	%	28	%
Non-U.S. equity securities	9% - 16%	12	%	12	%
Fixed income securities	48% - 67%	53	%	55	%
Real estate	0% - 8%	5	%	5	%
Plan assets		100	%	100	%

The Company’s investment policy focuses on achieving maximum returns at a reasonable risk for pension assets over a full market cycle. In 2015, the Company separated the management of plan assets for the defined-benefit plan that covers the Company's non-union, management participants. This plan has been closed to new participants since 2003 and benefits were frozen effective January 1, 2014. These assets have a higher allocation to fixed income securities than the other plans. The Company uses a fund manager and invests in various asset classes to diversify risk.

The Company determines the strategic allocation between equities, fixed income and real estate based on current funded status and other characteristics of the plans. As the funded status improves, the Company increases the fixed income allocation of the portfolio and decreases the equity allocation. Actual asset allocations are reviewed regularly and periodically rebalanced as appropriate.

As of December 31, 2016, all assets other than real estate were invested in common commingled trust funds.  The Company uses the net asset values of these funds to determine fair value as allowed using the practical expediency method outlined in the accounting standards. Fair value estimates for real estate are calculated using the present value of expected future cash flows based on independent appraisals, local market conditions and current and projected operating performance.

Certain investments were previously misclassified in the fair value hierarchy disclosure in 2015 based on the Company's interpretation of relevant guidance.  Upon further evaluation, investments in common commingled trusts were determined to

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have a readily determinable fair value and are now disclosed within the fair value hierarchy. Additionally, investments in the real estate limited partnership are measured at net asset value per share as a practical expedient and excluded from the fair value hierarchy.  These changes in disclosure do not have a material impact on the financial statements and are consistent with presentation of amounts as of December 31, 2016 as shown below.

Plan asset by fund category (in millions):

	2016		2015		Fair Value Hierarchy
Fund type:
U.S. equity market fund	$	545	$	491	1
Non-U.S. equity fund	218		208		1
Credit bond index fund	992		953		1
Plan assets in common commingled trusts	$	1,755	$	1,652
Real estate	91		85		(a)
Total plan assets	$	1,846	$	1,737

(a) In accordance with Subtopic 820-10, certain investments that are measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.

The following table sets forth the status of the qualified defined-benefit pension plans (in millions):

	2016			2015
Projected benefit obligation ("PBO")
Beginning of year	$	1,898		$	2,050
Service cost	37			41
Interest cost	73			84
Plan settlement	—			(62		)
Actuarial (gain) loss	104			(140		)
Benefits paid	(69		)	(75		)
End of year	$	2,043		$	1,898
Plan assets at fair value
Beginning of year	$	1,737		$	1,917
Actual return on plan assets	178			(43		)
Employer contributions	—			—
Plan settlement	—			(62		)
Benefits paid	(69		)	(75		)
End of year	$	1,846		$	1,737
Funded status (unfunded)	$	(197	)	$	(161	)
Percent funded	90		%	92		%

The accumulated benefit obligation for the combined qualified defined-benefit pension was $1.9 billion and $1.8 billion at December 31, 2016 and 2015.

The amounts recognized in the consolidated balance sheets (in millions): 

	2016			2015
Accrued benefit liability-long term	$	225		$	173
Plan assets-long term (within Other noncurrent assets)	(28		)	(12		)
Total liability recognized	$	197		$	161

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The amounts not yet reflected in net periodic benefit cost and included in AOCL (in millions):

	2016			2015
Prior service credit	$	(10	)	$	(11	)
Net loss	509			499
Amount recognized in AOCL (pretax)	$	499		$	488

The expected amortization of prior service credit and net loss from AOCL in 2017 is $1 million and $26 million, respectively, for the qualified defined-benefit pension plans.

Net pension expense for the qualified defined-benefit plans included the following components (in millions): 

	2016			2015			2014
Service cost	$	37		$	41		$	33
Interest cost	73			84			81
Expected return on assets	(108		)	(122		)	(117		)
Amortization of prior service credit	(1		)	(1		)	(1		)
Recognized actuarial loss	25			26			13
Settlement expense (special item)	—			14			—
Net pension expense	$	26		$	42		$	9

In 2015, the Company recognized a settlement charge of $14 million related to lump sum settlements offered to terminated, vested plan participants. The result was a reduction in the projected benefit obligation of $62 million. The settlement charge reflects the remaining unamortized actuarial loss in AOCL associated with the settled obligation.

There are no current statutory funding requirements for the Company’s plans in 2017, nor does the Company expect to contribute to the qualified defined-benefit pension plans during 2017.

Future benefits expected to be paid over the next ten years under the qualified defined-benefit pension plans from the assets of those plans (in millions): 

	Total
2017	$	85
2018	93
2019	96
2020	109
2021	109
2022– 2026	652

Nonqualified Defined-Benefit Pension Plan

Alaska also maintains an unfunded, noncontributory defined-benefit plan for certain elected officers. This plan uses a December 31 measurement date. The assumptions used to determine benefit obligations and the net period benefit cost for the nonqualified defined-benefit pension plan are similar to those used to calculate the qualified defined-benefit pension plan. The plan's unfunded status, PBO and accumulated benefit obligation are immaterial. The net pension expense in prior year and expected future expense is also immaterial.

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Postretirement Medical Benefits

The Company allows certain retirees to continue their medical, dental and vision benefits by paying all or a portion of the active employee plan premium until eligible for Medicare, currently age 65. This results in a subsidy to retirees, because the premiums received by the Company are less than the actual cost of the retirees’ claims. The accumulated postretirement benefit obligation for this subsidy is unfunded. The accumulated postretirement benefit obligation was $76 million and $64 million at December 31, 2016 and 2015 respectively. The net periodic benefit cost was not material in 2016 or 2015.

During 2014, the Company made changes to the postretirement medical benefits for non-union personnel and certain labor groups to sunset the postretirement medical benefits effective in 2015. As a result of these changes, the Company recognized a partial curtailment gain of $25 million in 2014. The curtailment gain included $5 million associated with an embedded sick leave subsidy. This subsidy was used to establish a new compensated absence liability. The net impact of the curtailment gain of $20 million is included in special items in the income statement.

Defined-Contribution Plans

The defined-contribution plans are deferred compensation plans under section 401(k) of the Internal Revenue Code. All of these plans require Company contributions. Total expense for the defined-contribution plans was $67 million, $60 million and $54 million in 2016, 2015, and 2014.  

The Company also has a noncontributory, unfunded defined-contribution plan for certain elected officers of the Company who are ineligible for the nonqualified defined-benefit pension plan. Amounts recorded as liabilities under the plan are not material to the consolidated balance sheets at December 31, 2016 and 2015.

Pilot Long-term Disability Benefits

Alaska maintains a long-term disability plan for its pilots. The long-term disability plan does not have a service requirement. Therefore, the liability is calculated based on estimated future benefit payments associated with pilots that were assumed to be disabled on a long-term basis as of December 31, 2016 and does not include any assumptions for future disability. The liability includes the discounted expected future benefit payments and medical costs.  The total liability was $25 million and $19 million, which was recorded net of a prefunded trust account of $3 million and $2 million, and included in long-term other liabilities on the consolidated balance sheets as of December 31, 2016 and December 31, 2015, respectively.

Employee Incentive-Pay Plans

The Company has employee incentive plans that pay employees based on certain financial and operational metrics. These metrics are set and approved annually by the Compensation Committee of the Board of Directors. The aggregate expense under these plans in 2016, 2015 and 2014 was $127 million, $120 million and $116 million. The Air Group plans are summarized below.

• Performance-Based Pay ("PBP") is a program that rewards the majority of Air Group employees.  The program is based on four separate metrics related to Air Group profitability, safety, achievement of unit-cost goals and employee engagement as measured by customer satisfaction.

• The Operational Performance Rewards Program entitles the majority of Air Group employees to quarterly payouts of up to $300 per person if certain operational and customer service objectives are met.

Virgin America operated three similar plans, including a traditional profit sharing plan, through 2016. The impact of these plans was immaterial for the period from the date of acquisition through December 31, 2016. Starting January 1, 2017 all employees will participate in the Air Group plans described above.

NOTE 9. COMMITMENTS AND CONTINGENCIES

Future minimum payments for commitments as of December 31, 2016 (in millions):

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	Aircraft Leases		Facility Leases		Aircraft Purchase Commitments		Capacity Purchase Agreements		Aircraft Maintenance Deposits		Aircraft Maintenance and Parts Management
2017	$	302	$	123	$	926	$	76	$	59	$	30
2018	316		73		848		80		61		32
2019	305		63		694		85		65		35
2020	279		57		354		90		68		37
2021	242		50		277		94		63		40
Thereafter	953		171		361		676		90		—
Total	$	2,397	$	537	$	3,460	$	1,101	$	406	$	174

Lease Commitments

Aircraft lease commitments include future obligations for all of the Company's operating airlines—Alaska, Virgin America and Horizon, as well as aircraft leases operated by third-parties. At December 31, 2016, the Company had lease contracts for 17 B737 aircraft, 15 Q400 aircraft and 53 Airbus aircraft. Additionally, as of December 31, 2016 the Company has 15 leased E175s with SkyWest. The Company has 10 scheduled lease deliveries of A321neo aircraft from 2017 through 2018 and five scheduled lease deliveries of E175s in 2017 to be operated by SkyWest. All lease contracts have remaining noncancelable lease terms ranging from 2017 to 2030. The Company has the option to increase capacity flown by SkyWest with eight additional E175 aircraft with deliveries in 2019. Options to lease are not reflected in the commitments table above.

Facility lease commitments primarily include airport and terminal facilities and building leases. Total rent expense for aircraft and facility leases was $315 million, $295 million and $288 million, in 2016, 2015 and 2014.

Aircraft Purchase Commitments

Aircraft purchase commitments include non-cancelable contractual commitments for aircrafts and engines. As of December 31, 2016, the Company is committed to purchasing 54 B737 aircraft (22 B737 NextGen aircraft and 32 B737 MAX aircraft, with deliveries in 2017 through 2023) and 33 E175 aircraft with deliveries in 2017 through 2019. In addition, the Company has options to purchase 41 B737 aircraft, 30 A320neo aircraft and 30 E175 aircraft. Option payments are not reflected in the table above.

Capacity Purchase Agreements ("CPAs")

At December 31, 2016, Alaska had CPAs with three carriers, including the Company's wholly-owned subsidiary, Horizon. Horizon sells 100% of its capacity under a CPA with Alaska. In addition, Alaska has CPAs with SkyWest Airlines, Inc ("SkyWest") to fly certain routes in the Lower 48 and Canada and with Peninsula Airways, Inc ("PenAir") to fly certain routes in the state of Alaska. Under these agreements, Alaska pays the carriers an amount which is based on a determination of their cost of operating those flights and other factors intended to approximate market rates for those services. Future payments (excluding Horizon) are based on minimum levels of flying by the third-party carriers, which could differ materially due to variable payments based on actual levels of flying and certain costs associated with operating flights such as fuel.

Aircraft Maintenance Deposits

The Company is contractually required to make maintenance deposit payments to aircraft lessors, which represent maintenance reserves made solely to collateralize the lessor for future maintenance events should the Company not perform required maintenance. Under most leases, the lease agreements provide that maintenance reserves are reimbursable upon completion of the major maintenance event in an amount equal to the lesser of (i) the amount qualified for reimbursement from maintenance reserves held by the lessor associated with the specific major maintenance event or (ii) the qualifying costs related to the specific major maintenance event.

Aircraft Maintenance and Parts Management

The Company has a separate maintenance-cost-per-hour contract for management and repair of certain rotable parts to support airframe and engine maintenance and repair. This agreement requires monthly payments based upon utilization, such as flight hours, cycles and age of the aircraft, and, in turn, the agreement transfers certain risks to the third-party service provider. There

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are minimum payments under this agreement, which are reflected in the table above. Accordingly, payments could differ materially based on actual aircraft utilization.

Contingencies

The Company is a party to routine litigation matters incidental to its business and with respect to which no material liability is expected. Liabilities for litigation related contingencies are recorded when a loss is determined to be probable and estimable.

In 2015, three flight attendants filed a class action lawsuit seeking to represent all Virgin America flight attendants for damages based on alleged violations of California and City of San Francisco wage and hour laws.  Plaintiffs received class certification in November 2016. Virgin America filed a motion for summary judgment seeking to dismiss all claims on various federal preemption grounds.  In January 2017, the Court denied in part and granted in part Virgin America’s motion.  Virgin America believes the claims in this case are without factual and legal merit and intends to defend this lawsuit through, among other strategies, filing a motion for reconsideration of the Court’s certification decision and denial of summary judgment and, if necessary, a motion for certification of interlocutory appeal to the U.S. Court of Appeals for the Ninth Circuit.

Management believes the ultimate disposition of these matters is not likely to materially affect the Company's financial position or results of operations. This forward-looking statement is based on management's current understanding of the relevant law and facts, and it is subject to various contingencies, including the potential costs and risks associated with litigation and the actions of arbitrators, judges and juries.

NOTE 10. SHAREHOLDERS' EQUITY

Common Stock Changes

During the second quarter of 2014, shareholders voted to increase the number of authorized shares from 100 million to 200 million shares and reduce the par value of common stock from $1 per share to $0.01 per share, and the Board of Directors declared a two-for-one stock split by means of a stock distribution. The additional shares were distributed on July 9, 2014, to the shareholders of record on June 23, 2014.

Dividends

During 2016, the Board of Directors declared dividends of $1.10 per share. The Company paid dividends of $136 million, $102 million and $68 million to shareholders of record during 2016, 2015 and 2014.

Subsequent to year-end, the Board of Directors declared a quarterly cash dividend of $0.30 per share to be paid in March 2017 to shareholders of record as of February 21, 2017. This is a 9% increase from the most recent quarterly dividends of $0.275 per share.

Common Stock Repurchase

In May 2014, the Board of Directors authorized a $650 million share repurchase program, which was completed in October 2015. In August 2015, the Board of Directors authorized a $1.0 billion share repurchase program, which was paused in the second quarter of 2016 in anticipation of the acquisition of Virgin America. At December 31, 2016, the Company held 5,861,583 shares in treasury. Management does not anticipate retiring common shares held in treasury for the foreseeable future.

Share repurchase activity (in millions, except shares):

	2016			2015			2014
	Shares	Amount		Shares	Amount		Shares	Amount
2015 $1 billion Repurchase Program	2,594,809	$	193	1,517,277	$	120	—	$	—
2014 $650 million Repurchase Program	—	—		5,691,051	385		5,497,427	265
2012 $250 million Repurchase Program	—	—		—	—		1,819,304	83
Total	2,594,809	$	193	7,208,328	$	505	7,316,731	$	348

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Accumulated Other Comprehensive Loss (AOCL)

AOCL consisted of the following (in millions, net of tax):  

	2016			2015
Related to marketable securities	$	(3	)	$	(3	)
Related to employee benefit plans	(299		)	(288		)
Related to interest rate derivatives	(3		)	(12		)
	$	(305	)	$	(303	)

NOTE 11. SPECIAL ITEMS

In 2016, the Company recognized special items of $117 million for merger-related costs associated with its acquisition of Virgin America. Costs classified as merger-related are directly attributable to merger activities. $39 million of these costs were not deductible under U.S. federal tax law, as discussed in Note 7. The Company also recognized a special tax expense of $17 million representing the impact of adjustments to the Company's position on income sourcing in various states.

In 2015, the Company recognized special items of $32 million in aggregate. The special items comprise an expense of $14 million for a lump sum settlements offered to terminated and vested participants in the qualified defined benefit pension plans and a litigation-related matter. See Note 8 for more information regarding the pension settlement charge. The Company also recognized a special tax benefit of $26 million representing the discrete impacts of adjustments to the Company's position on income sourcing in various states.

In 2014, the Company recognized special items of $30 million. As discussed in Note 8, a $20 million benefit was recognized related to the curtailment of certain postretirement benefit plans. Furthermore, in 2014 the Company recorded a one-time gain of $10 million associated with the settlement of a legal matter.

NOTE 12. STOCK-BASED COMPENSATION PLANS

The table below summarizes the components of total stock-based compensation (in millions):

	2016		2015		2014
Stock options	$	2	$	2	$	3
Stock awards	11		11		10
Deferred stock awards	1		1		1
Employee stock purchase plan	5		3		2
Stock-based compensation	$	19	$	17	$	16
Tax benefit related to stock-based compensation	$	7	$	7	$	6

Unrecognized stock-based compensation for non-vested options and awards and the weighted-average period the expense will be recognized (in millions):

	Amount		Weighted-Average Period
Stock options	$	2	1.1
Stock awards	21		0.9
Unrecognized stock-based compensation	$	23	0.9

The Company has various equity incentive plans under which it may grant stock awards to directors, officers and employees. The Company also has an employee stock purchase plan.

The Company is authorized to issue 17 million shares of common stock under these plans, of which 11,847,713 shares remain available for future grants of either options or stock awards as of December 31, 2016.

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Stock Options

Stock options to purchase common stock are granted at the fair market value of the stock on the date of grant. The stock options granted have terms of up to ten years.

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used for grants:

	2016			2015			2014
Expected volatility	51		%	53		%	65		%
Expected term	6 years			6 years			6 years
Risk-free interest rate	1.23		%	1.67		%	1.87		%
Expected dividend yield	1.50		%	1.25		%	1.25		%
Weighted-average grant date fair value per share	$	27.14		$	28.71		$	21.70
Estimated fair value of options granted (millions)	$	2		$	3		$	3

The expected market price volatility is based on the historical volatility. The expected term is based on the estimated period of time until exercise based on historical experience. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected dividend yield is based on the estimated weighted average dividend yield over the expected term. The expected forfeiture rates are based on historical experience.

The tables below summarize stock option activity for the year ended December 31, 2016:

	Shares		Weighted- Average Exercise Price Per Share		Weighted- Average Contractual Life (Years)	Aggregate Intrinsic Value (in millions)
Outstanding, December 31, 2015	540,345		$	31.58	6.3	$	26
Granted	79,340		65.63
Exercised	(158,758	)	23.62
Canceled	—		—
Forfeited or expired	(7,253	)	49.66
Outstanding, December 31, 2016	453,674		$	40.02	6.2	$	22
Exercisable, December 31, 2016	199,676		$	25.35	5.1	$	13
Vested or expected to vest, December 31, 2016	453,435		$	40.03	6.2	$	22

(in millions)	2016		2015		2014
Intrinsic value of option exercises	$	9	$	14	$	20
Cash received from stock option exercises	3		4		6
Tax benefit related to stock option exercises	3		5		7
Fair value of options vested	3		3		2

Stock Awards

Restricted Stock Units ("RSUs") are awarded to eligible employees and entitle the grantee to receive shares of common stock at the end of the vest period. The fair value of the RSUs is based on the stock price on the date of grant. The RSUs “cliff vest” after three years, or the period from the date of grant to the employee’s retirement eligibility, and expense is recognized accordingly. Performance Share Units (PSUs) are awarded to certain executives to receive shares of common stock if specific performance goals and market conditions are achieved. There are several tranches of PSUs which vest when performance goals and market conditions are met.

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The following table summarizes information about outstanding stock awards:

	Number of Units		Weighted-Average Grant Date Fair Value		Weighted- Average Contractual Life (Years)	Aggregate Intrinsic Value (in millions)
Non-vested, December 31, 2015	470,715		$	38.09	0.8	$	38
Granted	374,863		63.53
Vested	(366,319	)	32.87
Forfeited	(39,166	)	40.35
Non-vested, December 31, 2016	440,093		$	63.86	1.4	$	39

Deferred Stock Awards

Deferred Stock Units ("DSUs") are awarded to members of its Board of Directors as part of their retainers. The underlying common shares are issued upon retirement from the Board, but require no future service period. As a result, the entire intrinsic value of the awards is expensed on the date of grant.

Employee Stock Purchase Plan

The ESPP allows employees to purchase common stock at 85% of the stock price on the first day of the offering period or the specified purchase date, whichever is lower. Employees may contribute up to 10% of their base earnings during the offering period to purchase stock. Employees purchased 308,920, 281,058 and 298,283 shares in 2016, 2015 and 2014 under the ESPP.

NOTE 13. OPERATING SEGMENT INFORMATION

Alaska Air Group has three operating airlines—Alaska, Virgin America and Horizon. Each is a regulated airline by the U.S. Department of Transportation’s Federal Aviation Administration. Alaska has CPAs for regional capacity with Horizon, as well as with third-party carriers SkyWest and PenAir, under which Alaska receives all passenger revenues.

Under U.S. General Accepted Accounting Principles, operating segments are defined as components of a business for which there is discrete financial information that is regularly assessed by the Chief Operating Decision Maker ("CODM") in making resource allocation decisions. Financial performance for the operating airlines and CPAs is managed and reviewed by the Company's CODM as part of three reportable operating segments:

• Mainline - includes Alaska's and Virgin America’s scheduled air transportation for passengers and cargo throughout the U.S., and in parts of Canada, Mexico, Costa Rica and Cuba.

• Regional - includes Horizon's and other third-party carriers’ scheduled air transportation for passengers across a shorter distance network within the U.S. under CPAs. This segment includes the actual revenues and expenses associated with regional flying, as well as an allocation of corporate overhead incurred by Air Group on behalf of the regional operations.

• Horizon - includes the capacity sold to Alaska under CPA. Expenses include those typically borne by regional airlines such as crew costs, ownership costs and maintenance costs.

The CODM makes resource allocation decisions for these reporting segments based on flight profitability data, aircraft type, route economics and other financial information.

The "Consolidating and Other" column reflects parent company activity, consolidating entries and other immaterial business units of the company. The “Air Group Adjusted” column represents a non-GAAP measure that is used by the Company CODM to evaluate performance and allocate resources. Adjustments are further explained below in reconciling to consolidated GAAP results.

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The operating segment information that follows (in millions) includes financial results for Virgin America for the period from December 14, 2016 to December 31, 2016 and the impact of purchase accounting as of December 14, 2016.

Year Ended December 31, 2016	Mainline(a)			Regional		Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	4,098		$	—	$	—		$	—		$	4,098		$	—		$	4,098
Regional	—			908		—			—			908			—			908
Total passenger revenues	4,098			908		—			—			5,006			—			5,006
CPA revenues	—			—		424			(424		)	—			—			—
Freight and mail	104			5		—			(1		)	108			—			108
Other-net	738			74		4			1			817			—			817
Total operating revenues	4,940			987		428			(424		)	5,931			—			5,931
Operating expenses
Operating expenses, excluding fuel	2,883			769		407			(425		)	3,634			117			3,751
Fuel expense	719			125		—			—			844			(13		)	831
Total operating expenses	3,602			894		407			(425		)	4,478			104			4,582
Nonoperating income (expense)
Interest income	26			—		1			—			27			—			27
Interest expense	(42		)	—		(9		)	(4		)	(55		)	—			(55		)
Other	19			—		1			4			24			—			24
	3			—		(7		)	—			(4		)	—			(4		)
Income (loss) before income tax	$	1,341		$	93	$	14		$	1		$	1,449		$	(104	)	$	1,345

Year Ended December 31, 2015	Mainline			Regional		Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	3,939		$	—	$	—		$	—		$	3,939		$	—		$	3,939
Regional	—			854		—			—			854			—			854
Total passenger revenues	3,939			854		—			—			4,793			—			4,793
CPA revenues	—			—		408			(408		)	—			—			—
Freight and mail	103			5		—			—			108			—			108
Other-net	621			72		4			—			697			—			697
Total operating revenues	4,663			931		412			(408		)	5,598			—			5,598
Operating expenses
Operating expenses, excluding fuel	2,653			695		375			(409		)	3,314			32			3,346
Fuel expense	823			131		—			—			954			—			954
Total operating expenses	3,476			826		375			(409		)	4,268			32			4,300
Nonoperating income (expense)
Interest income	19			—		—			2			21			—			21
Interest expense	(28		)	—		(10		)	(4		)	(42		)	—			(42		)
Other	28			—		1			6			35			—			35
	19			—		(9		)	4			14			—			14
Income (loss) before income tax	$	1,206		$	105	$	28		$	5		$	1,344		$	(32	)	$	1,312

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Year Ended December 31, 2014	Mainline			Regional			Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	3,774		$	—		$	—		$	—		$	3,774		$	—		$	3,774
Regional	—			805			—			—			805			—			805
Total passenger revenues	3,774			805			—			—			4,579			—			4,579
CPA revenues	—			—			371			(371		)	—			—			—
Freight and mail	109			5			—			—			114			—			114
Other-net	592			78			5			—			675			—			675
Total operating revenues	4,475			888			376			(371		)	5,368			—			5,368
Operating expenses
Operating expenses, excluding fuel	2,417			623			349			(371		)	3,018			(30		)	2,988
Fuel expense	1,251			190			—			—			1,441			(23		)	1,418
Total operating expenses	3,668			813			349			(371		)	4,459			(53		)	4,406
Nonoperating income (expense)
Interest income	20			—			—			1			21			—			21
Interest expense	(32		)	—			(12		)	(4		)	(48		)	—			(48		)
Other	39			(1		)	2			—			40			—			40
	27			(1		)	(10		)	(3		)	13			—			13
Income (loss) before income tax	$	834		$	74		$	17		$	(3	)	$	922		$	53		$	975

(a) Includes Alaska activity for the full period and Virgin America financial results for the period December 14, 2016 through December 31, 2016, and the impacts associated with purchase accounting as of December 14, 2016.

(b) Includes consolidating entries, Parent Company and other immaterial business units.

(c) The adjusted column excludes certain charges described in (d) and represents the financial information that is reviewed by management to assess performance of operations and determine capital allocations.

(d) Includes accounting adjustments related to mark-to-market fuel hedge accounting charges (all years), merger-related costs (2016), pension settlement charge (2015), litigation-related matter (2015), non-cash curtailment gain (2014) and a gain related to a legal matter (2014).

	2016			2015			2014
Depreciation and amortization:
Mainline	$	296		$	268		$	243
Horizon	67			52			51
Consolidated	$	363		$	320		$	294
Capital expenditures:
Mainline	$	608		$	821		$	659
Horizon	70			10			35
Consolidated	$	678		$	831		$	694
Total assets at end of period:
Mainline	$	15,260		$	8,127
Horizon	690			717
Consolidating & Other	(5,988		)	(2,314		)
Consolidated	$	9,962		$	6,530

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ITEM 9.     CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A.    CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

The Company’s management, with the participation of the Principal Executive Officer and Principal Financial Officer, conducted an evaluation of the effectiveness of the Company’s disclosure controls and procedures (as defined in Exchange Act Rule 13a-15(e)) as of the end of the period covered by this report. Based on that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that the Company’s disclosure controls and procedures were effective as of the end of the period covered by this report.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

Except as noted below, there have been no changes in the Company’s internal controls over financial reporting during the fourth quarter of 2016 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting except as noted below.

In the fourth quarter of 2016, the Company acquired Virgin America (see Note 2). As permitted by Securities and Exchange Commission Staff interpretive guidance for newly acquired businesses, management excluded Virgin America from its annual evaluation of internal control over financial reporting as of December 31, 2016. We have begun the process of assessing Virgin America’s internal controls over financial reporting and plan to incorporate Virgin America in our evaluation of internal controls over financial reporting in 2017. As of December 31, 2016, Virgin America’s total assets represented approximately 33% of the Company’s consolidated assets, and revenue represented approximately 2% of the Company’s consolidated operating revenues as of and for the year ended December 31, 2016.

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MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the 2013 framework in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO Framework). Management's assessment of internal control over financial reporting as of December 31, 2016 excluded internal control over financial reporting related to Virgin America, acquired December 14, 2016, which represented approximately 33% of consolidated total assets and 2% of consolidated operating revenues as of and for the year ended December 31, 2016. Based on our evaluation, our management concluded that our internal control over financial reporting was effective as of December 31, 2016.

We intend to review and evaluate the design and effectiveness of our disclosure controls and procedures and internal control over financial reporting on an ongoing basis and to improve these controls and procedures over time and to correct any deficiencies that we may discover in the future. While we believe the present design of our disclosure controls and procedures and internal control over financial reporting are effective, future events affecting our business may cause us to modify our controls and procedures.

The Company's independent registered public accounting firm has issued an attestation report regarding its assessment of the effectiveness of the Company's internal control over financial reporting as of December 31, 2016.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Alaska Air Group, Inc.:

We have audited Alaska Air Group, Inc.’s (the Company) internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Alaska Air Group, Inc.’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting (included in Item 9A). Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Alaska Air Group, Inc. maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control - Integrated Framework(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

Alaska Air Group, Inc. acquired Virgin America Inc. (Virgin America) during 2016, and management excluded from its assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2016, Virgin America’s internal control over financial reporting associated with total assets that represented approximately 33% of the Company’s consolidated assets, and revenue that represented approximately 2% of the Company’s consolidated operating revenues included in the consolidated financial statements of the Company and subsidiaries as of and for the year ended December 31, 2016. Our audit of internal control over financial reporting of Alaska Air Group, Inc. also excluded an evaluation of the internal control over financial reporting of Virgin America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Alaska Air Group, Inc. and subsidiaries as of December 31, 2016 and 2015, and the related consolidated statements of operations, comprehensive operations, shareholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2016, and our report dated February 28, 2017 expressed an unqualified opinion on those consolidated financial statements.

KPMG LLP

Seattle, Washington

February 28, 2017

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ITEM 9B.    OTHER INFORMATION

On February 23, 2017, Kathy J. Savitt informed the Company’s board of directors of her intention not to stand for re-election to the boards of the Company and its subsidiaries Alaska Airlines, Inc., Virgin America Inc. and Horizon Air Industries, Inc., at the conclusion of her current term on May 4, 2017.  Ms. Savitt intends to devote significantly more time to Perch Partners, the strategic advisory firm and accelerator she founded in 2016 as well as to social justice causes.  At the same time, Ms. Savitt will relinquish her seat on the Compensation & Leadership Development Committee of the Company’s board of directors.  In connection with Ms. Savitt’s announcement, the boards of directors of the Company and its subsidiaries have reduced the number of seats on their respective boards of directors from 11 to 10, effective May 4, 2017. 

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

See “Executive Officers” under Item 1, “Our Business,” in Part I of this Form 10-K for information on the executive officers of Air Group and its subsidiaries. Except as provided herein, the remainder of the information required by this item is incorporated herein by reference from the definitive Proxy Statement for Air Group's 2017 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year ended December 31, 2016 (hereinafter referred to as our “2017 Proxy Statement”).

ITEM 11. EXECUTIVE COMPENSATION

The information required by this item is incorporated herein by reference from our 2017 Proxy Statement.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT, AND RELATED STOCKHOLDER MATTERS

Securities Authorized for Issuance Under Equity Compensation Plans

	Number of securities to be issued upon exercise of outstanding options, warrants and rights	Weighted-average exercise price of outstanding options, warrants and rights	Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Plan category	(a)	(b)	(c)
Equity compensation plans approved by security holders	1,228,448(1)	$40.02(2)	11,847,713
Equity compensation plans not approved by security holders	—	Not applicable	—
Total	1,228,448	$40.02	11,847,713

(1) Of these shares, 453,674 were subject to options then outstanding under the 2008 Plan, 645,862 were subject to outstanding restricted, performance and deferred stock unit awards granted under the 2008 Plan and 128,912 were subject to outstanding restricted stock unit awards granted under the 2016 Plan. No options were outstanding under the 2016 plan. Outstanding performance awards are reflected in the table assuming that the target level of performance will be achieved.

(2) This number does not reflect the 774,474 shares that were subject to outstanding stock unit awards granted under the 2008 and 2016 Plans.

(3) Of the aggregate number of shares that remained available for future issuance, no shares were available under the 2008 Plan, 5,642,418 shares were available under the 2016 Plan and 6,205,295 shares were available under the ESPP. Subject to certain express limits of the 2016 Plan, shares available for award purposes under the 2016 Plan generally may be used for any type of award authorized under that plan including options, stock appreciation rights, and other forms of awards granted or denominated in shares of our common stock including, without limitation, stock bonuses, restricted stock, restricted stock units and performance shares. Full-value shares issued under the 2016 Plan are counted against the share limit as 1.7 shares for every one share issued. This table does not give effect to that rule.

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Other information required by this item is set forth under the heading “Beneficial Ownership of Securities” in our 2017 Proxy Statement and is incorporated by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this item is incorporated herein by reference from our 2017 Proxy Statement.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this item is incorporated herein by reference from our 2017 Proxy Statement.

PART IV

ITEM 15. EXHIBITS

The following documents are filed as part of this report:

1. Exhibits: See Exhibit Index.

95

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

ALASKA AIR GROUP, INC.
By:	/s/ BRADLEY D. TILDEN	Date:	February 28, 2017
	Bradley D. Tilden
	Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on February 28, 2017 on behalf of the registrant and in the capacities indicated.

96

/s/ BRADLEY D. TILDEN	Chairman and Chief Executive Officer (Principal Executive Officer)
Bradley D. Tilden
/s/ BRANDON S. PEDERSEN	Executive Vice President/Finance and Chief Financial Officer (Principal Financial Officer)
Brandon S. Pedersen
/s/ CHRISTOPHER M. BERRY	Vice President Finance and Controller (Principal Accounting Officer)
Christopher M. Berry
/s/ PATRICIA M. BEDIENT	Director
Patricia M. Bedient
/s/ MARION C. BLAKEY	Director
Marion C. Blakey
/s/ PHYLLIS J. CAMPBELL	Director
Phyllis J. Campbell
/s/ DHIREN R. FONSECA	Director
Dhiren R. Fonseca
/s/ JESSIE J. KNIGHT, JR.	Director
Jessie J. Knight, Jr.
/s/ DENNIS F. MADSEN	Director
Dennis F. Madsen
/s/ HELVI K. SANDVIK	Director
Helvi K. Sandvik
/s/ KATHERINE J. SAVITT	Director
Katherine J. Savitt
/s/ J. KENNETH THOMPSON	Director
J. Kenneth Thompson
/s/ ERIC K. YEAMAN	Director
Eric K. Yeaman

97

EXHIBIT INDEX

Certain of the following exhibits have been filed with the Securities and Exchange Commission and are incorporated by reference from the documents below. Certain others are filed with this Form 10-K. The exhibits are numbered in accordance with Item 601 of Regulation S-K.

Exhibit Number	Exhibit Description	Form	Date of First Filing	Exhibit Number	File Number
3.1	Amended and Restated Certificate of Incorporation of Registrant	10-Q	August 6, 2014	3.1
3.2	Bylaws of Registrant, as amended December 9, 2015	8-K	December 15, 2015	3.2
10.1#	Aircraft General Terms Agreement, dated June 15, 2005, between the Boeing Company and Alaska Airlines, Inc.	10-Q	August 5, 2005	10.1
10.2#	Purchase Agreement No. 2497, dated June 15, 2005, between the Boeing Company and Alaska Airlines, Inc.	10-Q	August 5, 2005	10.2
10.3#	Supplemental Agreement No. 23 to Purchase Agreement No. 2497 between The Boeing Company and Alaska Airlines, Inc.	10-Q/A	August 2, 2011	10.1
10.4#	Supplemental Agreement No. 29 to Purchase Agreement No. 2497 between The Boeing Company and Alaska Airlines, Inc.	10-K	February 14, 2013	10.1
10.5#	Purchase Agreement No. 3866 between The Boeing Company and Alaska Airlines, Inc.	10-K	February 14, 2013	10.2
10.6#	Supplemental Agreement No. 39 to Purchase Agreement No. 2497 between The Boeing Company and Alaska Airlines, Inc.	10-Q	May 7, 2015	10.1
10.7#	Purchase Agreement, dated April 11, 2016, between Embraer S.A. and Horizon Air Industries, Inc.	10-Q	May 9, 2016	10.1
10.8^	A320 Aircraft Purchase Agreement, dated as of December 29, 2010, between Airbus S.A.S. and Virgin America Inc.	S-1/A^	October 7, 2014	10.15
10.9*	Alaska Air Group, Inc. 2008 Performance Incentive Plan, Form of Nonqualified Stock Option Agreement	10-Q	August 4, 2011	10.3
10.10*	Alaska Air Group, Inc. 2008 Performance Incentive Plan, Form of Performance Stock Unit Award Agreement	10-Q	August 4, 2011	10.4
10.11*	Alaska Air Group, Inc. 2008 Performance Incentive Plan, Form of Stock Unit Award Agreement	10-Q	August 4, 2011	10.5
10.12*	Alaska Air Group, Inc. 2008 Performance Incentive Plan, Amended for Stock-Split	10-K	February 11, 2016	10.10
10.13*	Alaska Air Group, Inc. 2016 Performance Incentive Plan	8-K	May 18, 2016	10.1
10.14*	Alaska Air Group, Inc. 2016 Performance Incentive Plan, Form of Nonqualified Stock Option Agreement	10-Q	August 2, 2016	10.1
10.15*	Alaska Air Group, Inc. 2016 Performance Incentive Plan, Form of Incentive Stock Option Agreement	10-Q	August 2, 2016	10.2
10.16*	Alaska Air Group, Inc. 2016 Performance Incentive Plan, Form of Performance Stock Unit Award Agreement	10-Q	August 2, 2016	10.3
10.17*	Alaska Air Group, Inc. 2016 Performance Incentive Plan, Form of Stock Unit Award Agreement	10-Q	August 2, 2016	10.4
10.18*†	Alaska Air Group, Inc. 2010 Employee Stock Purchase Plan, as Amended for the Offering Period Commencing March 1, 2017	10-K	February 28, 2017
10.19*	Alaska Air Group, Inc. Stock Deferral Plan for Non-Employee Directors	10-K	February 11, 2016	10.12
10.20*	Alaska Air Group, Inc. Nonqualified Deferred Compensation Plan, as amended	10-Q	August 4, 2011	10.1
10.21*	1995 Elected Officers Supplementary Retirement Plan, as amended	10-Q	August 4, 2011	10.2
10.22*	Form of Alaska Air Group, Inc. Change of Control Agreement for named executive officers, as amended and restated October 16, 2014	10-K	February 11, 2016	10.15
10.23*†	Alaska Air Group Performance Based Pay Plan, as amended and restated June 19, 2015	10-K	February 28, 2017
21†	Subsidiaries of Registrant
23.1†	Consent of Independent Registered Public Accounting Firm (KPMG LLP)
31.1†	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2†	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1†	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

98

32.2†	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS†	XBRL Instance Document
101.SCH†	XBRL Taxonomy Extension Schema Document
101.CAL†	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF†	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB†	XBRL Taxonomy Extension Label Linkbase Document
101.PRE†	XBRL Taxonomy Extension Presentation Linkbase Document
†	Filed herewith
*	Indicates management contract or compensatory plan or arrangement.
#	Pursuant to 17 CFR 240.24b-2, confidential information has been omitted and filed separately with the Securities and Exchange Commission pursuant to a Confidential Treatment Application filed with the Commission.
^	Filed by Virgin America Inc., File Number 333-197660

99

EX-10.18

ALASKA AIR GROUP, INC. 2010 EMPLOYEE STOCK PURCHASE PLAN

As amended by the Board of Directors for the Offering Period commencing March 1, 2017

1. PURPOSE

The purpose of this Plan is to assist Eligible Employees in acquiring a stock ownership interest in the Company, at a favorable price and upon favorable terms, pursuant to a plan which is intended to qualify as an “employee stock purchase plan” under Section 423 of the Code. This Plan is also intended to encourage Eligible Employees to remain in the employ of the Company or a Participating Subsidiary and to provide them with an additional incentive to advance the best interests of the Company.

2. DEFINITIONS

Capitalized terms used herein which are not otherwise defined shall have the following meanings.

(a) “Account” means the bookkeeping account maintained by the Company, or by a record keeper on behalf of the Company, for a Participant pursuant to Section 7(a).

(b) “Board” means the Board of Directors of the Company.

(c) “Code” means the U.S. Internal Revenue Code of 1986, as amended from time to time.

(d) “Commission” means the U.S. Securities and Exchange Commission.

(e) “Committee” means the committee appointed by the Board to administer the Plan pursuant to Section 12.

(f) “Common Stock” means the common stock, par value $1.00 per share, of the Company, and such other securities or property as may become the subject of Options pursuant to an adjustment made under Section 17.

(g) “Compensation” means an Eligible Employee’s base pay, inclusive of overtime and any employer paid leave. Compensation also includes any amounts contributed as salary reduction contributions to a plan qualifying under Section 401(k), 125, or 129 of the Code. Any other form of remuneration is excluded from Compensation, including (but not limited to) the following: cash bonuses, severance pay, hiring bonuses, prizes, awards, relocation or housing allowances, stock option exercises, stock appreciation right payments, the vesting or grant of restricted stock, the payment of stock units, performance awards, auto allowances, tuition reimbursement, perquisites, non-cash compensation and other forms of imputed income. Notwithstanding the foregoing, Compensation shall not include any amounts deferred under or paid from any nonqualified deferred compensation plan maintained by the Company or any Subsidiary (including, without limitation, the Company’s Nonqualified Deferred Compensation Plan).

(h) “Contributions” means the bookkeeping amounts credited to the Account of the Participant pursuant to this Plan, equal in amount to the amount of Compensation that the Participant has elected to contribute for the purchase of Common Stock under and in accordance with this Plan.

(i) “Company” means Alaska Air Group, Inc., a Delaware corporation, and its successors.

(j) “Effective Date” means March 11, 2010, the date on which this Plan was initially adopted by the Board.

(k) “Eligible Employee” means, subject to Section 3, any employee of the Company, or of any Subsidiary which has been designated in writing by the Committee as a “Participating Subsidiary”; provided, however, that “Eligible Employee” shall not include any employeewhose customary employment is for less than five (5) months in a calendar year.

(l) “Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended from time to time.

(m) “Exercise Date” means, with respect to an Offering Period, the last day of that Offering Period.

(n) “Fair Market Value” on any date means:

(1) if the Common Stock is listed or admitted to trade on a national securities exchange, the closing price of a share of Common Stock on such date on the principal national securities exchange on which the Common Stock is so listed or admitted to trade, or, if there is no trading of the Common Stock on such date, then the closing price of a share of Common Stock on such exchange on the next preceding date on which there was trading in the shares of Common Stock;

(2) in the absence of exchange data required to determine Fair Market Value pursuant to the foregoing, the value as established by the Committee as of the relevant time for purposes of this Plan.

(o) “Grant Date” means, with respect to an Offering Period, the first day of that Offering Period.

(p) “Individual Limit” has the meaning given to such term in Section 4(b).

(q) “Offering Period” means the six (6) month period commencing on each Grant Date; provided, however, that the Committee may declare, as it deems appropriate and in advance of the applicable Offering Period, a shorter (not to be less than three months) Offering Period or a longer (not to exceed 27 months) Offering Period. Unless otherwise expressly provided by the Committee in advance of a particular Offering Period, the Grant Date for that Offering Period may not occur on or before the Exercise Date for the immediately preceding Offering Period.

(r) “Option” means the stock option to acquire shares of Common Stock granted to a Participant pursuant to Section 8.

(s) “Option Price” means the per share exercise price of an Option as determined in accordance with Section 8(b).

(t) “Parent” means any corporation (other than the Company) in an unbroken chain of corporations ending with the Company in which each corporation (other than the Company) owns stock possessing 50% or more of the total combined voting power of all classes of stock in one or more of the other corporations in the chain.

(u) “Participant” means an Eligible Employee who has elected to participate in this Plan and who has filed a valid and effective Subscription Agreement to make Contributions pursuant to Section 6.

(v) “Participating Subsidiary” shall have the meaning given to such term in Section 19(c).

(w) “Plan” means this Alaska Air Group, Inc. 2010 Employee Stock Purchase Plan, as it may be amended or restated from time to time.

(x) “Subscription Agreement” means the written agreement or applicable electronic form of agreement filed by an Eligible Employee with the Company pursuant to Section 6 to participate in this Plan.

(y) “Subsidiary” means any corporation (other than the Company) in an unbroken chain of corporations (beginning with the Company) in which each corporation (other than the last corporation) owns stock possessing 50% or more of the total combined voting power of all classes of stock in one or more of the other corporations in the chain.

3. ELIGIBILITY

Any person employed as an Eligible Employee as of a Grant Date shall be eligible to participate in this Plan during the Offering Period in which such Grant Date occurs, subject to the Eligible Employee satisfying the requirements of Section 6; provided, however, that the Committee may impose a requirement, prior to the start of an Offering Period, that an individual be employed with the Company or a Participating Subsidiary for a specified period of time (which shall be less than two years) prior to the applicable Grant Date to be eligible to participate in that Offering Period.

4. STOCK SUBJECT TO THIS PLAN; SHARE LIMITATIONS

(a) Aggregate Share Limit. Subject to the provisions of Section 17, the capital stock that may be delivered under this Plan will be shares of the Company’s authorized but unissued Common Stock. The maximum number of shares of Common Stock that may be delivered pursuant to Options granted under this Plan is 8,000,000 shares, subject to adjustments pursuant to Section 17.

(b) Individual Share Limit. The maximum number of shares of Common Stock that any one individual may acquire upon exercise of his or her Option with respect to any one Offering Period is 8,000, subject to adjustments pursuant to Section 17 (the “Individual Limit”). The Committee may amend the Individual Limit, effective no earlier than the first Offering Period commencing after the adoption of such amendment, without stockholder approval.

(c) Shares Not Actually Delivered. Shares that are subject to or underlie Options, which for any reason are cancelled or terminated, are forfeited, fail to vest, or for any other reason are not paid or delivered under this Plan shall again, except to the extent prohibited by law, be available for subsequent Options under this Plan.

5. OFFERING PERIODS

During the term of this Plan, the Company will grant Options to purchase shares of Common Stock in each Offering Period to all Participants in that Offering Period. Unless otherwise specified by the Committee in advance of the Offering Period, Offering Periods will be of approximately six (6) months duration and will commence on September 1 and March 1 each year and will end on the following February 28 (or 29, in the case of a leap year) and August 31, respectively. Each Option shall become effective on the Grant Date of the Offering Period with respect to which the Option is granted. The term of each Option shall be the duration of the related Offering Period and shall end on the Exercise Date of that Offering Period. The first Offering Period shall commence as of a date determined by the Board or Committee, but no earlier than the Effective Date. Offering Periods shall continue until this Plan is terminated in accordance with Section 18 or 19, or, if earlier, until no shares of Common Stock remain available for Options pursuant to Section 4.

6. PARTICIPATION

(a) Enrollment. An Eligible Employee may become a participant in this Plan by completing a Subscription Agreement on a form approved by and in a manner prescribed by the Committee (or its delegate). To become effective, a Subscription Agreement must be signed by the Eligible Employee and be filed with the Company at the time specified by the Committee, but in all cases prior to the start of the Offering Period with respect to which it is to become effective, and must set forth a whole percentage (or, if the Committee so provides, a stated amount) of the Eligible Employee’s Compensation to be credited to the Participant’s Account as Contributions each pay period.

(b) Contribution Limits. Notwithstanding the foregoing, a Participant may not elect to contribute less than one percent (1%) nor more than ten percent (10%) (or such other limit as the Committee may establish prior to the start of the applicable Offering Period) of his or her Compensation during any one pay period as Plan Contributions. The Committee also may prescribe other limits, rules or procedures for Contributions.

(c) Content and Duration of Subscription Agreements. Subscription Agreements shall contain the Eligible Employee’s authorization and consent to the Company’s withholding from his or her Compensation the amount of his or her Contributions. An Eligible Employee’s Subscription Agreement, and his or her participation election and withholding consent thereon, shall remain valid for all Offering Periods until (1) the Eligible Employee’s participation terminates pursuant to the terms hereof, (2) the Eligible Employee files a new Subscription Agreement that becomes effective, or (3) the Committee requires that a new Subscription Agreement be executed and filed with the Company.

7. METHOD OF PAYMENT OF CONTRIBUTIONS

(a) Participation Accounts. The Company shall maintain on its books, or cause to be maintained by a record keeper, an Account in the name of each Participant. The percentage of Compensation elected to be applied as Contributions by a Participant shall be deducted from such Participant’s Compensation on each payday during the period for payroll deductions set forth below and such payroll deductions shall be credited to that Participant’s Account as soon as administratively practicable after such date. A Participant may not make any additional payments to his or her Account. A Participant’s Account

shall be reduced by any amounts used to pay the Option Price of shares acquired, or by any other amounts distributed pursuant to the terms hereof.

(b) Payroll Deductions. Subject to such other rules as the Committee may adopt, payroll deductions with respect to an Offering Period shall commence as of the first day of the payroll period which coincides with or immediately follows the applicable Grant Date and shall end on the last date of the payroll period which coincides with or immediately proceeds the applicable Exercise Date, unless sooner terminated by the Participant as provided in Section 7(d) or until his or her participation terminates pursuant to Section 11.

(c) Changes in Contribution Elections for Next Offering Period; One-Time Reduction Permitted During an Offering Period. A Participant may discontinue, increase, or decrease the level of his or her Contributions (within the Plan limits) by completing and filing with the Company, on such terms as the Committee (or its delegate) may prescribe, a new Subscription Agreement which indicates such election. Subject to any other timing requirements that the Committee may impose, an election pursuant to this Section 7(c) shall be effective with the first Offering Period that commences after the Company’s receipt of such election, provided that a Participant may, on one occasion only during an Offering Period, elect to decrease (but not increase) the level of his or her Contributions (subject to Section 6(b)) by filing a new Subscription Agreement with the Company indicating such election, which election shall be effective as soon as administratively practicable following its receipt by the Company. Except as contemplated by the foregoing proviso and Section 7(d) and 7(e), changes in Contribution levels may not take effect during an Offering Period. Other modifications or suspensions of Subscription Agreements are not permitted.

(d) Withdrawal During an Offering Period. A Participant may terminate his or her Contributions during an Offering Period (and receive a distribution of the balance of his or her Account in accordance with Section 11) by completing and filing with the Company, in such form and on such terms as the Committee (or its delegate) may prescribe, a written withdrawal form or applicable electronic withdrawal form which shall be signed by the Participant. Such termination shall be effective as soon as administratively practicable after its receipt by the Company. A withdrawal election pursuant to this Section 7(d) with respect to an Offering Period shall only be effective, however, if it is received by the Company prior to the Exercise Date of the Offering Period (or such earlier deadline that the Committee may reasonably require to process the withdrawal prior to the applicable Exercise Date). Partial withdrawals of Accounts are not permitted.

(e) Discontinuance of Contributions During an Offering Period. A Participant may discontinue his or her Contributions at any time during an Offering Period by completing and filing with the Company, on such terms as the Committee (or its delegate) may prescribe, a new Subscription Agreement which indicates such election. If a Participant elects to discontinue his or her Contributions pursuant to this Section 7(e), the Contributions previously credited to the Participant’s Account for that Offering Period shall be used to exercise the Participant’s Option as of the applicable Exercise Date in accordance with Section 9 (unless the Participant makes a timely withdrawal election in accordance with Section 7(d), in which case such Participant’s Account shall be paid to him or her in cash in accordance with Section 11(a)).

(f) Leaves of Absence. During leaves of absence approved by the Company or a Participating Subsidiary and meeting the requirements of Regulation 1.421-1(h)(2) under the Code, a Participant may elect to continue participation in this Plan by delivering cash payments to the Company on his or her normal paydays equal to the reduction in his or her Plan Contributions caused by his or her leave.

8. GRANT OF OPTION

(a) Grant Date; Number of Shares. On each Grant Date, each Eligible Employee who is a Participant during that Offering Period shall be granted an Option to purchase a number of shares of Common Stock. The Option shall be exercised on the Exercise Date. The

number of shares of Common Stock subject to the Option shall be determined by dividing the Participant’s Account balance as of the applicable Exercise Date by the Option Price, subject to the limits of Section 8(c).

(b) Option Price. The Option Price per share of the shares subject to an Option for an Offering Period shall be the lesser of: (i) 85% of the Fair Market Value of a Share on the Grant Date of that Offering Period; or (ii) 85% of the Fair Market Value of a Share on the Exercise Date of that Offering Period; provided, however, that the Committee may provide prior to the start of any Offering Period that the Option Price for that Offering Period shall be determined by applying a discount amount (not to exceed 15%) to either (1) the Fair Market Value of a share of Common Stock on that Grant Date of that Offering Period, or (2) the Fair Market Value of a share of Common Stock on the Exercise Date of that Offering Period, or (3) the lesser of the Fair Market Value of a share of Common Stock on the Grant Date of that Offering Period or the Fair Market Value of a share of Common Stock on the Exercise Date of that Offering Period. Notwithstanding anything to the contrary in the preceding provisions of this Section 8(b), in no event shall the Option Price per share be less than the par value of a share of Common Stock.

(c) Limits on Share Purchases. Notwithstanding anything else contained herein, the maximum number of shares subject to an Option for an Offering Period shall be subject to the Individual Limit in effect on the Grant Date of that Offering Period (subject to adjustment pursuant to Section 17) and any person who is otherwise an Eligible Employee shall not be granted any Option (or any Option granted shall be subject to compliance with the following limitations) or other right to purchase shares under this Plan to the extent:

(1) it would, if exercised, cause the person to own stock (within the meaning of Section 423(b)(3) of the Code) possessing 5% or more of the total combined voting power or value of all classes of stock of the Company, or of any Parent, or of any Subsidiary; or

(2) such Option causes such individual to have rights to purchase stock under this Plan and any other plan of the Company, any Parent, or any Subsidiary which is qualified under Section 423 of the Code which accrue at a rate which exceeds $25,000 of the fair market value of the stock of the Company, of any Parent, or of any Subsidiary (determined at the time the right to purchase such stock is granted, before giving effect to any discounted purchase price under any such plan) for each calendar year in which such right is outstanding at any time.

For purposes of the foregoing, a right to purchase stock accrues when it first becomes exercisable during the calendar year. In determining whether the stock ownership of an Eligible Employee equals or exceeds the 5% limit set forth above, the rules of Section 424(d) of the Code (relating to attribution of stock ownership) shall apply, and stock which the Eligible Employee may purchase under outstanding options shall be treated as stock owned by the Eligible Employee.

9. EXERCISE OF OPTION

(a) Purchase of Shares. Unless a Participant withdraws pursuant to Section 7(d) or the Participant’s Plan participation is terminated as provided in Section 11, his or her Option for the purchase of shares shall be exercised automatically on the Exercise Date for that Offering Period, without any further action on the Participant’s part, and the maximum number of whole shares of Common Stock subject to such Option (subject to the limits of Section 8(c)) shall be purchased at the Option Price with the balance of such Participant’s Account.

(b) Account Balance Remaining After Purchase. If any amount which is not sufficient to purchase a whole share remains in a Participant’s Account after the exercise of his or her Option on the Exercise Date: (1) such amount shall be credited to such Participant’s Account for the next Offering Period, if he or she is then a Participant; or (2) if such Participant is not a Participant in the next Offering Period, or if the Committee so elects, such amount shall be refunded to such Participant as soon as administratively practicable

after such date. If the share limit of Section 4(a) is reached, any amount that remains in a Participant’s Account after the exercise of his or her Option on the Exercise Date to purchase the number of shares that he or she is allocated shall be refunded to the Participant as soon as administratively practicable after such date. If any amount which exceeds the limits of Section 8(c) remains in a Participant’s Account after the exercise of his or her Option on the Exercise Date, such amount shall be refunded to the Participant as soon as administratively practicable after such date.

10. DELIVERY OF SHARES

As soon as administratively practicable after the Exercise Date, the Company shall, in its discretion, either deliver to each Participant a certificate representing the shares of Common Stock purchased upon exercise of his or her Option, provide for the crediting of such shares in book entry form in the name of the Participant, or provide for an alternative arrangement for the delivery of such shares to a broker or record keeping service for the benefit of the Participant. In the event the Company is required to obtain from any commission or agency authority to issue any such certificate or otherwise deliver such shares, the Company will seek to obtain such authority. If the Company is unable to obtain from any such commission or agency authority which counsel for the Company deems necessary for the lawful issuance of any such certificate or other delivery of such shares, or if for any reason the Company cannot issue or deliver shares of Common Stock and satisfy Section 21, the Company shall be relieved from liability to any Participant except that the Company shall return to each Participant to whom such shares cannot be issued or delivered the amount of the balanced credited to his or her Account that would have otherwise been used for the purchase of such shares. Without limiting the generality of Section 12(b)(3), if shares are delivered to a broker for the benefit of a Participant as described above, the Committee may adopt such policies and procedures as it determines appropriate regarding the Participant’s ability to transfer such shares from such broker account before the expiration of two years from the Grant Date of the Offering Period for which those shares were acquired and one year from the Exercise Date of the Offering Period for which those shares were acquired (provided, that nothing in this Section 10 shall prohibit a sale of such shares by the Participant on the open market or a transfer of such shares upon the death of the Participant).

11. TERMINATION OF EMPLOYMENT; CHANGE IN ELIGIBLE STATUS

(a) General. Except as provided in Section 11(b) below, if a Participant ceases to be an Eligible Employee for any reason (including, without limitation, due to the Participant’s death, disability, resignation or retirement, or due to a layoff or other termination of employment with or without cause), or if the Participant elects to withdraw from the Plan pursuant to Section 7(d), at any time prior to the last day of an Offering Period in which he or she participates, such Participant’s Account shall be paid to him or her (or, in the event of the Participant’s death, to the person or persons entitled thereto under Section 13) in cash, and such Participant’s Option and participation in the Plan shall automatically terminate as of the time that the Participant ceased to be an Eligible Employee.

(b) Change in Eligible Status; Leave. If a Participant (1) ceases to be an Eligible Employee during an Offering Period but remains an employee of the Company or a Subsidiary through the Exercise Date (for example, and without limitation, due to a change in the Participant’s employer from the Company or a Participating Subsidiary to a non-Participating Subsidiary, if the Participant’s employer ceases to maintain the Plan as a Participating Subsidiary but otherwise continues as a Subsidiary, or if the Participant’s customary level of employment no longer satisfies the requirements set forth in the definition of Eligible Employee), or (2) during an Offering Period commences a sick leave, military leave, or other leave of absence approved by the Company or a Participating Subsidiary, and the leave meets the requirements of Treasury Regulation Section 1.421-1(h)(2) and the Participant is an employee of the Company or a Subsidiary or on such leave as of the applicable Exercise Date, such Participant’s Contributions shall cease (subject to Section 7(d)), and the Contributions previously credited to the Participant’s Account for that Offering Period shall be used to exercise the Participant’s Option as of the applicable

Exercise Date in accordance with Section 9 (unless the Participant makes a timely withdrawal election in accordance with Section 7(d), in which case such Participant’s Account shall be paid to him or her in cash in accordance with Section 11(a)).

(c) Re-Enrollment. A Participant’s termination from Plan participation precludes the Participant from again participating in this Plan during that Offering Period. However, such termination shall not have any effect upon his or her ability to participate in any succeeding Offering Period, provided that the applicable eligibility and participation requirements are again then met. A Participant’s termination from Plan participant shall be deemed to be a revocation of that Participant’s Subscription Agreement and such Participant must file a new Subscription Agreement to resume Plan participation in any succeeding Offering Period.

(d) Change in Subsidiary Status. For purposes of this Plan, if a Subsidiary ceases to be a Subsidiary, each person employed by that Subsidiary will be deemed to have terminated employment for purposes of this Plan, unless the person continues as an employee of the Company or another Subsidiary.

12. ADMINISTRATION

(a) The Committee. The Board shall appoint the Committee, which shall be composed of not less than two members of the Board. The Board may, at any time, increase or decrease the number of members of the Committee, may remove from membership on the Committee all or any portion of its members, and may appoint such person or persons as it desires to fill any vacancy existing on the Committee, whether caused by removal, resignation, or otherwise. The Board may also, at any time, assume the administration of all or a part of this Plan, in which case references (or relevant references in the event the Board assumes the administration of only certain aspects of this Plan) to the “Committee” shall be deemed to be references to the Board. Action of the Committee with respect to this Plan shall be taken pursuant to a majority vote or by the unanimous written consent of its members. No member of the Committee shall be entitled to act on or decide any matters relating solely to himself or herself or solely to any of his or her rights or benefits under this Plan.

(b) Powers and Duties of the Committee. Subject to the express provisions of this Plan, the Committee shall supervise and administer this Plan and shall have the full authority and discretion: (1) to construe and interpret this Plan and any agreements defining the rights and obligations of the Company, any Subsidiary, and Participants under this Plan; (2) to further define the terms used in this Plan; (3) to prescribe, amend and rescind rules and regulations relating to the administration of this Plan (including, without limitation, deadlines for making elections or for providing any notices contemplated by this Plan, which deadlines may be more restrictive than any deadlines otherwise contemplated by this Plan); and (4) to make all other determinations and take such other action as contemplated by this Plan or as may be necessary or advisable for the administration of this Plan or the effectuation of its purposes. Notwithstanding anything else contained in this Plan to the contrary, the Committee may also adopt rules, procedures or sub-plans applicable to particular Subsidiaries or locations, which sub-plans may be designed to be outside the scope of Section 423 of the Code and need not comply with the otherwise applicable provisions of this Plan.

(c) Decisions of the Committee are Binding. Any action taken by, or inaction of, the Company, any Subsidiary, the Board or the Committee relating or pursuant to this Plan and within its authority hereunder or under applicable law shall be within the absolute discretion of that entity or body and shall be conclusive and binding upon all persons.

(d) Indemnification. Neither the Board nor any Committee, nor any member thereof or person acting at the direction thereof, shall be liable for any act, omission, interpretation, construction or determination made in good faith in connection with this Plan, and all such persons shall be entitled to indemnification and reimbursement by the Company in respect of any claim, loss, damage or expense (including, without limitation, attorneys’ fees)

arising or resulting therefrom to the fullest extent permitted by law and/or under any directors and officers liability insurance coverage that may be in effect from time to time.

(e) Reliance on Experts. In making any determination or in taking or not taking any action under this Plan, the Committee or the Board, as the case may be, may obtain and may rely upon the advice of experts, including professional advisors to the Company. No director, officer or agent of the Company or any Participating Subsidiary shall be liable for any such action or determination taken or made or omitted in good faith.

(f) Delegation. The Committee may delegate ministerial, non-discretionary functions to individuals who are officers or employees of the Company or a Subsidiary.

13. DESIGNATION OF BENEFICIARY

If the Committee permits beneficiary designations with respect to this Plan, then each Participant may file, on a form and in a manner prescribed by the Committee (or its delegate), a written designation of a beneficiary who is to receive any shares or cash from or with respect to such Participant’s Account under this Plan in the event of such Participant’s death. If a Participant is married and the designated beneficiary is not solely his or her spouse, spousal consent shall be required for such designation to be effective unless it is established (to the satisfaction of the Committee or its delegate) that there is no spouse or that the spouse cannot be located. The Committee may rely on the last designation of a beneficiary filed by a Participant in accordance with this Plan. Beneficiary designations may be changed by the Participant (and his or her spouse, if required) at any time on forms provided and in the manner prescribed by the Committee (or its delegate).

If a Participant dies with no validly designated beneficiary under this Plan who is living at the time of such Participant’s death (or in the event the Committee does not permit beneficiary designations under this Plan), the Company shall deliver all shares and/or cash payable pursuant to the terms hereof to the executor or administrator of the estate of the Participant, or if no such executor or administrator has been appointed, the Company, in its discretion, may deliver such shares and/or cash to the spouse or to any one or more dependents or relatives of the Participant, or if no spouse, dependent or relative is known to the Company, then to such other person as the Company may designate.

If a Participant’s death occurs before the end of an Offering Period or subsequent to the end of an Offering Period but prior to the delivery to him or her or for his or her benefit of any shares deliverable under the terms of this Plan, and the Company has notice of the Participant’s death, then any shares purchased for that Offering Period and any remaining balance of such Participant’s Account shall be paid to such beneficiary (or such other person entitled to such payment pursuant to this Section 13). If the Committee permits beneficiary designations with respect to this Plan, any such designation shall have no effect with respect to shares purchased and actually delivered (or credited, as the case may be) to or for the benefit of the Participant.

14. TRANSFERABILITY

Neither Contributions credited to a Participant’s Account nor any Options or rights with respect to the exercise of Options or right to receive shares under this Plan may be anticipated, alienated, encumbered, assigned, transferred, pledged or otherwise disposed of in any way (other than by will, the laws of descent and distribution, or as provided in Section 13) by the Participant. Any such attempt at anticipation, alienation, encumbrance, assignment, transfer, pledge or other disposition shall be without effect and all amounts shall be paid and all shares shall be delivered in accordance with the provisions of this Plan. Amounts payable or shares deliverable pursuant to this Plan shall be paid or delivered only to (or credited in the name of, as the case may be) the Participant or, in the event of the Participant’s death, the Participant’s beneficiary pursuant to Section 13.

15. USE OF FUNDS; INTEREST

All Contributions received or held by the Company under this Plan will be included in the general assets of the Company and may be used for any corporate purpose. Notwithstanding anything

else contained herein to the contrary, no interest will be paid to any Participant or credited to his or her Account under this Plan (in respect of Account balances, refunds of Account balances, or otherwise). Amounts payable under this Plan shall be payable in shares of Common Stock or from the general assets of the Company and, except for any shares that may be reserved on the books of the Company for issuance with respect to this Plan, no special or separate reserve, fund or deposit shall be made to assure payment of amounts that may be due with respect to this Plan.

16. REPORTS

Statements shall be provided (either electronically or in written form, as the Committee may provide from time to time) to Participants as soon as administratively practicable following each Exercise Date. Each Participant’s statement shall set forth, as of such Exercise Date, that Participant’s Account balance immediately prior to the exercise of his or her Option, the Option Price, the number of whole shares purchased and his or her remaining Account balance, if any.

17. ADJUSTMENTS OF AND CHANGES IN THE STOCK

Upon or in contemplation of any reclassification, recapitalization, stock split (including a stock split in the form of a stock dividend), or reverse stock split; any merger, combination, consolidation, or other reorganization; split-up, spin-off, or any similar extraordinary dividend distribution in respect of the Common Stock (whether in the form of securities or property); any exchange of Common Stock or other securities of the Company, or any similar, unusual or extraordinary corporate transaction in respect of the Common Stock; or a sale of substantially all of the assets of the Company as an entirety occurs; then the Committee shall equitably and proportionately adjust (1) the number and type of shares or the number and type of other securities that thereafter may be made the subject of Options (including the specific maxima and numbers of shares set forth elsewhere in this Plan), (2) the number, amount and type of shares (or other securities or property) subject to any or all outstanding Options, (3) the Option Price of any or all outstanding Options, and/or (4) the securities, cash or other property deliverable upon exercise of any outstanding Options, in each case to the extent necessary to preserve (but not increase) the level of incentives intended by this Plan and the then-outstanding Options.

Upon the occurrence of any event described in the preceding paragraph, or any other event in which the Company does not survive (or does not survive as a public company in respect of its Common Stock); then the Committee may make provision for a cash payment or for the substitution or exchange of any or all outstanding Options for cash, securities or property to be delivered to the holders of any or all outstanding Options based upon the distribution or consideration payable to holders of the Common Stock upon or in respect of such event.

The Committee may adopt such valuation methodologies for outstanding Options as it deems reasonable in the event of a cash or property settlement and, without limitation on other methodologies, may base such settlement solely upon the excess (if any) of the amount payable upon or in respect of such event over the Option Price of the Option.

In any of such events, the Committee may take such action sufficiently prior to such event to the extent that the Committee deems the action necessary to permit the Participant to realize the benefits intended to be conveyed with respect to the underlying shares in the same manner as is or will be available to stockholders generally.

18. POSSIBLE EARLY TERMINATION OF PLAN AND OPTIONS

Upon a dissolution or liquidation of the Company, or any other event described in Section 17 that the Company does not survive or does not survive as a publicly-traded company in respect of its Common Stock, as the case may be, the Plan and, if prior to the last day of an Offering Period, any outstanding Option granted with respect to that Offering Period shall terminate, subject to any provision that has been expressly made by the Board for the survival, substitution, assumption, exchange or other settlement of the Plan and Options. In the event a Participant’s Option is terminated pursuant to this Section 18 without a provision having been made by the Board for a substitution, exchange or other settlement of the Option, such Participant’s Account shall be paid to him or her in cash without interest.

19. TERM OF PLAN; AMENDMENT OR TERMINATION

(a) Effective Date; Termination. Subject to Section 19(b), this Plan shall become effective as of the Effective Date. No new Offering Periods shall commence on or after March 1, 2020 and this Plan shall terminate as of the Exercise Date on or immediately following such date unless sooner terminated pursuant to Section 18 or this Section 19. In the event that all of the shares of Common Stock made available under this Plan are subscribed prior to the expiration of this Plan, this Plan shall terminate at the end of that Offering Period and the shares available shall be allocated for purchase by Participants in that Offering Period on a pro-rata basis determined with respect to Participants’ Account balances.

(b) Board Amendment Authority. The Board may, at any time, terminate or, from time to time, amend, modify or suspend this Plan, in whole or in part and without notice. Stockholder approval for any amendment or modification shall not be required, except to the extent required by law or applicable stock exchange rules, or required under Section 423 of the Code in order to preserve the intended tax consequences of this Plan. No Options may be granted during any suspension of this Plan or after the termination of this Plan, but the Committee will retain jurisdiction as to Options then outstanding in accordance with the terms of this Plan. No amendment, modification, or termination pursuant to this Section 19(b) shall, without written consent of the Participant, affect in any manner materially adverse to the Participant any rights or benefits of such Participant or obligations of the Company under any Option granted under this Plan prior to the effective date of such change. Changes contemplated by Section 17 or Section 18 shall not be deemed to constitute changes or amendments requiring Participant consent.

(c) Certain Additional Committee Authority. Notwithstanding the amendment provisions of Section 19(b) and without limiting the Board’s authority thereunder and without limiting the Committee’s authority pursuant to any other provision of this Plan, the Committee shall have the right (1) to designate from time to time the Subsidiaries whose employees may be eligible to participate in this Plan (including, without limitation, any Subsidiary that may first become such after the date stockholders first approve this Plan) (each a “Participating Subsidiary”), and (2) to change the service and other qualification requirements sets forth under the definition of Eligible Employee in Section 2 (subject to the requirements of Section 423(b) of the Code and applicable rules and regulations thereunder). Any such change shall not take effect earlier than the first Offering Period that starts on or after the effective date of such change. Any such change shall not require stockholder approval.

20. NOTICES

All notices or other communications by a Participant to the Company contemplated by this Plan shall be deemed to have been duly given when received in the form and manner specified by the Committee (or its delegate) at the location, or by the person, designated by the Committee (or its delegate) for that purpose.

21. CONDITIONS UPON ISSUANCE OF SHARES

This Plan, the granting of Options under this Plan and the offer, issuance and delivery of shares of Common Stock are subject to compliance with all applicable federal and state laws, rules and regulations (including but not limited to state and federal securities laws) and to such approvals by any listing, regulatory or governmental authority as may, in the opinion of counsel for the Company, be necessary or advisable in connection therewith. The person acquiring any securities under this Plan will, if requested by the Company and as a condition precedent to the exercise of his or her Option, provide such assurances and representations to the Company as the Committee may deem necessary or desirable to assure compliance with all applicable legal requirements.

22. PLAN CONSTRUCTION

(a) Section 16. It is the intent of the Company that transactions involving Options under this Plan (other than “Discretionary Transactions” as that term is defined in Rule 16b-3(b)(1) promulgated by the Commission under Section 16 of the Exchange Act, to the extent there are any Discretionary Transactions under the Plan), in the case of Participants who are or may be subject to the prohibitions of Section 16 of the Exchange Act, satisfy the requirements for exemption under Rule 16b-3(c) promulgated by the Commission under Section 16 of the Exchange Act to the maximum extent possible. Notwithstanding the foregoing, the Company shall have no liability to any Participant for Section 16 consequences of Options or other events with respect to this Plan.

(b) Section 423. Except as the Committee may expressly provide in the case of one or more sub-plans adopted pursuant to Section 12(b), this Plan and Options are intended to qualify under Section 423 of the Code. Accordingly, all Participants are to have the same rights and privileges (within the meaning of Section 423(b)(5) of the Code and except as not required thereunder to qualify this Plan under Section 423) under this Plan, subject to differences in Compensation among Participants and subject to the Contribution and share limits of this Plan.

(c) Interpretation. If any provision of this Plan or of any Option would otherwise frustrate or conflict with the intents expressed above, that provision to the extent possible shall be interpreted so as to avoid such conflict. If the conflict remains irreconcilable, the Committee may disregard the provision if it concludes that to do so furthers the interest of the Company and is consistent with the purposes of this Plan as to such persons in the circumstances.

23. EMPLOYEES’ RIGHTS

(a) No Employment Rights. Nothing in this Plan (or in any Subscription Agreement or other document related to this Plan) will confer upon any Eligible Employee or Participant any right to continue in the employ or other service of the Company or any Subsidiary, constitute any contract or agreement of employment or other service or effect an employee’s status as an employee at will, nor shall interfere in any way with the right of the Company or any Subsidiary to change such person’s compensation or other benefits or to terminate his or her employment or other service, with or without cause. Nothing contained in this Section 23(a), however, is intended to adversely affect any express independent right of any such person under a separate employment or service contract other than a Subscription Agreement.

(b) No Rights to Assets of the Company. No Participant or other person will have any right, title or interest in any fund or in any specific asset (including shares of Common Stock) of the Company or any Subsidiary by reason of any Option hereunder. Neither the provisions of this Plan (or of any Subscription Agreement or other document related to this Plan), nor the creation or adoption of this Plan, nor any action taken pursuant to the provisions of this Plan will create, or be construed to create, a trust of any kind or a fiduciary relationship between the Company or any Subsidiary and any Participant, Beneficiary or other person. To the extent that a Participant, Beneficiary or other person acquires a right to receive payment pursuant to this Plan, such right will be no greater than the right of any unsecured general creditor of the Company.

(c) No Stockholder Rights. A Participant will not be entitled to any privilege of stock ownership as to any shares of Common Stock not actually delivered to and held of record by the Participant. No adjustment will be made for dividends or other rights as a stockholder for which a record date is prior to such date of delivery.

24. MISCELLANEOUS

(a) Governing Law. This Plan, the Options, Subscription Agreements and other documents related to this Plan shall be governed by, and construed in accordance with, the laws of the State of Delaware.

(b) Severability. If any provision shall be held by a court of competent jurisdiction to be invalid and unenforceable, the remaining provisions of this Plan shall continue in effect.

(c) Captions and Headings. Captions and headings are given to the sections of this Plan solely as a convenience to facilitate reference. Such captions and headings shall not be deemed in any way material or relevant to the construction of interpretation of this Plan or any provision hereof.

(d) No Effect on Other Plans or Corporate Authority. The adoption of this Plan shall not affect any other Company or Subsidiary compensation or incentive plans in effect. Nothing in this Plan will limit or be deemed to limit the authority of the Board or Committee (1) to establish any other forms of incentives or compensation for employees of the Company or any Subsidiary (with or without reference to the Common Stock), or (2) to grant or assume options (outside the scope of and in addition to those contemplated by this Plan) in connection with any proper corporate purpose; to the extent consistent with any other plan or authority. Benefits received by a Participant under an Option granted pursuant to this Plan shall not be deemed a part of the Participant’s compensation for purposes of the determination of benefits under any other employee welfare or benefit plans or arrangements, if any, provided by the Company or any Subsidiary, except where the Committee or the Board (or the Board of Directors of the Subsidiary that sponsors such plan or arrangement, as applicable) expressly otherwise provides or authorizes in writing.

25. TAX WITHHOLDING

Notwithstanding anything else contained in this Plan herein to the contrary, the Company may deduct from a Participant’s Account balance as of an Exercise Date, before the exercise of the Participant’s Option is given effect on such date, the amount of taxes (if any) which the Company reasonably determines it or any Subsidiary may be required to withhold with respect to such exercise. In such event, the maximum number of whole shares subject to such Option (subject to the other limits set forth in this Plan) shall be purchased at the Option Price with the balance of the Participant’s Account (after reduction for tax withholding amount).

Should the Company for any reason be unable, or elect not to, satisfy its or any Subsidiary’s tax withholding obligations in the manner described in the preceding paragraph with respect to a Participant’s exercise of an Option, or should the Company or any Subsidiary reasonably determine that it or an affiliated entity has a tax withholding obligation with respect to a disposition of shares acquired pursuant to the exercise of an Option prior to satisfaction of the holding period requirements of Section 423 of the Code, the Company or Subsidiary, as the case may be, shall have the right at its option to (1) require the Participant to pay or provide for payment of the amount of any taxes which the Company or Subsidiary reasonably determines that it or any affiliate is required to withhold with respect to such event or (2) deduct from any amount otherwise payable to or for the account of the Participant the amount of any taxes which the Company or Subsidiary reasonably determines that it or an affiliate is required to withhold with respect to such event.

26. NOTICE OF SALE

Any person who has acquired shares under this Plan shall give prompt written notice to the Company of any sale or other transfer of the shares if such sale or transfer occurs (1) within the two-year period after the Grant Date of the Offering Period with respect to which such shares were acquired, or (2) within the twelve-month period after the Exercise Date of the Offering Period with respect to which such shares were acquired.

EX-10.23

ALASKA AIR GROUP PERFORMANCE BASED PAY PLAN

(Amended and Restated June 19, 2015)

The Board of Directors (the “Board”) of Alaska Air Group, Inc. (the “Company”) has adopted the Performance-Based Pay Plan (the “Plan”) to reward employees of Alaska Airlines, Inc. (“Alaska”) and Horizon Air Industries, Inc. (“Horizon”). The Board has delegated authority to the Compensation and Leadership Development Committee (the “Committee”) to administer the Plan. The Performance Based Pay Award (“Award”) of each eligible Plan Participant will depend upon the degree to which the Company, Alaska, and Horizon achieve the performance goals and, if applicable, an award modifier, set by the Committee for each calendar year (a “Plan Year”) and upon the discretion of the Committee as explained below.

At the beginning of each Plan Year, the Committee will determine the elected officers and employees of Alaska and Horizon to whom Awards will be granted for that Plan Year that are intended to qualify as performance-based compensation within the meaning of Section 162(m) of the Internal Revenue Code (“Section 162(m)”). Such Awards (“Section 162(m) Awards”) will be granted pursuant to, and subject to the limitations and requirements of Section 5.1.4 and 5.2 of the Alaska Air Group, Inc. 2008 Performance Incentive Plan (the “2008 PIP”), as last approved by the Company’s stockholders on May 17, 2011 (including the limit on the maximum per-person Award of $1 million per year, established by Section 5.2.3 of the 2008 PIP).

This Amended and Restated Plan is effective beginning with the 2015 Plan Year and each year thereafter until amended, restated or terminated, pursuant to Paragraph 8.

1. ELIGIBILITY

Eligibility to participate in the Plan during a Plan Year is limited to U.S. and Canadian employees, and Mexico management employees, of Alaska and Horizon (“Eligible Employees”) who:

(a) are employees of Alaska or Horizon on December 31 of the Plan Year for which the Award is being paid, or

(b) were employees during a portion of the Plan Year for which the Award is being paid but were not employees on December 31 because their employment ended due to retirement, disability or death. (For example, if an employee retires from Alaska or Horizon and his/her last day of employment is on or between January 1 and December 31, 2014, he/she would be eligible for an award for the 2014 Plan Year, but would not be eligible for an Award for the 2015 Plan Year because he/she was not an employee during any part of the 2015 Plan Year, even though his/her first day of retirement might be January 1, 2015.)

Eligible Employees who are on temporary medical leave, military leave, furlough, or company-approved leave of absence as of December 31 of the Plan Year shall remain eligible under the Plan. Unless otherwise provided in a separate agreement, an individual whose employment with Alaska or Horizon ends prior to December 31 of the Plan Year for any reason not set forth above, for example, resignation or termination (with or without cause), forfeits any Award under this Plan. In addition, employees terminated for cause, as determined by Alaska or Horizon, shall forfeit any Award under this Plan, regardless of their employment status on December 31 of the Plan Year. Notwithstanding the foregoing, contract employees or independent contractors as classified by Alaska or Horizon, shall be excluded from participation hereunder, regardless of whether an agency or court subsequently re-classifies such individuals as employees of Alaska or Horizon. An Eligible Employee who meets all the requirements for an Award is a “Plan Participant” for such Plan Year. Participation in the Plan does not guarantee that any Award will be paid if applicable performance goals specified for the Plan Year are not achieved for the year.

2. CALCULATION OF THE AWARD

The size of the Award earned for a Plan Year will depend upon the extent to which the performance goals and, if applicable, an award modifier have been achieved during that Plan Year, and upon the discretion of the Committee. Separate performance weighting has been established for each performance goal.

A Plan Participant’s Award is determined by the following formula: Eligible Earnings X Participation Rate X Payout Award Percentage.

“Eligible Earnings” means the aggregate wages or salary paid during the Plan Year to the Plan Participant for services performed for Alaska or Horizon, including cash received for vacation payouts in connection with the Plan Participant’s transfer between Alaska and Horizon or in connection with retirement, death or disability, amounts that the Plan Participant could have received in cash had the Plan Participant not elected to contribute the amount to an employee benefit plan

maintained by the Company or an affiliate and any other voluntary payment the Plan Participant makes which reduces his/her compensation (such as the Plan Participant’s voluntary contribution to an Internal Revenue Code (“Code”) Section 401(k) Plan, Code Section 125 medical account, dependent day care spending account, or charitable gift), but excluding commissions, all bonuses (including any payment received under this Plan), and all other forms of incentive or other supplemental pay, employee benefits paid by the employer (such as employer contributions to a Code Section 401(k) Plan), worker’s compensation payments, disability payments, cash and non-cash fringe benefits and perquisites (such as per diems, auto expense reimbursement, relocation reimbursement or travel reimbursement).

“Participation Rate” shall mean the percentage level communicated to each Eligible Employee or class of Eligible Employee.

“Payout Award Percentage” means the sum of the weighted payout of each performance goal, calculated in the manner specified by Paragraph 3, herein. However, in the case of an elected officer of Alaska or Horizon, the Plan Participant’s Award under this Plan, is limited to three times the elected officer’s Eligible Earnings for the Plan Year, and is further limited as set forth in Paragraph 6 hereof. Awards may be paid in cash only.

All calculations will be performed by the Finance Department of Alaska and will be subject to approval by the Committee (such approval by the Committee to be in writing in the case of Section 162(m) Awards consistent with the requirements of Section 162(m)). Once approved by the Committee, such calculations shall be conclusively presumed to be accurate.

3. PERFORMANCE WEIGHTING

In order for any Award to be payable as to a particular performance goal, a “Threshold” performance level for that goal must be achieved. The payout percentage for a particular performance goal will be 25% if the “Threshold” level is reached, 100% if the “Target” level is reached, and 200% if the “Maximum” level is achieved. This determination applies to each goal individually. If performance for a particular goal is between the Threshold and Target levels, or between the Target and Maximum levels, the payout percentage for that goal will be determined by linear interpolation between those two levels. The payout percentage for each goal as so determined will then be multiplied by the weighting factor for that goal, as specified in Annex 1 Performance-Based Pay Plan Goals and Measures described in Paragraph 4 for the applicable Plan Year (the “weighted payout percentages”).

4. PERFORMANCE GOALS AND APPLICABLE PERFORMANCE WEIGHTING FACTORS

The Committee will establish the performance goals and, if applicable, an award modifier for each Plan Year during the life of this Plan, and will annually approve an Annex 1 Performance-Based Pay Plan Goals and Measures to this Plan that outlines the performance goals, award modifiers and the weighting factors and an Annex 2 Performance-Based Pay Plan Participation Rates.

5. DISCRETIONARY FACTOR

In the case of a Plan Participant described in Paragraph 1 who retired, terminated employment due to disability, or died during the year, or a Plan Participant who took a leave of absence or worked a reduced schedule during any portion of the year, the Committee retains absolute discretionary authority to adjust the Award to such Plan Participant based upon the Committee’s determination of such Plan Participant’s contribution to the Company or its affiliates or any other factors as the Committee may determine appropriate. However, in the case of Awards to any elected officer of Alaska or Horizon, the Award cannot be increased above the amount authorized in the original grant; and, in the case of Section 162(m) Awards payable after retirement or any other termination of employment (other than due to the Plan Participant’s death or disability), the Committee has discretion only to reduce (but not increase) the amount that would otherwise be payable under the Award based on achievement of the applicable performance goals. Moreover, the amount of any Award payable for the Plan Year to any elected officer whose Award might potentially be subject to the deduction limitations of Code Section 162(m) cannot exceed the maximum limit on any such individual’s Award of $1 million per year, established by Section 5.2.3 of the 2008 PIP.

6. TIMING OF AWARDS

Payment of Awards for a Plan Year will be made no later than March 15 of the following year. A deceased Plan Participant's Award will be paid to the beneficiary designated by the Participant for purposes of the Company's or its affiliates’ group term life insurance plans covering the deceased Participant, and in the absence of any designation, will be paid or distributed to the Participant’s estate.

7.PLAN PARTICIPANT TRANSFERS BETWEEN ALASKA AND HORIZON

If a Plan Participant transfers between Alaska and Horizon, the Plan Participant’s Award under this Plan, and any payment in respect of such Award, shall be separately determined by the Committee based on Eligible Earnings, Participation Rate

and Payout Award Percentage attributable to each entity. This will result in a separate Award based on Alaska service and performance and a separate Award based on Horizon service and performance.

8. AMENDMENT

The Board, acting on its own or through the Committee, retains the right to modify the Plan at any time in any manner that it deems appropriate, provided that (a) no amendment that adversely affects the rights of Plan Participants or their beneficiaries shall be effective for a Plan Year that ended prior to the Plan Year in which the amendment was adopted, and (b) it will not terminate the Plan for any Plan Year during that Plan Year unless it is clear that Plan Participants will not receive any payment with respect to Awards granted for that Plan Year.

9.CLAWBACK POLICY.

The Award is subject to the terms of the Company’s recoupment, clawback or similar policy as it may be in effect from time to time, as well as any similar provisions of applicable law, any of which could in certain circumstances require forfeiture of the Award and repayment or forfeiture of any cash received with respect to the Award.

10.MISCELLANEOUS

a. This Plan, including its attachments, constitutes the entire understanding relating to an Award to any employee of Alaska or Horizon, and supersedes all prior oral or written agreements, representations or commitments relating to such Awards.

b. This Plan is not a commitment of the Company, Alaska or Horizon, to any officer or employee of such company, to continue that individual in its employ in order to qualify for an Award. Nothing contained in this Plan may be considered to be a promise of continued employment. Any employee who shall file suit against his or her employer for wrongful termination shall automatically cease to be a Plan Participant.

c. This Plan and the rights and obligations provided for herein shall be construed and interpreted in accordance with the law of the state of Washington, excluding its conflicts of law rules.

d. No unpaid Award will be subject to the debts, liabilities, contracts or engagements of any Plan Participant, and may not be alienated, pledged, garnished or sold, and any attempt to do so shall be void.

e. All Awards are subject to applicable federal, state, and local deductions.

f. This Plan is intended to be an exception to, or otherwise be in compliance with, Section 409A of the Internal Revenue Code of 1986, as amended. This Plan shall be interpreted to comply with Section 409A. Further, it is the intent of the Company that, in the case of Section 162(m) Awards, this Plan, each such Award, any amounts paid with respect to such Awards, shall qualify as performance-based compensation or will otherwise be exempt from deductibility limitations under Section 162(m). Any provision, application or interpretation of this Plan inconsistent with this intent to satisfy the standards in Section 162(m) as to the Section 162(m) Awards shall be disregarded.

Dated: June 19, 2015        

Alaska Air Group, Inc.

______________________________

J. Kenneth Thompson

Chairman

Compensation and Leadership Development Committee

ANNEX 1

PERFORMANCE BASED PAY PLAN GOALS AND MEASURES FOR 2016

This Annex sets forth the goals for the Alaska Air Group Performance Based Pay Plan for the 2016 Plan year.

The performance goals for 2016 are divided into two groups: Operational Performance and Financial Performance. The Operational Performance goals, which are based on safety, employee engagement and cost per available seat mile (CASM) measures, represent 30% of the total weight. The Financial Performance goal is based on the Company’s profitability and represents 70% of the total weight.

a. Operational Performance. Operational Performance is equally divided into three categories:

1. Safety (10%)

No award for Safety will be earned by any Alaska or Horizon employee if there is an on-the-job employee fatality or operation-related passenger fatality. The Compensation and Leadership Development Committee retains discretion to determine whether a passenger fatality is operation-related.

A Safety payout requires the attainment of stated goals for “Level 3” safety events during the Plan year.

For Alaska:

Threshold 4 or fewer “Level 3” safety events

Target 3 or fewer “Level 3” safety events

Maximum 1 or fewer “Level 3” safety events

For Horizon:

Threshold 4 or fewer “Level 3” safety events

Target 3 or fewer “Level 3” safety events

Maximum 1 or fewer “Level 3” safety events

2.Employee Engagement/Customer Satisfaction (10%)

Employee Engagement/Customer Satisfaction will be measured by the number of times each airline meets or exceeds the monthly Operational Performance Rewards (OPR) Customer Satisfaction goal. The OPR goal is measured through online surveys of recent customers and is based 50% on employee attitude, courtesy and helpfulness, 25% on satisfaction on the most recent flight, and 25% on satisfaction over the past 12 months.

For Alaska:

Threshold Total of 6 months with OPR score of 85% or higher

Target Total of 8 months with OPR score of 85% or higher

Maximum Total of 11 months with OPR score of 85% or higher

For Horizon:

Threshold Total of 6 months with OPR score of 85% or higher

Target Total of 8 months with OPR score of 85% or higher

Maximum Total of 11 months with OPR score of 85% or higher

3. CASM (cost per available seat mile) ex. fuel (10%).

CASM calculations exclude fuel costs and may be adjusted for certain Excluded Items and Alternative Accounting Treatments (as defined below), as appropriate at the discretion of the Compensation Committee.

Alaska CASM ex. fuel:

Threshold 7.45¢

Target 7.35¢

Maximum 7.25¢

Horizon CASMxx*:

Threshold 13.15¢

Target12.95¢

Maximum 12.75¢

*CASM ex. Fuel (pre-Capacity Purchase Agreement) and excluding one-time transition items related to Horizon Air restructuring

b. Financial Performance. (70% of the total)

Financial Performance is measured by the Company’s Profitability.

Alaska Air Group Profitability (70% of the total).

The Profitability measure is the Adjusted Pre-Tax Profit of the Company, as defined below.

Threshold $ 450 million

Target $ 775 million

Maximum$ 1.7 billion

“Adjusted Pretax Profit” means the net income of Alaska Air Group, Inc. as computed under Generally Accepted Accounting Principles (GAAP), adjusted for Excluded Items and Alternative Accounting Treatments and for fuel expense variances from budget greater than $100 million resulting from jet fuel price volatility. “Excluded Items” means (a) income taxes, (b) pretax expense under any Alaska Air Group (or subsidiary) performance-based pay, operational performance rewards, or similar such programs as determined in the discretion of the Compensation Committee, and (c) special income or expense items that, in the discretion of the Compensation Committee, should be excluded because recognizing them would not appropriately serve the goals of the Plan. These may include, without limitation, gain or loss on disposition of capital assets, impairments or other fleet exit costs, expenses from voluntary or involuntary severance programs, significant curtailment gains or losses from retirement plans, the impact of changes in accounting principle, government refunds or assistance and cumulative effect of accounting changes. “Alternative Accounting Treatments” means expense or income items that, for purposes of calculating Adjusted Pretax Profit, the Company (or any subsidiary) will account for based on non-GAAP methods because, in the discretion of the Compensation Committee, using GAAP accounting methods would not appropriately serve the goals of the Plan. These may include, without limitation, fuel hedge accounting on an “as settled” basis.

ANNEX 2

PERFORMANCE BASED PAY PLAN PARTICIPATION RATES

This Annex sets forth Participation Rates in connection with the Performance-Based Pay Plan, effective with the beginning of the 2016 Play Year.

Pay Group/Position	Participation Rate
ALASKA CHIEF EXECUTIVE OFFICER	120%
ALASKA PRESIDENT	90%
ALASKA EXECUTIVE VICE PRESIDENTS	85%
ALASKA SENIOR VICE PRESIDENTS	75%
HORIZON AIR PRESIDENT	75%
ALASKA VICE PRESIDENTS SERVING ON MANAGEMENT’S EXECUTIVE COMMITTEE	65%
ALASKA AND HORIZON VICE PRESIDENTS	50%
ALASKA AND HORIZON MANAGING DIRECTORS	35%
ALASKA AND HORIZON DIRECTORS	15%
ALASKA AND HORIZON MANAGERS AND SUPERVISORS*	7.5%
OTHER ALASKA AND HORIZON PARTICIPANTS	5%
*Includes managers and supervisors with direct reports, employees in Grade Level I (Alaska) or Level 117 (Horizon) and above, and managers and supervisors whose core responsibility is leading vendor/contractor teams in their daily work.

Approved by the Compensation and Leadership Development Committee 5/12/16

Supersedes and replaces the rates approved on 3/24/16

EX-21

EXHIBIT 21

SUBSIDIARIES OF ALASKA AIR GROUP, INC.

Name	State of Incorporation
Alaska Airlines, Inc.	Alaska
Virgin America Inc.	Delaware
Horizon Air Industries, Inc.	Washington
McGee Air Services, Inc. (a)	Delaware
ASA Assurance, Inc.	Hawaii
Air Group Leasing, Inc.	Delaware

(a) McGee Air Services, Inc. is a subsidiary of Alaska Airlines, Inc.

EX-23.1

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

Alaska Air Group, Inc.:

We consent to the incorporation by reference in the registration statements (Nos. 333‑212657, 333‑176051, 333‑168293, and 333‑151743) on Form S‑8 of Alaska Air Group, Inc. (the Company) of our reports dated February 28, 2017, with respect to the consolidated balance sheets of Alaska Air Group, Inc. as of December 31, 2016 and 2015, and the related consolidated statements of operations, comprehensive operations, shareholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2016, and the effectiveness of internal control over financial reporting as of December 31, 2016, which reports appear in the December 31, 2016 annual report on Form 10‑K of Alaska Air Group, Inc.

Our report dated February 28, 2017 on the effectiveness of internal control over financial reporting as of December 31, 2016 contains an explanatory paragraph that states that the Company acquired Virgin America Inc. (Virgin America) during 2016, and management excluded from its assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2016, Virgin America’s internal control over financial reporting associated with total assets that represented approximately 33% of the Company’s consolidated assets, and revenue that represented approximately 2% of the Company’s consolidated operating revenues included in the consolidated financial statements of the Company and subsidiaries as of and for the year ended December 31, 2016. Our audit of internal control over financial reporting of Alaska Air Group, Inc. also excluded an evaluation of the internal control over financial reporting of Virgin America.

/s/ KPMG LLP

Seattle, Washington

February 28, 2017

EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

I, Bradley D. Tilden, certify that:

1. I have reviewed this annual report on Form 10-K of Alaska Air Group, Inc. for the period ended December 31, 2016;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

e) The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

February 28, 2017

By:	/s/ BRADLEY D. TILDEN
	Bradley D. Tilden
	Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATIONS

I, Brandon S. Pedersen, certify that:

1. I have reviewed this annual report on Form 10-K of Alaska Air Group, Inc. for the period ended December 31, 2016;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and we have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

February 28, 2017

By:	/s/ BRANDON S. PEDERSEN
	Brandon S. Pedersen
	Executive Vice President/Finance and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Alaska Air Group, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Bradley D. Tilden, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 28, 2017

By:	/s/ BRADLEY D. TILDEN
	Bradley D. Tilden
	Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Alaska Air Group, Inc. (the “Company”) on Form 10-K for the period ended December 31, 2016 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brandon S. Pedersen, Executive Vice President/Finance and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 28, 2017

By:	/s/ BRANDON S. PEDERSEN
	Brandon S. Pedersen
	Executive Vice President/Finance and Chief Financial Officer

XML

DOCUMENT AND ENTITY INFORMATION - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2016	Feb. 22, 2017	Jun. 30, 2015
Entity Information [Line Items]
Entity Registrant Name	ALASKA AIR GROUP, INC.
Entity Central Index Key	0000766421
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		123,468,367
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 7.1
Document Period End Date	Dec. 31, 2016

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 328	$ 73
Marketable securities	1,252	1,255
Total cash and marketable securities	1,580	1,328
Receivables—less allowance for doubtful accounts of $1 and $1	302	212
Inventories and supplies—net	47	51
Prepaid expenses and other current assets	121	72
Total Current Assets	2,050	1,663
Property and Equipment
Aircraft and other flight equipment	6,947	5,690
Other property and equipment	1,103	955
Deposits for future flight equipment	545	771
Property and Equipment	8,595	7,416
Less accumulated depreciation and amortization	2,929	2,614
Total Property and Equipment—Net	5,666	4,802
Other Assets [Abstract]
Goodwill	1,934	0
Intangible assets	143	0
Other noncurrent assets	169	65
Total Other Assets	2,246	65
Total Assets	9,962	6,530
Current Liabilities
Accounts payable	92	63
Accrued wages, vacation and payroll taxes	397	298
Other accrued liabilities	878	661
Air traffic liability	849	669
Current portion of long-term debt	319	114
Total Current Liabilities	2,535	1,805
Long-Term Debt, Net of Current Portion	2,645	569
Other Liabilities and Credits
Deferred income taxes	463	682
Deferred revenue	640	431
Obligation for pension and postretirement medical benefits	331	270
Other liabilities	417	362
Other Liabilities and Credits Totals	1,851	1,745
Commitments and Contingencies
Shareholders' Equity
Preferred stock, $0.01 par value, Authorized: 5,000,000 shares, none issued or outstanding	0	0
Common stock, $0.01 par value, Authorized: 200,000,000 shares, Issued: 2016 - 129,189,634 shares; 2015 - 128,442,099 shares, Outstanding: 2016 - 123,328,051 shares; 2015 - 125,175,325 shares	1	1
Capital in excess of par value	110	73
Treasury stock (common), at cost: 2016 - 5,861,583 shares; 2015 - 3,266,774 shares	(443)	(250)
Accumulated other comprehensive loss	(305)	(303)
Retained earnings	3,568	2,890
Shareholders' Equity Total	2,931	2,411
Total Liabilities and Shareholders' Equity	$ 9,962	$ 6,530

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts	$ 1	$ 1
Stockholders' Equity:
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	129,189,634	128,442,099
Common Stock, Shares, Outstanding	123,328,051	125,175,325
Treasury Stock, Shares	5,861,583	3,266,774

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Revenues
Passenger, Mainline	$ 4,098	$ 3,939	$ 3,774
Passenger, Regional	908	854	805
Total passenger revenue	5,006	4,793	4,579
Freight and mail	108	108	114
Other—net	817	697	675
Total Operating Revenues	5,931	5,598	5,368
Operating Expenses
Wages and benefits	1,382	1,254	1,136
Variable incentive pay	127	120	116
Aircraft fuel, including hedging gains and losses	831	954	1,418
Aircraft maintenance	270	253	229
Aircraft rent	114	105	110
Landing fees and other rentals	320	296	279
Contracted services	247	214	196
Selling expenses	225	211	199
Depreciation and amortization	363	320	294
Food and beverage service	126	113	93
Third-party regional carrier expense	95	72	58
Third-party regional carrier expense	365	356	308
Special items—merger-related costs and other	117	32	(30)
Total Operating Expenses	4,582	4,300	4,406
Operating Income	1,349	1,298	962
Nonoperating Income (Expense)
Interest income	27	21	21
Interest expense	(55)	(42)	(48)
Interest capitalized	25	34	20
Other—net	(1)	1	20
Nonoperating Income (Expense) Total	(4)	14	13
Income before income tax	1,345	1,312	975
Income tax expense	531	464	370
Net Income	$ 814	$ 848	$ 605
Basic Earnings Per Share:	$ 6.59	$ 6.61	$ 4.47
Diluted Earnings Per Share:	$ 6.54	$ 6.56	$ 4.42
Shares used for computation:
Basic	123,557	128,373	135,445
Diluted	124,389	129,372	136,801
Cash dividend declared per share	$ 1.10	$ 0.80	$ 0.50

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net Income	$ 814	$ 848	$ 605
Related to marketable securities:
Unrealized holding gains (losses) arising during the period	1	(6)	2
Reclassification of (gains) losses into Other-net nonoperating income (expense)	(1)	1	(2)
Income tax benefit (expense)	0	2	0
Marketable securities, net of tax	0	(3)	0
Related to employee benefit plans:
Actuarial gains (losses) related to pension and other postretirement benefit plans	(43)	10	(210)
Reclassification of net pension expense into Wages and benefits	20	14	9
Income tax benefit (expense)	12	(14)	76
Total	(11)	10	(125)
Related to interest rate derivative instruments:
Unrealized holding gains (losses) arising during the period	8	(5)	(8)
Reclassification of losses into Aircraft rent	6	6	6
Income tax benefit (expense)	(5)	(1)	0
Interest rate derivative instruments, net of tax	9	0	(2)
Other comprehensive loss	(2)	7	(127)
Comprehensive income	$ 812	$ 855	$ 478

XML

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss	Retained Earnings
Stockholders' Equity at Dec. 31, 2013	$ 2,029	$ 1	$ 606	$ (2)	$ (183)	$ 1,607
Common Stock Outstanding at Dec. 31, 2013		137,492,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	605					605
Other comprehensive loss	$ (127)				(127)
Common stock repurchase (in shares)	(7,316,731)	(7,317,000)
Common stock repurchase	$ (348)		(346)	(2)
Stock-based compensation	16		16
Cash dividend declared	(68)					(68)
Stock issued for employee stock purchase plan (in shares)		299,000
Stock issued for employee stock purchase plan	9		9
Stock issued under stock plans (in shares)		1,007,000
Stock issued under stock plans	11		11
Stockholders' Equity at Dec. 31, 2014	2,127	$ 1	296	(4)	(310)	2,144
Common Stock Outstanding at Dec. 31, 2014		131,481,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	848					848
Other comprehensive loss	$ 7				7
Common stock repurchase (in shares)	(7,208,328)	(7,208,000)
Common stock repurchase	$ (505)		(259)	(246)
Stock-based compensation	17		17
Cash dividend declared	(102)					(102)
Stock issued for employee stock purchase plan (in shares)		281,000
Stock issued for employee stock purchase plan	13		13
Stock issued under stock plans (in shares)		621,000
Stock issued under stock plans	6		6
Stockholders' Equity at Dec. 31, 2015	$ 2,411	$ 1	73	(250)	(303)	2,890
Common Stock Outstanding at Dec. 31, 2015	125,175,325	125,175,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	$ 814					814
Other comprehensive loss	$ (2)				(2)
Common stock repurchase (in shares)	(2,594,809)	(2,595,000)
Common stock repurchase	$ (193)		0	(193)
Stock-based compensation	19		19
Cash dividend declared	(136)					(136)
Stock issued for employee stock purchase plan (in shares)		309,000
Stock issued for employee stock purchase plan	17		17
Stock issued under stock plans (in shares)		439,000
Stock issued under stock plans	1		1
Stockholders' Equity at Dec. 31, 2016	$ 2,931	$ 1	$ 110	$ (443)	$ (305)	$ 3,568
Common Stock Outstanding at Dec. 31, 2016	123,328,051	123,328,000

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net Income	$ 814	$ 848	$ 605
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	363	320	294
Stock-based compensation and other	26	25	6
Changes in certain assets and liabilities:
Changes in deferred tax provision	94	56	114
(Increase) decrease in accounts receivable	(46)	47	(110)
Increase (decrease) in air traffic liability	9	38	67
Increase (decrease) in deferred revenue	83	57	40
Changes in pension and other postretirement benefits	23	36	(18)
Other—net	20	157	32
Net cash provided by operating activities	1,386	1,584	1,030
Property and equipment additions:
Aircraft and aircraft purchase deposits	(528)	(681)	(498)
Other flight equipment	(53)	(79)	(131)
Other property and equipment	(97)	(71)	(65)
Total property and equipment additions	(678)	(831)	(694)
Acquisition of Virgin America, net of cash acquired	(1,951)	0	0
Purchases of marketable securities	(960)	(1,327)	(949)
Sales and maturities of marketable securities	962	1,175	1,092
Proceeds from disposition of assets and changes in restricted deposits	5	53	10
Net cash used in investing activities	(2,622)	(930)	(541)
Cash flows from financing activities:
Proceeds from issuance of long-term debt, net of issuance costs	2,044	0	51
Long-term debt payments	(249)	(116)	(119)
Common stock repurchases	(193)	(505)	(348)
Cash dividend paid	(136)	(102)	(68)
Other financing activities	25	35	22
Net cash provided by (used in) financing activities	1,491	(688)	(462)
Net increase (decrease) in cash and cash equivalents	255	(34)	27
Cash and cash equivalents at beginning of year	73	107	80
Cash and cash equivalents at end of year	328	73	107
Cash paid during the year for:
Interest, net of amount capitalized	24	8	28
Income taxes, net of refunds received	$ 459	$ 349	$ 326

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization and Basis of Presentation

The consolidated financial statements include the accounts of Air Group, or the Company, and its primary subsidiaries, Alaska, Horizon and, starting December 14, 2016, Virgin America. The Company conducts substantially all of its operations through these subsidiaries. All significant intercompany balances and transactions have been eliminated. These financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America and their preparation requires the use of management’s estimates. Actual results may differ from these estimates.

Certain reclassifications have been made to prior year financial statements to conform to classifications used in the current year.

Cash and Cash Equivalents

Cash equivalents consist of highly liquid investments with original maturities of three months or less, such as money market funds, commercial paper and certificates of deposit. They are carried at cost, which approximates market value. The Company reduces cash balances when funds are disbursed. Due to the time delay in funds clearing the banks, the Company normally maintains a negative balance in its cash disbursement accounts, which is reported as a current liability. The amount of the negative cash balance was $15 million and $12 million at December 31, 2016 and 2015 and is included in accounts payable, with the change in the balance during the year included in other financing activities in the consolidated statements of cash flows.

The Company's restricted cash balances are primarily used to guarantee various letters of credit, self-insurance programs or other contractual rights. Restricted cash consists of highly liquid securities with original maturities of three months or less. They are carried at cost, which approximates fair value.

Marketable Securities

Investments with original maturities of greater than three months and remaining maturities of less than one year are classified as short-term investments. Investments with maturities beyond one year may be classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. All cash equivalents and short-term investments are classified as available-for-sale and realized gains and losses are recorded using the specific identification method. Changes in market value, excluding other-than-temporary impairments, are reflected in accumulated other comprehensive loss ("AOCL").

Investments are considered to be impaired when a decline in fair value is judged to be other-than-temporary. The Company uses a systematic methodology that considers available quantitative and qualitative evidence in evaluating potential impairment. If the cost of an investment exceeds its fair value, management evaluates, among other factors, general market conditions, credit quality of debt instrument issuers, the duration and extent to which the fair value is less than cost, the Company's intent and ability to hold, or plans to sell, the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded to Other—net in the consolidated statements of operations and a new cost basis in the investment is established.

Receivables

Receivables are due on demand and consist primarily of airline traffic (including credit card) receivables, Mileage Plan™ partner receivables, amounts due from other airlines related to interline agreements, government tax authorities and other miscellaneous amounts due to the Company, and are net of an allowance for doubtful accounts. Management determines the allowance for doubtful accounts based on known troubled accounts and historical experience applied to an aging of accounts.

Inventories and Supplies—net

Expendable aircraft parts, materials and supplies are stated at average cost and are included in inventories and supplies—net. An obsolescence allowance for expendable parts is accrued based on estimated lives of the corresponding fleet type and salvage values. The allowance for expendable inventories was $36 million and $37 million at December 31, 2016 and 2015, respectively. Inventory and supplies—net also includes fuel inventory of $16 million and $14 million at December 31, 2016 and 2015, respectively. Repairable and rotable aircraft parts inventories are included in flight equipment.

Property, Equipment and Depreciation

Property and equipment are recorded at cost and depreciated using the straight-line method over their estimated useful lives less an estimated salvage value, which are as follows:

Aircraft and related flight equipment:
Boeing 737 and Airbus 319/320 aircraft	20-25 years
Bombardier Q400 aircraft	15 years
Buildings	25 - 30 years
Minor building and land improvements	10 years
Capitalized leases and leasehold improvements	Generally shorter of lease term or estimated useful life
Computer hardware and software	3-10 years
Other furniture and equipment	5-10 years

Salvage values used for aircraft are 10% of the fair value, but as aircraft near the end of their useful lives, management updates the salvage value estimates based on current market conditions and expected use of the aircraft. “Related flight equipment” includes rotable and repairable spare inventories, which are depreciated over the associated fleet life unless otherwise noted.

Beginning October 1, 2016, the Company changed its accounting estimate for the expected useful life of the B737 NextGen aircraft, which includes the B737-700, -800, -900, -900ER aircraft and the related parts, from 20 years to 25 years. The change in estimate was precipitated by management's annual accounting policy review, which considered market studies, asset performance and intended use, as well as industry benchmarking. The change in estimate was applied prospectively effective October 1, 2016. The impact of this change in estimate in 2016 is a $17 million decrease to depreciation and amortization expense.

Capitalized interest, based on the Company’s weighted-average borrowing rate, is added to the cost of the related asset, and is depreciated over the estimated useful life of the asset.

Maintenance and repairs are expensed when incurred. Major modifications that extend the life or improve the usefulness of aircraft are capitalized and depreciated over their estimated period of use.

The Company evaluates long-lived assets to be held and used for impairment whenever events or changes in circumstances indicate that the total carrying amount of an asset or asset group may not be recoverable. The Company groups assets for purposes of such reviews at the lowest level, at which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. An impairment loss is considered when estimated future undiscounted cash flows expected to result from the use of the asset or asset group and its eventual disposition are less than its carrying amount. If the asset or asset group is not considered recoverable, a write-down equal to the excess of the carrying amount over the fair value will be recorded.

Goodwill

Goodwill represents the excess of purchase price over the fair value of the related net assets acquired in the Company's acquisition of Virgin America and is not amortized. As of December 31, 2016 the goodwill balance, based on a provisional purchase price allocation, was $1.9 billion. No goodwill impairment test occurred in 2016, as the acquisition was completed late in the fourth quarter. In future periods, the Company will review goodwill for impairment at least annually, or more frequently if events or circumstances indicate than an impairment may exist. The Company will perform this impairment at the reporting unit level. If fair value of the reporting unit exceeds the carrying amount, an impairment charge may be recorded.

Intangible Assets

Intangible assets as of December 31, 2016 were recorded as a result of the acquisition of Virgin America, and consist primarily of indefinite-lived airport slots, finite-lived airport gates and finite-lived customer relationships. Finite-lived intangibles are amortized over their estimated useful lives. Indefinite-lived intangibles are not amortized but are tested at least annually for impairment using a similar methodology to property, equipment and goodwill as described above.

Internally Used Software Costs

The Company capitalizes costs to develop internal-use software that are incurred in the application development stage. Amortization commences when the software is ready for its intended use and the amortization period is the estimated useful life of the software, generally three to five years. Capitalized costs primarily include contract labor and payroll costs of the individuals dedicated to the development of internal-use software.

Deferred Revenue

Deferred revenue results primarily from the sale of Mileage Plan™ miles and Elevate® points to third-parties. It also includes the liability for Elevate® flown points outstanding at the acquisition date that was recorded at its estimated fair value as part of purchase price accounting. The related revenue is recognized when award transportation is provided or over the term of the applicable agreement.

Operating Leases

The Company leases aircraft, airport and terminal facilities, office space and other equipment under operating leases. Some of these lease agreements contain rent escalation clauses or rent holidays. For scheduled rent escalation clauses during the lease terms or for rental payments commencing at a date other than the date of initial occupancy, the Company records minimum rental expenses on a straight-line basis over the terms of the leases in the consolidated statements of operations.

Leased Aircraft Return Costs

Cash payments associated with returning leased aircraft are accrued when it is probable that a cash payment will be made and that amount is reasonably estimable, usually no sooner than after the last scheduled maintenance event prior to lease return. Any accrual is based on the time remaining on the lease, planned aircraft usage and the provisions included in the lease agreement, although the actual amount due to any lessor upon return may not be known with certainty until lease termination.

As leased aircraft are returned, any payments are charged against the established accrual. The accrual is part of other current and long-term liabilities and was not material as of December 31, 2016 and December 31, 2015. The expense is included in Aircraft maintenance in the consolidated statements of operations.

Revenue Recognition

Passenger revenue is recognized when the passenger travels. Tickets sold but not yet used are reported as air traffic liability until travel or date of expiration. Air traffic liability includes approximately $62 million and $42 million related to credits for future travel, as of December 31, 2016 and December 31, 2015, respectively. These credits are recognized into revenue either when the passenger travels or at the date of expiration, which is twelve months from issuance. Commissions to travel agents and related fees are expensed when the related revenue is recognized. Passenger traffic commissions and related fees not yet recognized are recorded as a prepaid expense. Taxes collected from passengers, including transportation excise taxes, airport and security fees and other fees, are recorded on a net basis within passenger revenue in the consolidated statements of operations. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized as revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are based on the Company’s historical data.

Freight and mail revenues are recognized when the related services are provided.

Other—net revenues are primarily related to the Mileage Plan™ and Elevate® programs. They are recognized as described in the “Frequent Flyer Programs” paragraph below. Other—net also includes certain ancillary or non-ticket revenues, such as checked-bag fees, reservations fees, ticket change fees, on-board food and beverage sales, and, to a much lesser extent, commissions from car and hotel vendors and sales of travel insurance. These items are recognized as revenue when the related services are provided.  Airport lounge memberships are recognized as revenue over the membership period.

Frequent Flyer Programs

Alaska operates the Mileage Plan™ frequent flyer program, and Virgin America operates the Elevate® frequent flyer program. Both programs provide travel awards to members based on accumulated mileage or points. For miles or points earned by flying on the Company's airlines and through airline partners, the estimated cost of providing award travel is recognized as a selling expense and accrued as a liability, as miles are earned and accumulated.

Alaska and Virgin America also sell services, including miles or points for transportation, to non-airline partners, such as hotels, car rental agencies and major banks that offer Alaska's and Virgin America's affinity credit cards. The Company defers revenue related to air transportation and certificates for discounted companion travel until the transportation is delivered. The deferred proceeds are recognized as passenger revenue for awards redeemed and flown on the Company's airlines and as Other—net revenue for awards redeemed and flown on other airlines (less the cost paid to the other airlines based on contractual agreements). The elements that represent use of the Alaska and Virgin America brands and access to frequent flyer member lists and advertising are recognized as commission income in the period that those elements are sold and included in Other—net revenue in the consolidated statements of operations.

Frequent flyer program deferred revenue and liabilities included in the consolidated balance sheets (in millions):

	2016		2015
Current Liabilities:
Other accrued liabilities	$	484	$	368
Other Liabilities and Credits:
Deferred revenue	638		427
Other liabilities	21		19
Total	$	1,143	$	814

The amounts recorded in other accrued liabilities relate primarily to deferred revenue expected to be realized within one year, which includes Mileage Plan™ awards that have been issued but not yet flown for $43 million and $37 million at December 31, 2016 and 2015.

Frequent flyer program revenue included in the consolidated statements of operations (in millions):

	2016		2015		2014
Passenger revenues	$	293	$	267	$	246
Other—net revenues	429		329		295
Total frequent flyer program revenues	$	722	$	596	$	541

Other—net revenue includes commission revenues of $329 million, $280 million, and $261 million in 2016, 2015, and 2014.

Selling Expenses

Selling expenses include credit card fees, global distribution systems charges, the estimated cost of frequent flyer travel awards earned through air travel, advertising, promotional costs, commissions and incentives. Advertising production costs are expensed as incurred. Advertising expense was $61 million, $55 million, and $49 million during the years ended December 31, 2016, 2015, and 2014.

Derivative Financial Instruments

The Company's operations are significantly impacted by changes in aircraft fuel prices and interest rates. In an effort to manage exposure to these risks, the Company periodically enters into fuel and interest rate derivative instruments. These derivative instruments are recognized at fair value on the balance sheet and changes in the fair value are recognized in AOCL or in the consolidated statements of operations, depending on the nature of the instrument.

The Company does not hold or issue derivative fuel hedge contracts for trading purposes and does not apply hedge accounting. For cash flow hedges related to interest rate swaps, the effective portion of the derivative represents the change in fair value of the hedge that offsets the change in fair value of the hedged item. To the extent the change in the fair value of the hedge does not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the hedge is immediately recognized in interest expense.

Fair Value Measurements

Accounting standards define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The standards also establish a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company has elected not to use the fair value option provided in the accounting standards for non-financial instruments. Accordingly, those assets and liabilities are carried at amortized cost. For financial instruments, the assets and liabilities are carried at fair value, which is determined based on the market approach or income approach, depending upon the level of inputs used.

Assets and liabilities recognized or disclosed at fair value on a nonrecurring basis include items such as property, plant and equipment, goodwill, intangible assets and certain other assets and liabilities. The Company determines the fair value of these items using Level 3 inputs, as described in Note 2 and Note 5.

Income Taxes

The Company uses the asset and liability approach for accounting for and reporting income taxes. Deferred tax assets and liabilities are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and for operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. A valuation allowance would be established, if necessary, for the amount of any tax benefits that, based on available evidence, are not expected to be realized. As of December 31, 2016, there is a partial valuation allowance against net deferred tax assets. The Company accounts for unrecognized tax benefits in accordance with the applicable accounting standards.

Virgin America has substantial federal and state net operating losses ("NOLs") for income tax purposes. The Company's ability to utilize Virgin America's NOLs could be limited if Virgin America had an “ownership change,” as defined in Section 382 of the Internal Revenue Code and similar state provisions. In general terms, an ownership change can occur whenever there is a collective shift in the ownership of a company by more than 50% by one or more “5% stockholders” within a three-year period. The occurrence of such a change generally limits the amount of NOL carryforwards a company could utilize in a given year to the aggregate fair market value of the company's common stock immediately prior to the ownership change, multiplied by the long-term tax-exempt interest rate in effect for the month of the ownership change. The acquisition constituted an ownership change and the potential for further limitations following the acquisition. See Note 7 to the consolidated financial statements for more discussion of the calculation.

Stock-Based Compensation

Accounting standards require companies to recognize as expense the fair value of stock options and other equity-based compensation issued to employees as of the grant date. These standards apply to all stock awards that the Company grants to employees as well as the Company’s Employee Stock Purchase Plan ("ESPP"), which features a look-back provision and allows employees to purchase stock at a 15% discount. All stock-based compensation expense is recorded in wages and benefits in the consolidated statements of operations.

Earnings Per Share (EPS)

Diluted EPS is calculated by dividing net income by the average common shares outstanding plus additional common shares that would have been outstanding assuming the exercise of in-the-money stock options and restricted stock units, using the treasury-stock method. In 2016, 2015, and 2014, antidilutive stock options excluded from the calculation of EPS were not material.

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers"(Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. This comprehensive new standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. In March 2016, the FASB issued ASU 2016-08, "Revenue from Contracts with Customers (Topic 606), Principal versus Agent Considerations" to clarify the guidance on determining whether the Company is considered the principal or the agent in a revenue transaction where a third party is providing goods or services to a customer. Entities are permitted to use either a full retrospective or cumulative effect transition method, and are required to adopt all parts of the new revenue standard using the same transition method. The new standard is effective for the Company on January 1, 2018. At this time, the Company believes the most significant impact to the financial statements will be to Mileage Plan™ revenues and liabilities. The Company currently uses the incremental cost approach for miles earned through travel. As this approach will be eliminated with the standard, the Company will be required to significantly increase its liability for earned miles through a relative selling price model. The Company continues to evaluate and model the full impact of the standard and currently plans to apply the full retrospective transition method.

In April 2015, the FASB issued ASU 2015-03, "Interest—Imputation of Interest" (Subtopic 835-30), which requires debt issuance costs related to a debt liability be presented as a direct deduction from the carrying value of the debt liability. The amendment was adopted as of January 1, 2016. Prior period debt balances have been adjusted to reflect the adoption of the ASU. The adoption of the ASU had no impact on the statements of operations or retained earnings.

In February 2016, the FASB issued ASU 2016-02, "Leases" (Topic 842), which requires lessees to recognize assets and liabilities for leases currently classified as operating leases. Under the new standard a lessee will recognize a liability on the balance sheet representing the lease payments owed, and a right-of-use-asset representing its right to use the underlying asset for the lease term. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election not to recognize lease assets and lease liabilities. The new standard is effective for the Company on January 1, 2019. Early adoption of the standard is permitted. At this time, the Company believes the most significant impact to the financial statements will relate to the recording of a right of use asset associated with leased aircraft. Other leases, including airports and real estate, equipment, software and other miscellaneous leases continue to be assessed for impact as it relates to ASU 2016-02. The Company has not yet determined whether it will early adopt the standard.

In March 2016, the FASB issued ASU 2016-09, "Compensation—Stock Compensation" (Topic 718), which simplifies several aspects of accounting for employee share-based payment awards, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The ASU is effective for the Company beginning January 1, 2017. The adoption of the standard will not have a material impact on the Company's statements of operations or financial position.

In January 2017, the FASB issued ASU 2017-04, "Intangibles—Goodwill and Other" (Topic 350), which eliminates step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The ASU is effective for the Company beginning January 1, 2019. Early adoption of the standard is permitted. Beginning in fiscal 2017 the Company will be required to perform an impairment test for goodwill arising from its acquisition of Virgin America and plans to adopt the standard in 2017.

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ACQUISITION OF VIRGIN AMERICA, INC. (Notes)

12 Months Ended

Dec. 31, 2016

Business Combinations [Abstract]

ACQUISITION OF VIRGIN AMERICA, INC.

ACQUISITION OF VIRGIN AMERICA INC.

Virgin America

On December 14, 2016, the Company acquired 100% of the outstanding common shares and voting interest of Virgin America. Virgin America offers scheduled air transport throughout the United States and Mexico primarily from its focus cities of Los Angeles, San Francisco and, to a lesser extent, Dallas Love Field, to other major business and leisure destinations in North America. The Company believes the acquisition of Virgin America will provide broader national reach and position the Company to better serve people living on the West Coast. The combined airline will provide 1,200 daily departures to its guests, leveraging Alaska's strength in the Pacific Northwest with Virgin America's strength in California. The Company believes that combining loyalty programs and networks will provide greater benefits for its guests and expand its international partner portfolio, giving guests an even more expansive global reach.

The results of Virgin America have been included in the consolidated financial statements since the acquisition date. For the year ended December 31, 2016, revenue and net income from Virgin America recognized in the Company's consolidated results of operations were $99 million and $15 million.

Fair value of consideration transferred

The fair value of consideration transferred on the closing date includes the value of the cash consideration and accelerated and vested equity awards attributable to pre-acquisition service. The purchase price is as follows (in millions, except per-share stock price):

	December 14, 2016
Number of shares of Virgin America common stock issued and outstanding	44.645
Multiplied by cash consideration for each share of common stock per the merger agreement	$	57.00
Cash consideration paid for common stock issued and outstanding	2,545
Accelerated and vested equity awards attributable to pre-acquisition service	51
Total Purchase Price	$	2,596

Fair values of the assets acquired and the liabilities assumed

The transaction has been accounted for as a business combination using the acquisition method of accounting, which requires, among other things, that assets acquired and liabilities assumed be recognized on the balance sheet at their fair values as of the acquisition date. The fair values of the assets acquired and liabilities assumed were determined using the market, income and cost approaches. The purchase price allocation was prepared on a preliminary basis and is subject to further adjustments as additional information becomes available concerning the fair value of the assets acquired and liabilities assumed. The Company expects to continue obtaining information to assist it with determining the fair values of the net assets acquired during the measurement period. Any adjustments to the purchase price allocation will be made as soon as practicable but no later than one year from the acquisition date.

Provisional fair value of the assets acquired and the liabilities assumed as of the acquisition date, December 14, 2016, (in millions) are as follows:

	December 14, 2016
Cash and cash equivalents	$	645
Receivables	44
Prepaid expenses and other current assets	16
Property and equipment	560
Intangible assets	143
Goodwill	1,934
Other assets	84
Total assets	3,426
Accounts payable	22
Accrued wages, vacation and payroll taxes	51
Air traffic liabilities	172
Other accrued liabilities	196
Current portion of long-term debt	125
Long-term debt, net of current portion	360
Deferred income taxes	(304		)
Deferred revenue	126
Other liabilities	82
Total liabilities	830
Total purchase price	$	2,596

Intangible Assets

Of the $143 million of acquired intangible assets, $89 million was provisionally assigned to airport slots. Airport slots are rights to take-off or land at a slot-controlled airport during a specific time period and are a means by which the FAA manages airspace/airport congestion. The Company acquired slots at three such airports—John F. Kennedy International, LaGuardia and Ronald Reagan Washington National. These slots either have no expiration dates or are expected to be renewed indefinitely in line with the FAA's past practice. They require no maintenance and do not have an established residual value. As the demands for air travel at these airports have remained very strong, the Company expects to use these slots in perpetuity and has determined these airport slots to be indefinite-lived intangible assets. They will not be amortized but rather tested for impairment annually, or more frequently when events and circumstances indicate that impairment may exist.

Of the remaining $54 million, $40 million was provisionally assigned to customer relationships to be amortized on a straight-line basis over the estimated economic life of eight years and $14 million to airport gates to be amortized on straight-line basis over the remaining lease term of twelve years. As noted above, the fair value of the acquired identifiable intangible assets is provisional pending results of their final valuation.

The Company considered examples of intangible assets that the FASB believes meet the criteria for recognition apart from goodwill, as well as any other intangible assets common to the airline industry, and did not identify any other such intangible assets acquired in the transaction.

Goodwill

Goodwill of $1.9 billion represents the excess of the purchase price over the fair value of the underlying net assets acquired and largely results from expected future synergies from combining operations as well as an assembled workforce, which does not qualify for separate recognition. Goodwill is not amortized to earnings, but instead is reviewed for impairment at least annually, absent any indicators of impairment.

Repayment of related-party debt and merger-related costs

Soon after the acquisition, the Company repaid $55 million of related-party debt held by Virgin America as of December 14, 2016 to comply with the change-of-control provision triggered by the transaction.

As of December 31, 2016, the Company has incurred pretax merger-related costs of $117 million. Costs classified as merger-related are directly attributable to merger activities. These costs are classified as "Special items—merger-related costs and other" within the Statement of Operations. Refer to Note 11 for further information on special items. The Company expects to continue to incur merger-related costs in the future as the integration continues.

Pro forma impact of the acquisition

The unaudited pro forma financial information presented below represents a summary of the consolidated results of operations for the Company and Virgin America as if the acquisition of Virgin America had been consummated as of January 1, 2015. The pro forma results do not include any anticipated synergies, or other expected benefits of the acquisition. Accordingly, the unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated as of January 1, 2015.

(in millions, except per share amounts)	Years Ended December 31,
	2016		2015
Revenue	$	7,511	$	7,111
Net Income	1,008		914

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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

12 Months Ended

Dec. 31, 2016

Cash, Cash Equivalents, and Short-term Investments [Abstract]

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

Components for cash, cash equivalents and marketable securities (in millions):

December 31, 2016	Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Cash	$	283	$	—	$	—		$	283
Cash equivalents	45		—		—			45
Cash and cash equivalents	328		—		—			328
U.S. government and agency securities	290		—		(3		)	287
Foreign government bonds	36		—		—			36
Asset-backed securities	138		—		—			138
Mortgage-backed securities	89		—		—			89
Corporate notes and bonds	693		2		(4		)	691
Municipal securities	11		—		—			11
Marketable securities	1,257		2		(7		)	1,252
Total	$	1,585	$	2	$	(7	)	$	1,580

December 31, 2015	Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Cash	$	4	$	—	$	—		$	4
Cash equivalents	69		—		—			69
Cash and cash equivalents	73		—		—			73
U.S. government and agency securities	254		—		(1		)	253
Foreign government bonds	31		—		—			31
Asset-backed securities	130		—		—			130
Mortgage-backed securities	117		—		(1		)	116
Corporate notes and bonds	711		1		(4		)	708
Municipal securities	17		—		—			17
Marketable securities	1,260		1		(6		)	1,255
Total	$	1,333	$	1	$	(6	)	$	1,328

Unrealized losses from marketable securities are primarily attributable to changes in interest rates. Management does not believe any remaining unrealized losses represent other-than-temporary impairments based on the Company's evaluation of available evidence as of December 31, 2016.

Activity for marketable securities (in millions):  

	2016			2015			2014
Proceeds from sales and maturities	$	962		$	1,175		$	1,092
Gross realized gains	3			2			4
Gross realized losses	(1		)	(3		)	(2		)

Maturities for marketable securities (in millions):

December 31, 2016	Cost Basis		Fair Value
Due in one year or less	$	182	$	182
Due after one year through five years	1,070		1,065
Due after five years through 10 years	5		5
Due after 10 years	—		—
Total	$	1,257	$	1,252

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DERIVATIVE INSTRUMENTS

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT

Fuel Hedge Contracts

The Company’s operations are inherently dependent upon the price and availability of aircraft fuel. To manage economic risks associated with fluctuations in aircraft fuel prices, the Company periodically enters into call options for crude oil.

As of December 31, 2016, the Company had fuel hedge contracts outstanding covering 394 million gallons of crude oil that will be settled from January 2017 to June 2018.

Interest Rate Swap Agreements

The Company is exposed to market risk from adverse changes in variable interest rates on long term debt and certain aircraft lease agreements. To manage this risk, the Company periodically enters into interest rate swap agreements. As of December 31, 2016, the Company has outstanding interest rate swap agreements with a third party designed to hedge the volatility of the underlying variable interest rates on lease agreements for six B737-800 aircraft, as well as two interest rate swap agreements with third parties designed to hedge the volatility of the underlying variable interest rates on $295 million of the debt obtained in 2016. All of the interest rate swap agreements stipulate that the Company pay a fixed interest rate and receive a floating interest rate over the term of the underlying contracts. The interest rate swap agreements expire from February 2020 through March 2021 to coincide with the lease termination dates and October 2022 through September 2026 to coincide with the debt maturity dates. All significant terms of the swap agreements match the terms of the underlying hedged items, and have been designated as qualifying hedging instruments, which are accounted for as cash flow hedges.

As qualifying cash flow hedges, the interest rate swaps are recognized at fair value on the balance sheet, and changes in the fair value are recognized in accumulated other comprehensive income (loss). The effective portion of the derivative represents the change in fair value of the hedge that offsets the change in fair value of the hedged item. To the extent the change in fair value of the hedge does not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the hedge is recognized in interest expense, if material.

Fair Values of Derivative Instruments

Fair values of derivative instruments on the consolidated balance sheet (in millions):

	2016			2015
Derivative Instruments Not Designated as Hedges
Fuel hedge contracts
Prepaid expenses and other current assets	$	17		$	2
Other assets	3			2
Derivative Instruments Designated as Hedges
Interest rate swaps
Other accrued liabilities	(5		)	(5		)
Other liabilities	—			(13		)
Losses in accumulated other comprehensive loss (AOCL)	(5		)	(18		)

The net cash paid for new fuel hedge positions and settlements was $19 million, $17 million and $9 million during 2016, 2015, and 2014.

Pretax effect of derivative instruments on earnings and AOCL (in millions):

	2016			2015			2014
Derivative Instruments Not Designated as Hedges
Fuel hedge contracts
Gains (losses) recognized in Aircraft fuel	$	(3	)	$	(19	)	$	(18	)
Derivative Instruments Designated as Hedges
Interest rate swaps
Gains (losses) recognized in Aircraft rent	(6		)	(6		)	(6		)
Gains (losses) recognized in other comprehensive income (OCI)	8			(5		)	(8		)

The amounts shown as recognized in aircraft rent for cash flow hedges (interest rate swaps) represent the realized losses transferred out of AOCL to aircraft rent. No gains or losses related to interest rate swaps on variable rate debt have been recognized in interest expense during 2016. The amounts shown as recognized in OCI are prior to the losses recognized in aircraft rent during the period. The Company expects $4 million to be reclassified from OCI to aircraft rent and $1 million to interest expense within the next twelve months.

Credit Risk and Collateral

The Company is exposed to credit losses in the event of non-performance by counterparties to these derivative instruments. To mitigate exposure, the Company periodically reviews the risk of counterparty nonperformance by monitoring the absolute exposure levels and credit ratings. The Company maintains security agreements with a number of its counterparties which may require the Company to post collateral if the fair value of the selected derivative instruments fall below specified thresholds. The posted collateral does not offset the fair value of the derivative instruments and is included in "Prepaid expenses and other current assets" on the consolidated balance sheet.

The amount posted as collateral for these contracts is not material to the consolidated balance sheets as of December 31, 2016 and 2015.

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FAIR VALUE MEASUREMENTS

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Fair Value of Financial Instruments on a Recurring Basis

Fair values of financial instruments on the consolidated balance sheet (in millions):

December 31, 2016	Level 1		Level 2			Total
Assets
Marketable securities
U.S. government and agency securities	$	287	$	—		$	287
Foreign government bonds	—		36			36
Asset-backed securities	—		138			138
Mortgage-backed securities	—		89			89
Corporate notes and bonds	—		691			691
Municipal securities	—		11			11
Derivative instruments
Fuel hedge contracts—call options	—		20			20
Liabilities
Derivative instruments
Interest rate swap agreements	—		(5		)	(5		)

December 31, 2015	Level 1		Level 2			Total
Assets
Marketable securities
U.S. government and agency securities	$	253	$	—		$	253
Foreign government bonds	—		31			31
Asset-backed securities	—		130			130
Mortgage-backed securities	—		116			116
Corporate notes and bonds	—		708			708
Municipal securities	—		17			17
Derivative instruments
Fuel hedge contracts—call options	—		4			4
Liabilities
Derivative instruments
Interest rate swap agreements	—		(18		)	(18		)

The Company uses the market and income approach to determine the fair value of marketable securities. U.S. government securities are Level 1 as the fair value is based on quoted prices in active markets. Foreign government bonds, asset-backed securities, mortgage-backed securities, corporate notes and bonds, and municipal securities are Level 2 as the fair value is based on standard valuation models that are calculated based on observable inputs such as quoted interest rates, yield curves, credit ratings of the security and other observable market information.

The Company uses the market approach and the income approach to determine the fair value of derivative instruments. Fuel hedge contracts that are not traded on a public exchange are Level 2 as the fair value is primarily based on inputs which are readily available in active markets or can be derived from information available in active markets. The fair value for call options is determined utilizing an option pricing model based on inputs that are readily available in active markets, or can be derived from information available in active markets. In addition, the fair value considers the exposure to credit losses in the event of non-performance by counterparties. Interest rate swap agreements are Level 2 as the fair value of these contracts is determined based on the difference between the fixed interest rate in the agreements and the observable LIBOR-based interest forward rates at period end, multiplied by the total notional value.

The Company has no other financial assets that are measured at fair value on a nonrecurring basis at December 31, 2016.

Fair Value of Other Financial Instruments

The Company used the following methods and assumptions to determine the fair value of financial instruments that are not recognized at fair value as described below.

Cash and Cash Equivalents: Carried at amortized costs which approximate fair value.

Debt: The carrying amounts of the Company's variable-rate debt approximate fair values. For fixed-rate debt, the Company uses the income approach to determine the estimated fair value, by discounting cash flows using borrowing rates for comparable debt over the weighted life of the outstanding debt. The estimated fair value of the fixed-rate debt is Level 3 as certain inputs used are unobservable.

Fixed-rate debt that is not carried at fair value on the consolidated balance sheet and the estimated fair value of long-term fixed-rate debt (in millions):

	2016		2015
Carrying amount	$	1,179	$	520
Fair value	1,199		557

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LONG-TERM DEBT

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

LONG-TERM DEBT

LONG-TERM DEBT

Long-term debt obligations (in millions):

	2016			2015
Fixed-rate notes payable due through 2028	$	1,179		$	520
Variable-rate notes payable due through 2028	1,803			166
Less debt issuance costs	(18		)	(3		)
Long-term debt	2,964			683
Less current portion	319			114
	$	2,645		$	569
Weighted-average fixed-interest rate	4.4		%	5.7		%
Weighted-average variable-interest rate	2.4		%	1.8		%

During 2016, the Company's total debt increased $2.3 billion, primarily due to the addition of $2.0 billion of secured debt financing from multiple lenders to fund the acquisition of Virgin America. Approximately $1.6 billion of the loans are secured by a total of 56 aircraft, including 37 B737-900ER aircraft and 19 B737-800 aircraft. An additional $400 million is secured by Air Group's interest in certain aircraft purchase agreements. The remainder is due to assumed debt from Virgin America. During 2016, the Company made debt payments of $249 million, including $95 million of debt extinguishment that arose from the Virgin America acquisition, and $12 million related to prepayments of existing loans. The Company's variable-rate notes payable bear interest at a floating rate per annum equal to a margin plus the three or six-month LIBOR in effect at the commencement of each semi-annual or three-month period, as applicable. As of December 31, 2016, none of the Company's borrowings were restricted by financial covenants.

Long-term debt principal payments for the next five years and thereafter (in millions):

	Total
2017	$	321
2018	351
2019	424
2020	451
2021	424
Thereafter	1,007
Total principal payments	$	2,978

Bank Line of Credit

The Company has two$100 million credit facilities and one$52 million credit facility. All three facilities have variable interest rates based on LIBOR plus a specified margin. One of the $100 million facilities, which expires in September 2017, is secured by aircraft. The other $100 million facility, which expires in March 2017, is secured by certain accounts receivable, spare engines, spare parts and ground service equipment. The $52 million facility expires in October 2017 with a mechanism for annual renewal and is secured by two aircraft. The Company has secured letters of credit against the $52 million facility, but has no plans to borrow using either of the two remaining facilities. All three credit facilities have a requirement to maintain a minimum unrestricted cash and marketable securities balance of $500 million. The Company was in compliance with this covenant at December 31, 2016.

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INCOME TAXES

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

Deferred Income Taxes

Deferred income taxes reflect the impact of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and such amounts for tax purposes. Primarily due to differences in depreciation rates for federal income tax purposes and for financial reporting purposes, the Company has generated a net deferred tax liability.

Deferred tax (assets) and liabilities comprise the following (in millions):

	2016			2015
Excess of tax over book depreciation	$	1,282		$	1,110
Intangibles	39			—
Other—net	26			23
Gross deferred tax liabilities	1,347			1,133
Mileage Plan™	(310		)	(208		)
Inventory obsolescence	(23		)	(22		)
Deferred gains	(8		)	(8		)
Employee benefits	(196		)	(167		)
Fuel hedge contracts	—			(5		)
Acquired net operating losses	(289		)	—
Other—net	(62		)	(41		)
Gross deferred tax assets	(888		)	(451		)
Valuation allowance	4			—
Net deferred tax (assets) liabilities	$	463		$	682

Changes in net deferred tax liabilities resulted from 2016 activity and the acquisition of Virgin America.

At December 31, 2016, as a result of the acquisition of Virgin America, discussed in Note 2, Virgin America had federal NOLs of approximately $773 million that expire beginning in 2028 and continuing through 2036, and state NOLs of approximately $344 million that expire beginning in 2027 and continuing through 2035.

Virgin America has experienced multiple “ownership changes” as defined in Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), the most recent being its acquisition by the Company. Section 382 of the Code imposes an annual limitation on the amount of pre-ownership change NOLs of the corporation that experiences an ownership change. The limitation imposed by Section 382 of the Code for any post-ownership change year generally would be determined by multiplying the value of such corporation’s stock immediately before the ownership change by the applicable long-term tax-exempt rate. Any unused annual limitation may, subject to certain limits, be carried over to later years, and the limitation may, under certain circumstances, be increased by built-in gains or reduced by built-in losses in the assets held by such corporation at the time of the ownership change. The combined company’s use of NOLs generated after the date of an ownership change would not be limited unless the combined company were to experience a subsequent ownership change.

The combined company’s ability to use the NOLs will also depend on the amount of taxable income generated in future periods. The NOLs may expire before the combined company can generate sufficient taxable income to utilize the NOLs.

Valuation allowances are provided to reduce the related deferred income tax assets to an amount which will, more likely than not, be realized. The Company has determined it is more likely than not that a portion of the state NOL carryforward will not be realized and, therefore, has provided a valuation allowance of $4 million for that portion. The Company has likewise concluded that it is more likely than not that all of its federal and the remaining state deferred income tax assets will be realized and thus no additional valuation allowance has been recorded. The Company reassesses the need for a valuation allowance each reporting period.

Components of Income Tax Expense

The components of income tax expense were as follows (in millions): 

	2016		2015			2014
Current income tax expense:
Federal	$	392	$	397		$	229
State	48		30			27
Total current income tax expense	440		427			256
Deferred income tax expense:
Federal	77		60			103
State	14		(23		)	11
Total deferred income tax expense	91		37			114
Income tax expense	$	531	$	464		$	370

Income Tax Rate Reconciliation

Income tax expense reconciles to the amount computed by applying the U.S. federal rate of 35% to income before income tax and accounting changes as follows (in millions):

	2016			2015			2014
Income before income tax	$	1,345		$	1,312		$	975
Expected tax expense	471			459			341
Nondeductible expenses	20			4			4
State income taxes	28			19			25
State income sourcing	13			(15		)	—
Other—net	(1		)	(3		)	—
Actual tax expense	$	531		$	464		$	370
Effective tax rate	39.5		%	35.4		%	37.9		%

In 2016, the Company incurred $39 million of acquisition-related costs that are not deductible under U.S. federal tax law. These expenses are included in Special items—merger-related costs and other on the Company’s consolidated statement of operations for the year ended December 31, 2016 and are reflected as a permanent unfavorable adjustment for the year ended December 31, 2016, in the table above.

In the fourth quarter of 2015, the Company filed amended state tax returns for the years 2010 through 2013 to change the Company’s position on income sourcing in various states. These positions were also taken on 2014 and future filings, unless guidance or rules changed. In 2016, adjustments were made to the Company's position on income sourcing in various states due to updated guidance from state taxing authorities. The impact of this guidance is reflected as an unfavorable adjustment of approximately $17 million for the year ended December 31, 2016.

Uncertain Tax Positions

The Company has identified its federal tax return and its state tax returns in Alaska, Oregon and California as “major” tax jurisdictions.  A summary of the Company's jurisdictions and the periods that are subject to examination are as follows:

Jurisdiction	Period
Federal	2006 to 2015 (a)(b)
Alaska	2012 to 2015
California	2006 to 2015(a)
Oregon	2003 to 2015(a)

(a) The 2003, 2004, 2008-2010 and 2011 Oregon tax returns are subject to examination only to the extent of net operating loss carryforwards from those years that were utilized in 2010 and later years. The 2006-2012 Federal and California Virgin America tax returns are subject to examination only to the extent of net operating loss carryforwards from those years that were utilized in 2012 and later years.

(b) Income tax years 2012 and 2013 are currently under exam by the Internal Revenue Service.

Changes in the liability for unrecognized tax benefits during 2016, 2015 and 2014 are as follows (in millions):

	2016		2015		2014
Balance at January 1,	$	22	$	3	$	2
Additions based on tax positions and settlements related to the current year	3		19		1
Additions from acquisitions	8		—		—
Balance at December 31,	$	33	$	22	$	3

At December 31, 2016, the total amount of unrecognized tax benefits is recorded as a liability and some have reduced the NOL carryover from the Virgin America acquisition. The Company added $3 million of reserves for uncertain tax positions in 2016, primarily due to changes in income sourcing for state income taxes and added $8 million related to the acquisition of Virgin America. These uncertain tax positions could change as a result of the Company's ongoing audits, settlement of issues, new audits and status of other taxpayer court cases. The Company cannot predict the timing of these actions. Due to the positions being taken in various jurisdictions, the amounts currently accrued are the Company's best estimate as of December 31, 2016.

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EMPLOYEE BENEFIT PLANS

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

Four defined-benefit and five defined-contribution retirement plans cover various employee groups of Alaska and Horizon. Following the acquisition of Virgin America on December 14, 2016, there is a sixth defined contribution plan which covers the Virgin America employee groups. The defined-benefit plans provide benefits based on an employee’s term of service and average compensation for a specified period of time before retirement. The qualified defined-benefit pension plans are closed to new entrants.

Accounting standards require recognition of the overfunded or underfunded status of an entity’s defined-benefit pension and other postretirement plan as an asset or liability in the consolidated financial statements and requires recognition of the funded status in AOCL.

Qualified Defined-Benefit Pension Plans

The Company’s pension plans are funded as required by the Employee Retirement Income Security Act of 1974. The defined-benefit plan assets consist primarily of marketable equity and fixed-income securities. The Company uses a December 31 measurement date for these plans.

Weighted average assumptions used to determine benefit obligations:

	2016	2015
Discount rates (a)	4.29% to 4.50%	4.55% to 4.69%
Rate of compensation increases(a)	2.12% to 2.59%	2.06% to 2.65%

^(a)  Varies by plan and related work group.

Weighted average assumptions used to determine net periodic benefit cost:

	2016	2015	2014
Discount rates(a)	4.55% to 4.69%	4.20%	4.85%
Expected return on plan assets(a)	6.00% to 6.50%	6.50%	6.75%
Rate of compensation increases(a)	2.06% to 2.65%	2.85% to 3.91%	2.90% to 3.93%

^(a)  Varies by plan and related work group.

The discount rates are determined using current rates earned on high-quality, long-term bonds with maturities that correspond with the estimated cash distributions from the pension plans. At December 31, 2016, the Company selected discount rates for each of the plans using a pool of higher-yielding bonds estimated to be more reflective of settlement rates, as management has taken steps to ultimately terminate or settle plans that are frozen and move toward freezing benefits in active plans in the future. In determining the expected return on plan assets, the Company assesses the current level of expected returns on risk-free investments (primarily government bonds), the historical level of the risk premium associated with the other asset classes in which the portfolio is invested and the expectations for future returns of each asset class. The expected return for each asset class is then weighted based on the target asset allocation to develop the expected long-term rate of return on assets assumption for the portfolio.

Plan assets are invested in common commingled trust funds invested in equity and fixed income securities and in certain real estate assets. The target and actual asset allocation of the funds in the qualified defined-benefit plans, by asset category, are as follows: 

	Target	2016		2015
Asset category:
Domestic equity securities	22% - 33%	30	%	28	%
Non-U.S. equity securities	9% - 16%	12	%	12	%
Fixed income securities	48% - 67%	53	%	55	%
Real estate	0% - 8%	5	%	5	%
Plan assets		100	%	100	%

The Company’s investment policy focuses on achieving maximum returns at a reasonable risk for pension assets over a full market cycle. In 2015, the Company separated the management of plan assets for the defined-benefit plan that covers the Company's non-union, management participants. This plan has been closed to new participants since 2003 and benefits were frozen effective January 1, 2014. These assets have a higher allocation to fixed income securities than the other plans. The Company uses a fund manager and invests in various asset classes to diversify risk.

The Company determines the strategic allocation between equities, fixed income and real estate based on current funded status and other characteristics of the plans. As the funded status improves, the Company increases the fixed income allocation of the portfolio and decreases the equity allocation. Actual asset allocations are reviewed regularly and periodically rebalanced as appropriate.

As of December 31, 2016, all assets other than real estate were invested in common commingled trust funds.  The Company uses the net asset values of these funds to determine fair value as allowed using the practical expediency method outlined in the accounting standards. Fair value estimates for real estate are calculated using the present value of expected future cash flows based on independent appraisals, local market conditions and current and projected operating performance.

Certain investments were previously misclassified in the fair value hierarchy disclosure in 2015 based on the Company's interpretation of relevant guidance.  Upon further evaluation, investments in common commingled trusts were determined to have a readily determinable fair value and are now disclosed within the fair value hierarchy. Additionally, investments in the real estate limited partnership are measured at net asset value per share as a practical expedient and excluded from the fair value hierarchy.  These changes in disclosure do not have a material impact on the financial statements and are consistent with presentation of amounts as of December 31, 2016 as shown below.

Plan asset by fund category (in millions):

	2016		2015		Fair Value Hierarchy
Fund type:
U.S. equity market fund	$	545	$	491	1
Non-U.S. equity fund	218		208		1
Credit bond index fund	992		953		1
Plan assets in common commingled trusts	$	1,755	$	1,652
Real estate	91		85		(a)
Total plan assets	$	1,846	$	1,737

(a) In accordance with Subtopic 820-10, certain investments that are measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.

The following table sets forth the status of the qualified defined-benefit pension plans (in millions):

	2016			2015
Projected benefit obligation ("PBO")
Beginning of year	$	1,898		$	2,050
Service cost	37			41
Interest cost	73			84
Plan settlement	—			(62		)
Actuarial (gain) loss	104			(140		)
Benefits paid	(69		)	(75		)
End of year	$	2,043		$	1,898
Plan assets at fair value
Beginning of year	$	1,737		$	1,917
Actual return on plan assets	178			(43		)
Employer contributions	—			—
Plan settlement	—			(62		)
Benefits paid	(69		)	(75		)
End of year	$	1,846		$	1,737
Funded status (unfunded)	$	(197	)	$	(161	)
Percent funded	90		%	92		%

The accumulated benefit obligation for the combined qualified defined-benefit pension was $1.9 billion and $1.8 billion at December 31, 2016 and 2015.

The amounts recognized in the consolidated balance sheets (in millions): 

	2016			2015
Accrued benefit liability-long term	$	225		$	173
Plan assets-long term (within Other noncurrent assets)	(28		)	(12		)
Total liability recognized	$	197		$	161

The amounts not yet reflected in net periodic benefit cost and included in AOCL (in millions):

	2016			2015
Prior service credit	$	(10	)	$	(11	)
Net loss	509			499
Amount recognized in AOCL (pretax)	$	499		$	488

The expected amortization of prior service credit and net loss from AOCL in 2017 is $1 million and $26 million, respectively, for the qualified defined-benefit pension plans.

Net pension expense for the qualified defined-benefit plans included the following components (in millions): 

	2016			2015			2014
Service cost	$	37		$	41		$	33
Interest cost	73			84			81
Expected return on assets	(108		)	(122		)	(117		)
Amortization of prior service credit	(1		)	(1		)	(1		)
Recognized actuarial loss	25			26			13
Settlement expense (special item)	—			14			—
Net pension expense	$	26		$	42		$	9

In 2015, the Company recognized a settlement charge of $14 million related to lump sum settlements offered to terminated, vested plan participants. The result was a reduction in the projected benefit obligation of $62 million. The settlement charge reflects the remaining unamortized actuarial loss in AOCL associated with the settled obligation.

There are no current statutory funding requirements for the Company’s plans in 2017, nor does the Company expect to contribute to the qualified defined-benefit pension plans during 2017.

Future benefits expected to be paid over the next ten years under the qualified defined-benefit pension plans from the assets of those plans (in millions): 

	Total
2017	$	85
2018	93
2019	96
2020	109
2021	109
2022– 2026	652

Nonqualified Defined-Benefit Pension Plan

Alaska also maintains an unfunded, noncontributory defined-benefit plan for certain elected officers. This plan uses a December 31 measurement date. The assumptions used to determine benefit obligations and the net period benefit cost for the nonqualified defined-benefit pension plan are similar to those used to calculate the qualified defined-benefit pension plan. The plan's unfunded status, PBO and accumulated benefit obligation are immaterial. The net pension expense in prior year and expected future expense is also immaterial.

Postretirement Medical Benefits

The Company allows certain retirees to continue their medical, dental and vision benefits by paying all or a portion of the active employee plan premium until eligible for Medicare, currently age 65. This results in a subsidy to retirees, because the premiums received by the Company are less than the actual cost of the retirees’ claims. The accumulated postretirement benefit obligation for this subsidy is unfunded. The accumulated postretirement benefit obligation was $76 million and $64 million at December 31, 2016 and 2015 respectively. The net periodic benefit cost was not material in 2016 or 2015.

During 2014, the Company made changes to the postretirement medical benefits for non-union personnel and certain labor groups to sunset the postretirement medical benefits effective in 2015. As a result of these changes, the Company recognized a partial curtailment gain of $25 million in 2014. The curtailment gain included $5 million associated with an embedded sick leave subsidy. This subsidy was used to establish a new compensated absence liability. The net impact of the curtailment gain of $20 million is included in special items in the income statement.

Defined-Contribution Plans

The defined-contribution plans are deferred compensation plans under section 401(k) of the Internal Revenue Code. All of these plans require Company contributions. Total expense for the defined-contribution plans was $67 million, $60 million and $54 million in 2016, 2015, and 2014.  

The Company also has a noncontributory, unfunded defined-contribution plan for certain elected officers of the Company who are ineligible for the nonqualified defined-benefit pension plan. Amounts recorded as liabilities under the plan are not material to the consolidated balance sheets at December 31, 2016 and 2015.

Pilot Long-term Disability Benefits

Alaska maintains a long-term disability plan for its pilots. The long-term disability plan does not have a service requirement. Therefore, the liability is calculated based on estimated future benefit payments associated with pilots that were assumed to be disabled on a long-term basis as of December 31, 2016 and does not include any assumptions for future disability. The liability includes the discounted expected future benefit payments and medical costs.  The total liability was $25 million and $19 million, which was recorded net of a prefunded trust account of $3 million and $2 million, and included in long-term other liabilities on the consolidated balance sheets as of December 31, 2016 and December 31, 2015, respectively.

Employee Incentive-Pay Plans

The Company has employee incentive plans that pay employees based on certain financial and operational metrics. These metrics are set and approved annually by the Compensation Committee of the Board of Directors. The aggregate expense under these plans in 2016, 2015 and 2014 was $127 million, $120 million and $116 million. The Air Group plans are summarized below.

• Performance-Based Pay ("PBP") is a program that rewards the majority of Air Group employees.  The program is based on four separate metrics related to Air Group profitability, safety, achievement of unit-cost goals and employee engagement as measured by customer satisfaction.

• The Operational Performance Rewards Program entitles the majority of Air Group employees to quarterly payouts of up to $300 per person if certain operational and customer service objectives are met.

Virgin America operated three similar plans, including a traditional profit sharing plan, through 2016. The impact of these plans was immaterial for the period from the date of acquisition through December 31, 2016. Starting January 1, 2017 all employees will participate in the Air Group plans described above.

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COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Future minimum payments for commitments as of December 31, 2016 (in millions):

	Aircraft Leases		Facility Leases		Aircraft Purchase Commitments		Capacity Purchase Agreements		Aircraft Maintenance Deposits		Aircraft Maintenance and Parts Management
2017	$	302	$	123	$	926	$	76	$	59	$	30
2018	316		73		848		80		61		32
2019	305		63		694		85		65		35
2020	279		57		354		90		68		37
2021	242		50		277		94		63		40
Thereafter	953		171		361		676		90		—
Total	$	2,397	$	537	$	3,460	$	1,101	$	406	$	174

Lease Commitments

Aircraft lease commitments include future obligations for all of the Company's operating airlines—Alaska, Virgin America and Horizon, as well as aircraft leases operated by third-parties. At December 31, 2016, the Company had lease contracts for 17 B737 aircraft, 15 Q400 aircraft and 53 Airbus aircraft. Additionally, as of December 31, 2016 the Company has 15 leased E175s with SkyWest. The Company has 10 scheduled lease deliveries of A321neo aircraft from 2017 through 2018 and five scheduled lease deliveries of E175s in 2017 to be operated by SkyWest. All lease contracts have remaining noncancelable lease terms ranging from 2017 to 2030. The Company has the option to increase capacity flown by SkyWest with eight additional E175 aircraft with deliveries in 2019. Options to lease are not reflected in the commitments table above.

Facility lease commitments primarily include airport and terminal facilities and building leases. Total rent expense for aircraft and facility leases was $315 million, $295 million and $288 million, in 2016, 2015 and 2014.

Aircraft Purchase Commitments

Aircraft purchase commitments include non-cancelable contractual commitments for aircrafts and engines. As of December 31, 2016, the Company is committed to purchasing 54 B737 aircraft (22 B737 NextGen aircraft and 32 B737 MAX aircraft, with deliveries in 2017 through 2023) and 33 E175 aircraft with deliveries in 2017 through 2019. In addition, the Company has options to purchase 41 B737 aircraft, 30 A320neo aircraft and 30 E175 aircraft. Option payments are not reflected in the table above.

Capacity Purchase Agreements ("CPAs")

At December 31, 2016, Alaska had CPAs with three carriers, including the Company's wholly-owned subsidiary, Horizon. Horizon sells 100% of its capacity under a CPA with Alaska. In addition, Alaska has CPAs with SkyWest Airlines, Inc ("SkyWest") to fly certain routes in the Lower 48 and Canada and with Peninsula Airways, Inc ("PenAir") to fly certain routes in the state of Alaska. Under these agreements, Alaska pays the carriers an amount which is based on a determination of their cost of operating those flights and other factors intended to approximate market rates for those services. Future payments (excluding Horizon) are based on minimum levels of flying by the third-party carriers, which could differ materially due to variable payments based on actual levels of flying and certain costs associated with operating flights such as fuel.

Aircraft Maintenance Deposits

The Company is contractually required to make maintenance deposit payments to aircraft lessors, which represent maintenance reserves made solely to collateralize the lessor for future maintenance events should the Company not perform required maintenance. Under most leases, the lease agreements provide that maintenance reserves are reimbursable upon completion of the major maintenance event in an amount equal to the lesser of (i) the amount qualified for reimbursement from maintenance reserves held by the lessor associated with the specific major maintenance event or (ii) the qualifying costs related to the specific major maintenance event.

Aircraft Maintenance and Parts Management

The Company has a separate maintenance-cost-per-hour contract for management and repair of certain rotable parts to support airframe and engine maintenance and repair. This agreement requires monthly payments based upon utilization, such as flight hours, cycles and age of the aircraft, and, in turn, the agreement transfers certain risks to the third-party service provider. There are minimum payments under this agreement, which are reflected in the table above. Accordingly, payments could differ materially based on actual aircraft utilization.

Contingencies

The Company is a party to routine litigation matters incidental to its business and with respect to which no material liability is expected. Liabilities for litigation related contingencies are recorded when a loss is determined to be probable and estimable.

In 2015, three flight attendants filed a class action lawsuit seeking to represent all Virgin America flight attendants for damages based on alleged violations of California and City of San Francisco wage and hour laws.  Plaintiffs received class certification in November 2016. Virgin America filed a motion for summary judgment seeking to dismiss all claims on various federal preemption grounds.  In January 2017, the Court denied in part and granted in part Virgin America’s motion.  Virgin America believes the claims in this case are without factual and legal merit and intends to defend this lawsuit through, among other strategies, filing a motion for reconsideration of the Court’s certification decision and denial of summary judgment and, if necessary, a motion for certification of interlocutory appeal to the U.S. Court of Appeals for the Ninth Circuit.

Management believes the ultimate disposition of these matters is not likely to materially affect the Company's financial position or results of operations. This forward-looking statement is based on management's current understanding of the relevant law and facts, and it is subject to various contingencies, including the potential costs and risks associated with litigation and the actions of arbitrators, judges and juries.

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SHAREHOLDER'S EQUITY

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

SHAREHOLDER'S EQUITY

SHAREHOLDERS' EQUITY

Common Stock Changes

During the second quarter of 2014, shareholders voted to increase the number of authorized shares from 100 million to 200 million shares and reduce the par value of common stock from $1 per share to $0.01 per share, and the Board of Directors declared a two-for-one stock split by means of a stock distribution. The additional shares were distributed on July 9, 2014, to the shareholders of record on June 23, 2014.

Dividends

During 2016, the Board of Directors declared dividends of $1.10 per share. The Company paid dividends of $136 million, $102 million and $68 million to shareholders of record during 2016, 2015 and 2014.

Subsequent to year-end, the Board of Directors declared a quarterly cash dividend of $0.30 per share to be paid in March 2017 to shareholders of record as of February 21, 2017. This is a 9% increase from the most recent quarterly dividends of $0.275 per share.

Common Stock Repurchase

In May 2014, the Board of Directors authorized a $650 million share repurchase program, which was completed in October 2015. In August 2015, the Board of Directors authorized a $1.0 billion share repurchase program, which was paused in the second quarter of 2016 in anticipation of the acquisition of Virgin America. At December 31, 2016, the Company held 5,861,583 shares in treasury. Management does not anticipate retiring common shares held in treasury for the foreseeable future.

Share repurchase activity (in millions, except shares):

	2016			2015			2014
	Shares	Amount		Shares	Amount		Shares	Amount
2015 $1 billion Repurchase Program	2,594,809	$	193	1,517,277	$	120	—	$	—
2014 $650 million Repurchase Program	—	—		5,691,051	385		5,497,427	265
2012 $250 million Repurchase Program	—	—		—	—		1,819,304	83
Total	2,594,809	$	193	7,208,328	$	505	7,316,731	$	348

Accumulated Other Comprehensive Loss (AOCL)

AOCL consisted of the following (in millions, net of tax):  

	2016			2015
Related to marketable securities	$	(3	)	$	(3	)
Related to employee benefit plans	(299		)	(288		)
Related to interest rate derivatives	(3		)	(12		)
	$	(305	)	$	(303	)

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SPECIAL ITEMS SPECIAL ITEMS

12 Months Ended

Dec. 31, 2016

SPECIAL ITEMS [Abstract]

Unusual or Infrequent Items Disclosure [Text Block]

SPECIAL ITEMS

In 2016, the Company recognized special items of $117 million for merger-related costs associated with its acquisition of Virgin America. Costs classified as merger-related are directly attributable to merger activities. $39 million of these costs were not deductible under U.S. federal tax law, as discussed in Note 7. The Company also recognized a special tax expense of $17 million representing the impact of adjustments to the Company's position on income sourcing in various states.

In 2015, the Company recognized special items of $32 million in aggregate. The special items comprise an expense of $14 million for a lump sum settlements offered to terminated and vested participants in the qualified defined benefit pension plans and a litigation-related matter. See Note 8 for more information regarding the pension settlement charge. The Company also recognized a special tax benefit of $26 million representing the discrete impacts of adjustments to the Company's position on income sourcing in various states.

In 2014, the Company recognized special items of $30 million. As discussed in Note 8, a $20 million benefit was recognized related to the curtailment of certain postretirement benefit plans. Furthermore, in 2014 the Company recorded a one-time gain of $10 million associated with the settlement of a legal matter.

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STOCK-BASED COMPENSATION PLANS

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS

The table below summarizes the components of total stock-based compensation (in millions):

	2016		2015		2014
Stock options	$	2	$	2	$	3
Stock awards	11		11		10
Deferred stock awards	1		1		1
Employee stock purchase plan	5		3		2
Stock-based compensation	$	19	$	17	$	16
Tax benefit related to stock-based compensation	$	7	$	7	$	6

Unrecognized stock-based compensation for non-vested options and awards and the weighted-average period the expense will be recognized (in millions):

	Amount		Weighted-Average Period
Stock options	$	2	1.1
Stock awards	21		0.9
Unrecognized stock-based compensation	$	23	0.9

The Company has various equity incentive plans under which it may grant stock awards to directors, officers and employees. The Company also has an employee stock purchase plan.

The Company is authorized to issue 17 million shares of common stock under these plans, of which 11,847,713 shares remain available for future grants of either options or stock awards as of December 31, 2016.

Stock Options

Stock options to purchase common stock are granted at the fair market value of the stock on the date of grant. The stock options granted have terms of up to ten years.

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used for grants:

	2016			2015			2014
Expected volatility	51		%	53		%	65		%
Expected term	6 years			6 years			6 years
Risk-free interest rate	1.23		%	1.67		%	1.87		%
Expected dividend yield	1.50		%	1.25		%	1.25		%
Weighted-average grant date fair value per share	$	27.14		$	28.71		$	21.70
Estimated fair value of options granted (millions)	$	2		$	3		$	3

The expected market price volatility is based on the historical volatility. The expected term is based on the estimated period of time until exercise based on historical experience. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected dividend yield is based on the estimated weighted average dividend yield over the expected term. The expected forfeiture rates are based on historical experience.

The tables below summarize stock option activity for the year ended December 31, 2016:

	Shares		Weighted- Average Exercise Price Per Share		Weighted- Average Contractual Life (Years)	Aggregate Intrinsic Value (in millions)
Outstanding, December 31, 2015	540,345		$	31.58	6.3	$	26
Granted	79,340		65.63
Exercised	(158,758	)	23.62
Canceled	—		—
Forfeited or expired	(7,253	)	49.66
Outstanding, December 31, 2016	453,674		$	40.02	6.2	$	22
Exercisable, December 31, 2016	199,676		$	25.35	5.1	$	13
Vested or expected to vest, December 31, 2016	453,435		$	40.03	6.2	$	22

(in millions)	2016		2015		2014
Intrinsic value of option exercises	$	9	$	14	$	20
Cash received from stock option exercises	3		4		6
Tax benefit related to stock option exercises	3		5		7
Fair value of options vested	3		3		2

Stock Awards

Restricted Stock Units ("RSUs") are awarded to eligible employees and entitle the grantee to receive shares of common stock at the end of the vest period. The fair value of the RSUs is based on the stock price on the date of grant. The RSUs “cliff vest” after three years, or the period from the date of grant to the employee’s retirement eligibility, and expense is recognized accordingly. Performance Share Units (PSUs) are awarded to certain executives to receive shares of common stock if specific performance goals and market conditions are achieved. There are several tranches of PSUs which vest when performance goals and market conditions are met.

The following table summarizes information about outstanding stock awards:

	Number of Units		Weighted-Average Grant Date Fair Value		Weighted- Average Contractual Life (Years)	Aggregate Intrinsic Value (in millions)
Non-vested, December 31, 2015	470,715		$	38.09	0.8	$	38
Granted	374,863		63.53
Vested	(366,319	)	32.87
Forfeited	(39,166	)	40.35
Non-vested, December 31, 2016	440,093		$	63.86	1.4	$	39

Deferred Stock Awards

Deferred Stock Units ("DSUs") are awarded to members of its Board of Directors as part of their retainers. The underlying common shares are issued upon retirement from the Board, but require no future service period. As a result, the entire intrinsic value of the awards is expensed on the date of grant.

Employee Stock Purchase Plan

The ESPP allows employees to purchase common stock at 85% of the stock price on the first day of the offering period or the specified purchase date, whichever is lower. Employees may contribute up to 10% of their base earnings during the offering period to purchase stock. Employees purchased 308,920, 281,058 and 298,283 shares in 2016, 2015 and 2014 under the ESPP.

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OPERATING SEGMENT INFORMATION

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Operating Segment Information

OPERATING SEGMENT INFORMATION

Alaska Air Group has three operating airlines—Alaska, Virgin America and Horizon. Each is a regulated airline by the U.S. Department of Transportation’s Federal Aviation Administration. Alaska has CPAs for regional capacity with Horizon, as well as with third-party carriers SkyWest and PenAir, under which Alaska receives all passenger revenues.

Under U.S. General Accepted Accounting Principles, operating segments are defined as components of a business for which there is discrete financial information that is regularly assessed by the Chief Operating Decision Maker ("CODM") in making resource allocation decisions. Financial performance for the operating airlines and CPAs is managed and reviewed by the Company's CODM as part of three reportable operating segments:

• Mainline - includes Alaska's and Virgin America’s scheduled air transportation for passengers and cargo throughout the U.S., and in parts of Canada, Mexico, Costa Rica and Cuba.

• Regional - includes Horizon's and other third-party carriers’ scheduled air transportation for passengers across a shorter distance network within the U.S. under CPAs. This segment includes the actual revenues and expenses associated with regional flying, as well as an allocation of corporate overhead incurred by Air Group on behalf of the regional operations.

• Horizon - includes the capacity sold to Alaska under CPA. Expenses include those typically borne by regional airlines such as crew costs, ownership costs and maintenance costs.

The CODM makes resource allocation decisions for these reporting segments based on flight profitability data, aircraft type, route economics and other financial information.

The "Consolidating and Other" column reflects parent company activity, consolidating entries and other immaterial business units of the company. The “Air Group Adjusted” column represents a non-GAAP measure that is used by the Company CODM to evaluate performance and allocate resources. Adjustments are further explained below in reconciling to consolidated GAAP results.

The operating segment information that follows (in millions) includes financial results for Virgin America for the period from December 14, 2016 to December 31, 2016 and the impact of purchase accounting as of December 14, 2016.

Year Ended December 31, 2016	Mainline(a)			Regional		Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	4,098		$	—	$	—		$	—		$	4,098		$	—		$	4,098
Regional	—			908		—			—			908			—			908
Total passenger revenues	4,098			908		—			—			5,006			—			5,006
CPA revenues	—			—		424			(424		)	—			—			—
Freight and mail	104			5		—			(1		)	108			—			108
Other-net	738			74		4			1			817			—			817
Total operating revenues	4,940			987		428			(424		)	5,931			—			5,931
Operating expenses
Operating expenses, excluding fuel	2,883			769		407			(425		)	3,634			117			3,751
Fuel expense	719			125		—			—			844			(13		)	831
Total operating expenses	3,602			894		407			(425		)	4,478			104			4,582
Nonoperating income (expense)
Interest income	26			—		1			—			27			—			27
Interest expense	(42		)	—		(9		)	(4		)	(55		)	—			(55		)
Other	19			—		1			4			24			—			24
	3			—		(7		)	—			(4		)	—			(4		)
Income (loss) before income tax	$	1,341		$	93	$	14		$	1		$	1,449		$	(104	)	$	1,345

Year Ended December 31, 2015	Mainline			Regional		Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	3,939		$	—	$	—		$	—		$	3,939		$	—		$	3,939
Regional	—			854		—			—			854			—			854
Total passenger revenues	3,939			854		—			—			4,793			—			4,793
CPA revenues	—			—		408			(408		)	—			—			—
Freight and mail	103			5		—			—			108			—			108
Other-net	621			72		4			—			697			—			697
Total operating revenues	4,663			931		412			(408		)	5,598			—			5,598
Operating expenses
Operating expenses, excluding fuel	2,653			695		375			(409		)	3,314			32			3,346
Fuel expense	823			131		—			—			954			—			954
Total operating expenses	3,476			826		375			(409		)	4,268			32			4,300
Nonoperating income (expense)
Interest income	19			—		—			2			21			—			21
Interest expense	(28		)	—		(10		)	(4		)	(42		)	—			(42		)
Other	28			—		1			6			35			—			35
	19			—		(9		)	4			14			—			14
Income (loss) before income tax	$	1,206		$	105	$	28		$	5		$	1,344		$	(32	)	$	1,312

Year Ended December 31, 2014	Mainline			Regional			Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	3,774		$	—		$	—		$	—		$	3,774		$	—		$	3,774
Regional	—			805			—			—			805			—			805
Total passenger revenues	3,774			805			—			—			4,579			—			4,579
CPA revenues	—			—			371			(371		)	—			—			—
Freight and mail	109			5			—			—			114			—			114
Other-net	592			78			5			—			675			—			675
Total operating revenues	4,475			888			376			(371		)	5,368			—			5,368
Operating expenses
Operating expenses, excluding fuel	2,417			623			349			(371		)	3,018			(30		)	2,988
Fuel expense	1,251			190			—			—			1,441			(23		)	1,418
Total operating expenses	3,668			813			349			(371		)	4,459			(53		)	4,406
Nonoperating income (expense)
Interest income	20			—			—			1			21			—			21
Interest expense	(32		)	—			(12		)	(4		)	(48		)	—			(48		)
Other	39			(1		)	2			—			40			—			40
	27			(1		)	(10		)	(3		)	13			—			13
Income (loss) before income tax	$	834		$	74		$	17		$	(3	)	$	922		$	53		$	975

(a) Includes Alaska activity for the full period and Virgin America financial results for the period December 14, 2016 through December 31, 2016, and the impacts associated with purchase accounting as of December 14, 2016.

(b) Includes consolidating entries, Parent Company and other immaterial business units.

(c) The adjusted column excludes certain charges described in (d) and represents the financial information that is reviewed by management to assess performance of operations and determine capital allocations.

(d) Includes accounting adjustments related to mark-to-market fuel hedge accounting charges (all years), merger-related costs (2016), pension settlement charge (2015), litigation-related matter (2015), non-cash curtailment gain (2014) and a gain related to a legal matter (2014).

	2016			2015			2014
Depreciation and amortization:
Mainline	$	296		$	268		$	243
Horizon	67			52			51
Consolidated	$	363		$	320		$	294
Capital expenditures:
Mainline	$	608		$	821		$	659
Horizon	70			10			35
Consolidated	$	678		$	831		$	694
Total assets at end of period:
Mainline	$	15,260		$	8,127
Horizon	690			717
Consolidating & Other	(5,988		)	(2,314		)
Consolidated	$	9,962		$	6,530

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GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Organization and Basis of Accounting, Policy [Policy Text Block]

Organization and Basis of Presentation

The consolidated financial statements include the accounts of Air Group, or the Company, and its primary subsidiaries, Alaska, Horizon and, starting December 14, 2016, Virgin America. The Company conducts substantially all of its operations through these subsidiaries. All significant intercompany balances and transactions have been eliminated. These financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America and their preparation requires the use of management’s estimates. Actual results may differ from these estimates.

Certain reclassifications have been made to prior year financial statements to conform to classifications used in the current year.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents

Cash equivalents consist of highly liquid investments with original maturities of three months or less, such as money market funds, commercial paper and certificates of deposit. They are carried at cost, which approximates market value. The Company reduces cash balances when funds are disbursed. Due to the time delay in funds clearing the banks, the Company normally maintains a negative balance in its cash disbursement accounts, which is reported as a current liability. The amount of the negative cash balance was $15 million and $12 million at December 31, 2016 and 2015 and is included in accounts payable, with the change in the balance during the year included in other financing activities in the consolidated statements of cash flows.

The Company's restricted cash balances are primarily used to guarantee various letters of credit, self-insurance programs or other contractual rights. Restricted cash consists of highly liquid securities with original maturities of three months or less. They are carried at cost, which approximates fair value.

Marketable Securities, Available-for-sale Securities, Policy [Policy Text Block]

Marketable Securities

Investments with original maturities of greater than three months and remaining maturities of less than one year are classified as short-term investments. Investments with maturities beyond one year may be classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. All cash equivalents and short-term investments are classified as available-for-sale and realized gains and losses are recorded using the specific identification method. Changes in market value, excluding other-than-temporary impairments, are reflected in accumulated other comprehensive loss ("AOCL").

Investments are considered to be impaired when a decline in fair value is judged to be other-than-temporary. The Company uses a systematic methodology that considers available quantitative and qualitative evidence in evaluating potential impairment. If the cost of an investment exceeds its fair value, management evaluates, among other factors, general market conditions, credit quality of debt instrument issuers, the duration and extent to which the fair value is less than cost, the Company's intent and ability to hold, or plans to sell, the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded to Other—net in the consolidated statements of operations and a new cost basis in the investment is established.

Receivables, Policy [Policy Text Block]

Receivables

Receivables are due on demand and consist primarily of airline traffic (including credit card) receivables, Mileage Plan™ partner receivables, amounts due from other airlines related to interline agreements, government tax authorities and other miscellaneous amounts due to the Company, and are net of an allowance for doubtful accounts. Management determines the allowance for doubtful accounts based on known troubled accounts and historical experience applied to an aging of accounts.

Inventory, Policy [Policy Text Block]

Inventories and Supplies—net

Expendable aircraft parts, materials and supplies are stated at average cost and are included in inventories and supplies—net. An obsolescence allowance for expendable parts is accrued based on estimated lives of the corresponding fleet type and salvage values. The allowance for expendable inventories was $36 million and $37 million at December 31, 2016 and 2015, respectively. Inventory and supplies—net also includes fuel inventory of $16 million and $14 million at December 31, 2016 and 2015, respectively. Repairable and rotable aircraft parts inventories are included in flight equipment.

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Equipment and Depreciation

Property and equipment are recorded at cost and depreciated using the straight-line method over their estimated useful lives less an estimated salvage value, which are as follows:

Aircraft and related flight equipment:
Boeing 737 and Airbus 319/320 aircraft	20-25 years
Bombardier Q400 aircraft	15 years
Buildings	25 - 30 years
Minor building and land improvements	10 years
Capitalized leases and leasehold improvements	Generally shorter of lease term or estimated useful life
Computer hardware and software	3-10 years
Other furniture and equipment	5-10 years

Salvage values used for aircraft are 10% of the fair value, but as aircraft near the end of their useful lives, management updates the salvage value estimates based on current market conditions and expected use of the aircraft. “Related flight equipment” includes rotable and repairable spare inventories, which are depreciated over the associated fleet life unless otherwise noted.

Beginning October 1, 2016, the Company changed its accounting estimate for the expected useful life of the B737 NextGen aircraft, which includes the B737-700, -800, -900, -900ER aircraft and the related parts, from 20 years to 25 years. The change in estimate was precipitated by management's annual accounting policy review, which considered market studies, asset performance and intended use, as well as industry benchmarking. The change in estimate was applied prospectively effective October 1, 2016. The impact of this change in estimate in 2016 is a $17 million decrease to depreciation and amortization expense.

Capitalized interest, based on the Company’s weighted-average borrowing rate, is added to the cost of the related asset, and is depreciated over the estimated useful life of the asset.

Maintenance and repairs are expensed when incurred. Major modifications that extend the life or improve the usefulness of aircraft are capitalized and depreciated over their estimated period of use.

The Company evaluates long-lived assets to be held and used for impairment whenever events or changes in circumstances indicate that the total carrying amount of an asset or asset group may not be recoverable. The Company groups assets for purposes of such reviews at the lowest level, at which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. An impairment loss is considered when estimated future undiscounted cash flows expected to result from the use of the asset or asset group and its eventual disposition are less than its carrying amount. If the asset or asset group is not considered recoverable, a write-down equal to the excess of the carrying amount over the fair value will be recorded.

Goodwill

Goodwill

Goodwill represents the excess of purchase price over the fair value of the related net assets acquired in the Company's acquisition of Virgin America and is not amortized. As of December 31, 2016 the goodwill balance, based on a provisional purchase price allocation, was $1.9 billion. No goodwill impairment test occurred in 2016, as the acquisition was completed late in the fourth quarter. In future periods, the Company will review goodwill for impairment at least annually, or more frequently if events or circumstances indicate than an impairment may exist. The Company will perform this impairment at the reporting unit level. If fair value of the reporting unit exceeds the carrying amount, an impairment charge may be recorded.

Intangible Assets

Intangible Assets

Intangible assets as of December 31, 2016 were recorded as a result of the acquisition of Virgin America, and consist primarily of indefinite-lived airport slots, finite-lived airport gates and finite-lived customer relationships. Finite-lived intangibles are amortized over their estimated useful lives. Indefinite-lived intangibles are not amortized but are tested at least annually for impairment using a similar methodology to property, equipment and goodwill as described above.

Internal Use Software, Policy [Policy Text Block]

Internally Used Software Costs

The Company capitalizes costs to develop internal-use software that are incurred in the application development stage. Amortization commences when the software is ready for its intended use and the amortization period is the estimated useful life of the software, generally three to five years. Capitalized costs primarily include contract labor and payroll costs of the individuals dedicated to the development of internal-use software.

Revenue Recognition, Deferred Revenue [Policy Text Block]

Deferred Revenue

Deferred revenue results primarily from the sale of Mileage Plan™ miles and Elevate® points to third-parties. It also includes the liability for Elevate® flown points outstanding at the acquisition date that was recorded at its estimated fair value as part of purchase price accounting. The related revenue is recognized when award transportation is provided or over the term of the applicable agreement.

Lease, Policy [Policy Text Block]

Operating Leases

The Company leases aircraft, airport and terminal facilities, office space and other equipment under operating leases. Some of these lease agreements contain rent escalation clauses or rent holidays. For scheduled rent escalation clauses during the lease terms or for rental payments commencing at a date other than the date of initial occupancy, the Company records minimum rental expenses on a straight-line basis over the terms of the leases in the consolidated statements of operations.

Leased Aircraft Return Costs [Policy Text Block]

Leased Aircraft Return Costs

Cash payments associated with returning leased aircraft are accrued when it is probable that a cash payment will be made and that amount is reasonably estimable, usually no sooner than after the last scheduled maintenance event prior to lease return. Any accrual is based on the time remaining on the lease, planned aircraft usage and the provisions included in the lease agreement, although the actual amount due to any lessor upon return may not be known with certainty until lease termination.

As leased aircraft are returned, any payments are charged against the established accrual. The accrual is part of other current and long-term liabilities and was not material as of December 31, 2016 and December 31, 2015. The expense is included in Aircraft maintenance in the consolidated statements of operations.

Revenue Recognition, Policy [Policy Text Block]

Revenue Recognition

Passenger revenue is recognized when the passenger travels. Tickets sold but not yet used are reported as air traffic liability until travel or date of expiration. Air traffic liability includes approximately $62 million and $42 million related to credits for future travel, as of December 31, 2016 and December 31, 2015, respectively. These credits are recognized into revenue either when the passenger travels or at the date of expiration, which is twelve months from issuance. Commissions to travel agents and related fees are expensed when the related revenue is recognized. Passenger traffic commissions and related fees not yet recognized are recorded as a prepaid expense. Taxes collected from passengers, including transportation excise taxes, airport and security fees and other fees, are recorded on a net basis within passenger revenue in the consolidated statements of operations. Due to complex pricing structures, refund and exchange policies, and interline agreements with other airlines, certain amounts are recognized as revenue using estimates regarding both the timing of the revenue recognition and the amount of revenue to be recognized. These estimates are based on the Company’s historical data.

Freight and mail revenues are recognized when the related services are provided.

Other—net revenues are primarily related to the Mileage Plan™ and Elevate® programs. They are recognized as described in the “Frequent Flyer Programs” paragraph below. Other—net also includes certain ancillary or non-ticket revenues, such as checked-bag fees, reservations fees, ticket change fees, on-board food and beverage sales, and, to a much lesser extent, commissions from car and hotel vendors and sales of travel insurance. These items are recognized as revenue when the related services are provided.  Airport lounge memberships are recognized as revenue over the membership period.

Frequent Flier Program, Policy [Policy Text Block]

Frequent Flyer Programs

Alaska operates the Mileage Plan™ frequent flyer program, and Virgin America operates the Elevate® frequent flyer program. Both programs provide travel awards to members based on accumulated mileage or points. For miles or points earned by flying on the Company's airlines and through airline partners, the estimated cost of providing award travel is recognized as a selling expense and accrued as a liability, as miles are earned and accumulated.

Alaska and Virgin America also sell services, including miles or points for transportation, to non-airline partners, such as hotels, car rental agencies and major banks that offer Alaska's and Virgin America's affinity credit cards. The Company defers revenue related to air transportation and certificates for discounted companion travel until the transportation is delivered. The deferred proceeds are recognized as passenger revenue for awards redeemed and flown on the Company's airlines and as Other—net revenue for awards redeemed and flown on other airlines (less the cost paid to the other airlines based on contractual agreements). The elements that represent use of the Alaska and Virgin America brands and access to frequent flyer member lists and advertising are recognized as commission income in the period that those elements are sold and included in Other—net revenue in the consolidated statements of operations.

Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block]

Selling Expenses

Selling expenses include credit card fees, global distribution systems charges, the estimated cost of frequent flyer travel awards earned through air travel, advertising, promotional costs, commissions and incentives. Advertising production costs are expensed as incurred.

Derivatives, Policy [Policy Text Block]

Derivative Financial Instruments

The Company's operations are significantly impacted by changes in aircraft fuel prices and interest rates. In an effort to manage exposure to these risks, the Company periodically enters into fuel and interest rate derivative instruments. These derivative instruments are recognized at fair value on the balance sheet and changes in the fair value are recognized in AOCL or in the consolidated statements of operations, depending on the nature of the instrument.

The Company does not hold or issue derivative fuel hedge contracts for trading purposes and does not apply hedge accounting. For cash flow hedges related to interest rate swaps, the effective portion of the derivative represents the change in fair value of the hedge that offsets the change in fair value of the hedged item. To the extent the change in the fair value of the hedge does not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the hedge is immediately recognized in interest expense.

Fair Value of Financial Instruments, Policy [Policy Text Block]

Fair Value Measurements

Accounting standards define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The standards also establish a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The Company has elected not to use the fair value option provided in the accounting standards for non-financial instruments. Accordingly, those assets and liabilities are carried at amortized cost. For financial instruments, the assets and liabilities are carried at fair value, which is determined based on the market approach or income approach, depending upon the level of inputs used.

Assets and liabilities recognized or disclosed at fair value on a nonrecurring basis include items such as property, plant and equipment, goodwill, intangible assets and certain other assets and liabilities. The Company determines the fair value of these items using Level 3 inputs, as described in Note 2 and Note 5.

Income Tax, Policy [Policy Text Block]

Income Taxes

The Company uses the asset and liability approach for accounting for and reporting income taxes. Deferred tax assets and liabilities are recognized for future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and for operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. A valuation allowance would be established, if necessary, for the amount of any tax benefits that, based on available evidence, are not expected to be realized. As of December 31, 2016, there is a partial valuation allowance against net deferred tax assets. The Company accounts for unrecognized tax benefits in accordance with the applicable accounting standards.

Virgin America has substantial federal and state net operating losses ("NOLs") for income tax purposes. The Company's ability to utilize Virgin America's NOLs could be limited if Virgin America had an “ownership change,” as defined in Section 382 of the Internal Revenue Code and similar state provisions. In general terms, an ownership change can occur whenever there is a collective shift in the ownership of a company by more than 50% by one or more “5% stockholders” within a three-year period. The occurrence of such a change generally limits the amount of NOL carryforwards a company could utilize in a given year to the aggregate fair market value of the company's common stock immediately prior to the ownership change, multiplied by the long-term tax-exempt interest rate in effect for the month of the ownership change. The acquisition constituted an ownership change and the potential for further limitations following the acquisition. See Note 7 to the consolidated financial statements for more discussion of the calculation.

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Stock-Based Compensation

Accounting standards require companies to recognize as expense the fair value of stock options and other equity-based compensation issued to employees as of the grant date. These standards apply to all stock awards that the Company grants to employees as well as the Company’s Employee Stock Purchase Plan ("ESPP"), which features a look-back provision and allows employees to purchase stock at a 15% discount. All stock-based compensation expense is recorded in wages and benefits in the consolidated statements of operations.

Earnings Per Share, Policy [Policy Text Block]

Earnings Per Share (EPS)

Diluted EPS is calculated by dividing net income by the average common shares outstanding plus additional common shares that would have been outstanding assuming the exercise of in-the-money stock options and restricted stock units, using the treasury-stock method. In 2016, 2015, and 2014, antidilutive stock options excluded from the calculation of EPS were not material.

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers"(Topic 606), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. This comprehensive new standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. In March 2016, the FASB issued ASU 2016-08, "Revenue from Contracts with Customers (Topic 606), Principal versus Agent Considerations" to clarify the guidance on determining whether the Company is considered the principal or the agent in a revenue transaction where a third party is providing goods or services to a customer. Entities are permitted to use either a full retrospective or cumulative effect transition method, and are required to adopt all parts of the new revenue standard using the same transition method. The new standard is effective for the Company on January 1, 2018. At this time, the Company believes the most significant impact to the financial statements will be to Mileage Plan™ revenues and liabilities. The Company currently uses the incremental cost approach for miles earned through travel. As this approach will be eliminated with the standard, the Company will be required to significantly increase its liability for earned miles through a relative selling price model. The Company continues to evaluate and model the full impact of the standard and currently plans to apply the full retrospective transition method.

In April 2015, the FASB issued ASU 2015-03, "Interest—Imputation of Interest" (Subtopic 835-30), which requires debt issuance costs related to a debt liability be presented as a direct deduction from the carrying value of the debt liability. The amendment was adopted as of January 1, 2016. Prior period debt balances have been adjusted to reflect the adoption of the ASU. The adoption of the ASU had no impact on the statements of operations or retained earnings.

In February 2016, the FASB issued ASU 2016-02, "Leases" (Topic 842), which requires lessees to recognize assets and liabilities for leases currently classified as operating leases. Under the new standard a lessee will recognize a liability on the balance sheet representing the lease payments owed, and a right-of-use-asset representing its right to use the underlying asset for the lease term. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election not to recognize lease assets and lease liabilities. The new standard is effective for the Company on January 1, 2019. Early adoption of the standard is permitted. At this time, the Company believes the most significant impact to the financial statements will relate to the recording of a right of use asset associated with leased aircraft. Other leases, including airports and real estate, equipment, software and other miscellaneous leases continue to be assessed for impact as it relates to ASU 2016-02. The Company has not yet determined whether it will early adopt the standard.

In March 2016, the FASB issued ASU 2016-09, "Compensation—Stock Compensation" (Topic 718), which simplifies several aspects of accounting for employee share-based payment awards, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The ASU is effective for the Company beginning January 1, 2017. The adoption of the standard will not have a material impact on the Company's statements of operations or financial position.

In January 2017, the FASB issued ASU 2017-04, "Intangibles—Goodwill and Other" (Topic 350), which eliminates step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The ASU is effective for the Company beginning January 1, 2019. Early adoption of the standard is permitted. Beginning in fiscal 2017 the Company will be required to perform an impairment test for goodwill arising from its acquisition of Virgin America and plans to adopt the standard in 2017.

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GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment are recorded at cost and depreciated using the straight-line method over their estimated useful lives less an estimated salvage value, which are as follows:

Aircraft and related flight equipment:
Boeing 737 and Airbus 319/320 aircraft	20-25 years
Bombardier Q400 aircraft	15 years
Buildings	25 - 30 years
Minor building and land improvements	10 years
Capitalized leases and leasehold improvements	Generally shorter of lease term or estimated useful life
Computer hardware and software	3-10 years
Other furniture and equipment	5-10 years

Salvage values used for aircraft are 10% of the fair value, but as aircraft near the end of their useful lives, management updates the salvage value estimates based on current market conditions and expected use of the aircraft. “Related flight equipment” includes rotable and repairable spare inventories, which are depreciated over the associated fleet life unless otherwise noted.

Liabilities from Mileage Plan [Table Text Block]

Frequent flyer program deferred revenue and liabilities included in the consolidated balance sheets (in millions):

	2016		2015
Current Liabilities:
Other accrued liabilities	$	484	$	368
Other Liabilities and Credits:
Deferred revenue	638		427
Other liabilities	21		19
Total	$	1,143	$	814

Revenue from Mileage Plan [Table Text Block]

Frequent flyer program revenue included in the consolidated statements of operations (in millions):

	2016		2015		2014
Passenger revenues	$	293	$	267	$	246
Other—net revenues	429		329		295
Total frequent flyer program revenues	$	722	$	596	$	541

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ACQUISITION OF VIRGIN AMERICA, INC. (Tables)

12 Months Ended

Dec. 31, 2016

Business Combinations [Abstract]

Schedule of Fair Value of Consideration Transferred

The fair value of consideration transferred on the closing date includes the value of the cash consideration and accelerated and vested equity awards attributable to pre-acquisition service. The purchase price is as follows (in millions, except per-share stock price):

	December 14, 2016
Number of shares of Virgin America common stock issued and outstanding	44.645
Multiplied by cash consideration for each share of common stock per the merger agreement	$	57.00
Cash consideration paid for common stock issued and outstanding	2,545
Accelerated and vested equity awards attributable to pre-acquisition service	51
Total Purchase Price	$	2,596

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

Provisional fair value of the assets acquired and the liabilities assumed as of the acquisition date, December 14, 2016, (in millions) are as follows:

	December 14, 2016
Cash and cash equivalents	$	645
Receivables	44
Prepaid expenses and other current assets	16
Property and equipment	560
Intangible assets	143
Goodwill	1,934
Other assets	84
Total assets	3,426
Accounts payable	22
Accrued wages, vacation and payroll taxes	51
Air traffic liabilities	172
Other accrued liabilities	196
Current portion of long-term debt	125
Long-term debt, net of current portion	360
Deferred income taxes	(304		)
Deferred revenue	126
Other liabilities	82
Total liabilities	830
Total purchase price	$	2,596

Business Acquisition, Pro Forma Information

Accordingly, the unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated as of January 1, 2015.

(in millions, except per share amounts)	Years Ended December 31,
	2016		2015
Revenue	$	7,511	$	7,111
Net Income	1,008		914

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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2016

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Schedule of Cash, Cash Equivalents and Short-term Investments [Table Text Block]

Components for cash, cash equivalents and marketable securities (in millions):

December 31, 2016	Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Cash	$	283	$	—	$	—		$	283
Cash equivalents	45		—		—			45
Cash and cash equivalents	328		—		—			328
U.S. government and agency securities	290		—		(3		)	287
Foreign government bonds	36		—		—			36
Asset-backed securities	138		—		—			138
Mortgage-backed securities	89		—		—			89
Corporate notes and bonds	693		2		(4		)	691
Municipal securities	11		—		—			11
Marketable securities	1,257		2		(7		)	1,252
Total	$	1,585	$	2	$	(7	)	$	1,580

December 31, 2015	Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
Cash	$	4	$	—	$	—		$	4
Cash equivalents	69		—		—			69
Cash and cash equivalents	73		—		—			73
U.S. government and agency securities	254		—		(1		)	253
Foreign government bonds	31		—		—			31
Asset-backed securities	130		—		—			130
Mortgage-backed securities	117		—		(1		)	116
Corporate notes and bonds	711		1		(4		)	708
Municipal securities	17		—		—			17
Marketable securities	1,260		1		(6		)	1,255
Total	$	1,333	$	1	$	(6	)	$	1,328

Schedule of Realized Gain (Loss) [Table Text Block]

Activity for marketable securities (in millions):  

	2016			2015			2014
Proceeds from sales and maturities	$	962		$	1,175		$	1,092
Gross realized gains	3			2			4
Gross realized losses	(1		)	(3		)	(2		)

Schedule of Debt Investment Maturities [Table Text Block]

Maturities for marketable securities (in millions):

December 31, 2016	Cost Basis		Fair Value
Due in one year or less	$	182	$	182
Due after one year through five years	1,070		1,065
Due after five years through 10 years	5		5
Due after 10 years	—		—
Total	$	1,257	$	1,252

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DERIVATIVE INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Fair values of derivative instruments on the consolidated balance sheet (in millions):

	2016			2015
Derivative Instruments Not Designated as Hedges
Fuel hedge contracts
Prepaid expenses and other current assets	$	17		$	2
Other assets	3			2
Derivative Instruments Designated as Hedges
Interest rate swaps
Other accrued liabilities	(5		)	(5		)
Other liabilities	—			(13		)
Losses in accumulated other comprehensive loss (AOCL)	(5		)	(18		)

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]

Pretax effect of derivative instruments on earnings and AOCL (in millions):

	2016			2015			2014
Derivative Instruments Not Designated as Hedges
Fuel hedge contracts
Gains (losses) recognized in Aircraft fuel	$	(3	)	$	(19	)	$	(18	)
Derivative Instruments Designated as Hedges
Interest rate swaps
Gains (losses) recognized in Aircraft rent	(6		)	(6		)	(6		)
Gains (losses) recognized in other comprehensive income (OCI)	8			(5		)	(8		)

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FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

Fair values of financial instruments on the consolidated balance sheet (in millions):

December 31, 2016	Level 1		Level 2			Total
Assets
Marketable securities
U.S. government and agency securities	$	287	$	—		$	287
Foreign government bonds	—		36			36
Asset-backed securities	—		138			138
Mortgage-backed securities	—		89			89
Corporate notes and bonds	—		691			691
Municipal securities	—		11			11
Derivative instruments
Fuel hedge contracts—call options	—		20			20
Liabilities
Derivative instruments
Interest rate swap agreements	—		(5		)	(5		)

December 31, 2015	Level 1		Level 2			Total
Assets
Marketable securities
U.S. government and agency securities	$	253	$	—		$	253
Foreign government bonds	—		31			31
Asset-backed securities	—		130			130
Mortgage-backed securities	—		116			116
Corporate notes and bonds	—		708			708
Municipal securities	—		17			17
Derivative instruments
Fuel hedge contracts—call options	—		4			4
Liabilities
Derivative instruments
Interest rate swap agreements	—		(18		)	(18		)

Fixed-rate debt that is not carried at fair value on the consolidated balance sheet and the estimated fair value of long-term fixed-rate debt (in millions):

	2016		2015
Carrying amount	$	1,179	$	520
Fair value	1,199		557

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LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt obligations (in millions):

	2016			2015
Fixed-rate notes payable due through 2028	$	1,179		$	520
Variable-rate notes payable due through 2028	1,803			166
Less debt issuance costs	(18		)	(3		)
Long-term debt	2,964			683
Less current portion	319			114
	$	2,645		$	569
Weighted-average fixed-interest rate	4.4		%	5.7		%
Weighted-average variable-interest rate	2.4		%	1.8		%

Schedule of Maturities of Long-term Debt [Table Text Block]

Long-term debt principal payments for the next five years and thereafter (in millions):

	Total
2017	$	321
2018	351
2019	424
2020	451
2021	424
Thereafter	1,007
Total principal payments	$	2,978

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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Deferred tax (assets) and liabilities comprise the following (in millions):

	2016			2015
Excess of tax over book depreciation	$	1,282		$	1,110
Intangibles	39			—
Other—net	26			23
Gross deferred tax liabilities	1,347			1,133
Mileage Plan™	(310		)	(208		)
Inventory obsolescence	(23		)	(22		)
Deferred gains	(8		)	(8		)
Employee benefits	(196		)	(167		)
Fuel hedge contracts	—			(5		)
Acquired net operating losses	(289		)	—
Other—net	(62		)	(41		)
Gross deferred tax assets	(888		)	(451		)
Valuation allowance	4			—
Net deferred tax (assets) liabilities	$	463		$	682

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The components of income tax expense were as follows (in millions): 

	2016		2015			2014
Current income tax expense:
Federal	$	392	$	397		$	229
State	48		30			27
Total current income tax expense	440		427			256
Deferred income tax expense:
Federal	77		60			103
State	14		(23		)	11
Total deferred income tax expense	91		37			114
Income tax expense	$	531	$	464		$	370

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Income tax expense reconciles to the amount computed by applying the U.S. federal rate of 35% to income before income tax and accounting changes as follows (in millions):

	2016			2015			2014
Income before income tax	$	1,345		$	1,312		$	975
Expected tax expense	471			459			341
Nondeductible expenses	20			4			4
State income taxes	28			19			25
State income sourcing	13			(15		)	—
Other—net	(1		)	(3		)	—
Actual tax expense	$	531		$	464		$	370
Effective tax rate	39.5		%	35.4		%	37.9		%

Summary of Income Tax Contingencies [Table Text Block]

The Company has identified its federal tax return and its state tax returns in Alaska, Oregon and California as “major” tax jurisdictions.  A summary of the Company's jurisdictions and the periods that are subject to examination are as follows:

Jurisdiction	Period
Federal	2006 to 2015 (a)(b)
Alaska	2012 to 2015
California	2006 to 2015(a)
Oregon	2003 to 2015(a)

(a) The 2003, 2004, 2008-2010 and 2011 Oregon tax returns are subject to examination only to the extent of net operating loss carryforwards from those years that were utilized in 2010 and later years. The 2006-2012 Federal and California Virgin America tax returns are subject to examination only to the extent of net operating loss carryforwards from those years that were utilized in 2012 and later years.

Changes in the liability for unrecognized tax benefits during 2016, 2015 and 2014 are as follows (in millions):

	2016		2015		2014
Balance at January 1,	$	22	$	3	$	2
Additions based on tax positions and settlements related to the current year	3		19		1
Additions from acquisitions	8		—		—
Balance at December 31,	$	33	$	22	$	3

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EMPLOYEE BENEFIT PLANS (Tables) - Qualified Defined Benefit [Member]

12 Months Ended

Dec. 31, 2016

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Assumptions Used [Table Text Block]

Weighted average assumptions used to determine benefit obligations:

	2016	2015
Discount rates (a)	4.29% to 4.50%	4.55% to 4.69%
Rate of compensation increases(a)	2.12% to 2.59%	2.06% to 2.65%

^(a)  Varies by plan and related work group.

Weighted average assumptions used to determine net periodic benefit cost:

	2016	2015	2014
Discount rates(a)	4.55% to 4.69%	4.20%	4.85%
Expected return on plan assets(a)	6.00% to 6.50%	6.50%	6.75%
Rate of compensation increases(a)	2.06% to 2.65%	2.85% to 3.91%	2.90% to 3.93%

^(a)  Varies by plan and related work group.

Schedule of Allocation of Plan Assets [Table Text Block]

The target and actual asset allocation of the funds in the qualified defined-benefit plans, by asset category, are as follows: 

	Target	2016		2015
Asset category:
Domestic equity securities	22% - 33%	30	%	28	%
Non-U.S. equity securities	9% - 16%	12	%	12	%
Fixed income securities	48% - 67%	53	%	55	%
Real estate	0% - 8%	5	%	5	%
Plan assets		100	%	100	%

Plan asset by fund category (in millions):

	2016		2015		Fair Value Hierarchy
Fund type:
U.S. equity market fund	$	545	$	491	1
Non-U.S. equity fund	218		208		1
Credit bond index fund	992		953		1
Plan assets in common commingled trusts	$	1,755	$	1,652
Real estate	91		85		(a)
Total plan assets	$	1,846	$	1,737

Schedule of Net Funded Status [Table Text Block]

The following table sets forth the status of the qualified defined-benefit pension plans (in millions):

	2016			2015
Projected benefit obligation ("PBO")
Beginning of year	$	1,898		$	2,050
Service cost	37			41
Interest cost	73			84
Plan settlement	—			(62		)
Actuarial (gain) loss	104			(140		)
Benefits paid	(69		)	(75		)
End of year	$	2,043		$	1,898
Plan assets at fair value
Beginning of year	$	1,737		$	1,917
Actual return on plan assets	178			(43		)
Employer contributions	—			—
Plan settlement	—			(62		)
Benefits paid	(69		)	(75		)
End of year	$	1,846		$	1,737
Funded status (unfunded)	$	(197	)	$	(161	)
Percent funded	90		%	92		%

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

The amounts recognized in the consolidated balance sheets (in millions): 

	2016			2015
Accrued benefit liability-long term	$	225		$	173
Plan assets-long term (within Other noncurrent assets)	(28		)	(12		)
Total liability recognized	$	197		$	161

The amounts not yet reflected in net periodic benefit cost and included in AOCL (in millions):

	2016			2015
Prior service credit	$	(10	)	$	(11	)
Net loss	509			499
Amount recognized in AOCL (pretax)	$	499		$	488

Schedule of Net Benefit Costs [Table Text Block]

Net pension expense for the qualified defined-benefit plans included the following components (in millions): 

	2016			2015			2014
Service cost	$	37		$	41		$	33
Interest cost	73			84			81
Expected return on assets	(108		)	(122		)	(117		)
Amortization of prior service credit	(1		)	(1		)	(1		)
Recognized actuarial loss	25			26			13
Settlement expense (special item)	—			14			—
Net pension expense	$	26		$	42		$	9

Schedule of Expected Benefit Payments [Table Text Block]

Future benefits expected to be paid over the next ten years under the qualified defined-benefit pension plans from the assets of those plans (in millions): 

	Total
2017	$	85
2018	93
2019	96
2020	109
2021	109
2022– 2026	652

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COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases and Unrecorded Unconditional Purchase Obligtaions [Table Text Block]

Future minimum payments for commitments as of December 31, 2016 (in millions):

	Aircraft Leases		Facility Leases		Aircraft Purchase Commitments		Capacity Purchase Agreements		Aircraft Maintenance Deposits		Aircraft Maintenance and Parts Management
2017	$	302	$	123	$	926	$	76	$	59	$	30
2018	316		73		848		80		61		32
2019	305		63		694		85		65		35
2020	279		57		354		90		68		37
2021	242		50		277		94		63		40
Thereafter	953		171		361		676		90		—
Total	$	2,397	$	537	$	3,460	$	1,101	$	406	$	174

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SHAREHOLDER'S EQUITY (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of Treasury Stock by Class [Table Text Block]

Share repurchase activity (in millions, except shares):

	2016			2015			2014
	Shares	Amount		Shares	Amount		Shares	Amount
2015 $1 billion Repurchase Program	2,594,809	$	193	1,517,277	$	120	—	$	—
2014 $650 million Repurchase Program	—	—		5,691,051	385		5,497,427	265
2012 $250 million Repurchase Program	—	—		—	—		1,819,304	83
Total	2,594,809	$	193	7,208,328	$	505	7,316,731	$	348

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

AOCL consisted of the following (in millions, net of tax):  

	2016			2015
Related to marketable securities	$	(3	)	$	(3	)
Related to employee benefit plans	(299		)	(288		)
Related to interest rate derivatives	(3		)	(12		)
	$	(305	)	$	(303	)

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STOCK-BASED COMPENSATION PLANS (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

The table below summarizes the components of total stock-based compensation (in millions):

	2016		2015		2014
Stock options	$	2	$	2	$	3
Stock awards	11		11		10
Deferred stock awards	1		1		1
Employee stock purchase plan	5		3		2
Stock-based compensation	$	19	$	17	$	16
Tax benefit related to stock-based compensation	$	7	$	7	$	6

Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block]

Unrecognized stock-based compensation for non-vested options and awards and the weighted-average period the expense will be recognized (in millions):

	Amount		Weighted-Average Period
Stock options	$	2	1.1
Stock awards	21		0.9
Unrecognized stock-based compensation	$	23	0.9

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used for grants:

	2016			2015			2014
Expected volatility	51		%	53		%	65		%
Expected term	6 years			6 years			6 years
Risk-free interest rate	1.23		%	1.67		%	1.87		%
Expected dividend yield	1.50		%	1.25		%	1.25		%
Weighted-average grant date fair value per share	$	27.14		$	28.71		$	21.70
Estimated fair value of options granted (millions)	$	2		$	3		$	3

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The tables below summarize stock option activity for the year ended December 31, 2016:

	Shares		Weighted- Average Exercise Price Per Share		Weighted- Average Contractual Life (Years)	Aggregate Intrinsic Value (in millions)
Outstanding, December 31, 2015	540,345		$	31.58	6.3	$	26
Granted	79,340		65.63
Exercised	(158,758	)	23.62
Canceled	—		—
Forfeited or expired	(7,253	)	49.66
Outstanding, December 31, 2016	453,674		$	40.02	6.2	$	22
Exercisable, December 31, 2016	199,676		$	25.35	5.1	$	13
Vested or expected to vest, December 31, 2016	453,435		$	40.03	6.2	$	22

(in millions)	2016		2015		2014
Intrinsic value of option exercises	$	9	$	14	$	20
Cash received from stock option exercises	3		4		6
Tax benefit related to stock option exercises	3		5		7
Fair value of options vested	3		3		2

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

The following table summarizes information about outstanding stock awards:

	Number of Units		Weighted-Average Grant Date Fair Value		Weighted- Average Contractual Life (Years)	Aggregate Intrinsic Value (in millions)
Non-vested, December 31, 2015	470,715		$	38.09	0.8	$	38
Granted	374,863		63.53
Vested	(366,319	)	32.87
Forfeited	(39,166	)	40.35
Non-vested, December 31, 2016	440,093		$	63.86	1.4	$	39

XML

OPERATING SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

operating segment information that follows (in millions) includes financial results for Virgin America for the period from December 14, 2016 to December 31, 2016 and the impact of purchase accounting as of December 14, 2016.

Year Ended December 31, 2016	Mainline(a)			Regional		Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	4,098		$	—	$	—		$	—		$	4,098		$	—		$	4,098
Regional	—			908		—			—			908			—			908
Total passenger revenues	4,098			908		—			—			5,006			—			5,006
CPA revenues	—			—		424			(424		)	—			—			—
Freight and mail	104			5		—			(1		)	108			—			108
Other-net	738			74		4			1			817			—			817
Total operating revenues	4,940			987		428			(424		)	5,931			—			5,931
Operating expenses
Operating expenses, excluding fuel	2,883			769		407			(425		)	3,634			117			3,751
Fuel expense	719			125		—			—			844			(13		)	831
Total operating expenses	3,602			894		407			(425		)	4,478			104			4,582
Nonoperating income (expense)
Interest income	26			—		1			—			27			—			27
Interest expense	(42		)	—		(9		)	(4		)	(55		)	—			(55		)
Other	19			—		1			4			24			—			24
	3			—		(7		)	—			(4		)	—			(4		)
Income (loss) before income tax	$	1,341		$	93	$	14		$	1		$	1,449		$	(104	)	$	1,345

Year Ended December 31, 2015	Mainline			Regional		Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	3,939		$	—	$	—		$	—		$	3,939		$	—		$	3,939
Regional	—			854		—			—			854			—			854
Total passenger revenues	3,939			854		—			—			4,793			—			4,793
CPA revenues	—			—		408			(408		)	—			—			—
Freight and mail	103			5		—			—			108			—			108
Other-net	621			72		4			—			697			—			697
Total operating revenues	4,663			931		412			(408		)	5,598			—			5,598
Operating expenses
Operating expenses, excluding fuel	2,653			695		375			(409		)	3,314			32			3,346
Fuel expense	823			131		—			—			954			—			954
Total operating expenses	3,476			826		375			(409		)	4,268			32			4,300
Nonoperating income (expense)
Interest income	19			—		—			2			21			—			21
Interest expense	(28		)	—		(10		)	(4		)	(42		)	—			(42		)
Other	28			—		1			6			35			—			35
	19			—		(9		)	4			14			—			14
Income (loss) before income tax	$	1,206		$	105	$	28		$	5		$	1,344		$	(32	)	$	1,312

Year Ended December 31, 2014	Mainline			Regional			Horizon			Consolidating & Other(b)			Air Group Adjusted(c)			Special Items(d)			Consolidated
Operating revenues
Passenger
Mainline	$	3,774		$	—		$	—		$	—		$	3,774		$	—		$	3,774
Regional	—			805			—			—			805			—			805
Total passenger revenues	3,774			805			—			—			4,579			—			4,579
CPA revenues	—			—			371			(371		)	—			—			—
Freight and mail	109			5			—			—			114			—			114
Other-net	592			78			5			—			675			—			675
Total operating revenues	4,475			888			376			(371		)	5,368			—			5,368
Operating expenses
Operating expenses, excluding fuel	2,417			623			349			(371		)	3,018			(30		)	2,988
Fuel expense	1,251			190			—			—			1,441			(23		)	1,418
Total operating expenses	3,668			813			349			(371		)	4,459			(53		)	4,406
Nonoperating income (expense)
Interest income	20			—			—			1			21			—			21
Interest expense	(32		)	—			(12		)	(4		)	(48		)	—			(48		)
Other	39			(1		)	2			—			40			—			40
	27			(1		)	(10		)	(3		)	13			—			13
Income (loss) before income tax	$	834		$	74		$	17		$	(3	)	$	922		$	53		$	975

(a) Includes Alaska activity for the full period and Virgin America financial results for the period December 14, 2016 through December 31, 2016, and the impacts associated with purchase accounting as of December 14, 2016.

(b) Includes consolidating entries, Parent Company and other immaterial business units.

(c) The adjusted column excludes certain charges described in (d) and represents the financial information that is reviewed by management to assess performance of operations and determine capital allocations.

(d) Includes accounting adjustments related to mark-to-market fuel hedge accounting charges (all years), merger-related costs (2016), pension settlement charge (2015), litigation-related matter (2015), non-cash curtailment gain (2014) and a gain related to a legal matter (2014).

	2016			2015			2014
Depreciation and amortization:
Mainline	$	296		$	268		$	243
Horizon	67			52			51
Consolidated	$	363		$	320		$	294
Capital expenditures:
Mainline	$	608		$	821		$	659
Horizon	70			10			35
Consolidated	$	678		$	831		$	694
Total assets at end of period:
Mainline	$	15,260		$	8,127
Horizon	690			717
Consolidating & Other	(5,988		)	(2,314		)
Consolidated	$	9,962		$	6,530

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GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CASH AND CASH EQUIVALENTS (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Negative cash balance	$ 15	$ 12

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - INVENTORIES AND SUPPLIES - NET (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Allowance for all non-surplus expendable inventories	$ 36	$ 37
Fuel inventory	$ 16	$ 14

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PROPERTY, EQUIPMENT AND DEPRECIATION (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Goodwill		$ 1,934	$ 0
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		30 years
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		25 years
Minor building and land improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		10 years
Computer hardware and software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		5 years
Computer hardware and software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Other furniture and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		10 years
Other furniture and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		5 years
B737 | Aircraft [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years	25 years
B737 | Aircraft [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		25 years
B737 | Aircraft [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		20 years
Airbus [Member] | Aircraft [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		25 years
Airbus [Member] | Aircraft [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		20 years
Q400 [Member] | Aircraft [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life		15 years
Service Life [Member]
Property, Plant and Equipment [Line Items]
Depreciation, decrease		$ 17

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - REVENUE RECOGNITION (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Travel credits for future travel	$ 62	$ 42

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - MILEAGE PLAN (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Mileage Plan [Line Items]
Other accrued liabilities	$ 878	$ 661
Other liabilities	417	362
Deferred revenue	640	431
Deferred revenue from Mileage Plan awards issued but not yet flown	43	37
Passenger revenues	5,006	4,793	$ 4,579
Other-net revenues	817	697	675
Total Operating Revenues	5,931	5,598	5,368
Revenue From Mileage Plan [Member]
Mileage Plan [Line Items]
Passenger revenues	293	267	246
Other-net revenues	429	329	295
Total Operating Revenues	722	596	541
Commission revenue	329	280	$ 261
Liabilities From Mileage Plan [Member]
Mileage Plan [Line Items]
Other accrued liabilities	484	368
Other liabilities	21	19
Deferred revenue	638	427
Liabilities	$ 1,143	$ 814

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SELLING EXPENSES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Advertising expense	$ 61	$ 55	$ 49

XML

GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - STOCK-BASED COMPENSATION (Details)	12 Months Ended
	Dec. 31, 2016
Employee stock purchase plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date	15.00%

XML

ACQUISITION OF VIRGIN AMERICA, INC. (Details) $ in Millions				12 Months Ended
		Dec. 15, 2016 USD ($)	Dec. 14, 2016 USD ($) departures	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Number of Daily Departures | departures			1,200
Revenue				$ 5,931	$ 5,598	$ 5,368
Net Income				814	848	605
Goodwill				1,934	0
Repayments of related party debt		$ 55
Special items—merger-related costs and other				117	32	(30)
Virgin America Inc. [Member]
Business Acquisition [Line Items]
Percentage of interests acquired			100.00%
Revenue				99
Net Income				15
Goodwill			$ 1,934
Intangible assets			143
Finite-lived intangible assets acquired			54
Special items—merger-related costs and other				117
Airport Gates [Member] | Virgin America Inc. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			$ 14
Finite-Lived intangible asset, useful Life			12 years
Customer Relationships [Member] | Virgin America Inc. [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			$ 40
Finite-Lived intangible asset, useful Life			8 years
Airport Slots [Member] | Virgin America Inc. [Member]
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired			$ 89
Special Charges [Member]
Business Acquisition [Line Items]
Revenue	[1]			$ 0	$ 0	$ 0

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjcwOTdhOTM1ODYyYTRmZDE4YWRlNzJjOWQ0M2Q0NzUyfFRleHRTZWxlY3Rpb246NjdDN0U5MTdDNkRFMEZFNjQ2OEEyQzQ3MzZDRDc3MTUM}

XML

ACQUISITION OF VIRGIN AMERICA, INC. Fair value of consideration transferred (Details) - Virgin America Inc. [Member] $ / shares in Units, shares in Thousands, $ in Millions	Dec. 14, 2016 USD ($) $ / shares shares
Business Acquisition [Line Items]
Number of shares of Virgin America common stock issued and outstanding | shares	44,645
Multiplied by cash consideration for each share of common stock per the merger agreement | $ / shares	$ 57.00
Cash consideration paid for common stock issued and outstanding	$ 2,545
Accelerated and vested equity awards attributable to pre-acquisition service	51
Total Purchase Price	$ 2,596

XML

ACQUISITION OF VIRGIN AMERICA, INC. Fair values of the assets acquired and the liabilities assumed (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 14, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill	$ 1,934		$ 0
Virgin America Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents		$ 645
Receivables		44
Prepaid expenses and other current assets		16
Property and equipment		560
Intangible assets		143
Goodwill		1,934
Other assets		84
Total assets		3,426
Accounts payable		22
Accrued wages, vacation and payroll taxes		51
Air traffic liabilities		172
Other accrued liabilities		196
Current portion of long-term debt		125
Long-term debt, net of current portion		360
Deferred income taxes		(304)
Deferred revenue		126
Other liabilities		82
Total liabilities		830
Total purchase price		$ 2,596

XML

ACQUISITION OF VIRGIN AMERICA, INC. Pro forma impact of the acquisition (Details) - Virgin America Inc. [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Revenue	$ 7,511	$ 7,111
Net Income	$ 1,008	$ 914

XML

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]
Cash	$ 283	$ 4
Money Market Funds, at Carrying Value	45	69
Cash equivalents	45	69
Cash and cash equivalents	328	73	$ 107	$ 80
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	1,257	1,260
Marketable securities, Unrealized Gains	2	1
Marketable securities, Unrealized Losses	(7)	(6)
Marketable securities, Fair Value	1,252	1,255
Cash and marketables securities, Cost Basis	1,585	1,333
Cash and marketable securities, Unrealized Gains	2	1
Cash and marketable securities, Unrealized Losses	(7)	(6)
Total cash and marketable securities	1,580	1,328
Available-for-sale Securities, Activity [Abstract]
Proceeds from sales and maturities	962	1,175	1,092
Gross realized gains	3	2	4
Gross realized losses	(1)	(3)	$ (2)
U.S. government and agency securities
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	290	254
Marketable securities, Unrealized Gains	0	0
Marketable securities, Unrealized Losses	(3)	(1)
Marketable securities, Fair Value	287	253
Foreign government bonds
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	36	31
Marketable securities, Unrealized Gains	0	0
Marketable securities, Unrealized Losses	0	0
Marketable securities, Fair Value	36	31
Asset-backed securities
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	138	130
Marketable securities, Unrealized Gains	0	0
Marketable securities, Unrealized Losses	0	0
Marketable securities, Fair Value	138	130
Mortgage-backed securities
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	89	117
Marketable securities, Unrealized Gains	0	0
Marketable securities, Unrealized Losses	0	(1)
Marketable securities, Fair Value	89	116
Corporate notes and bonds
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	693	711
Marketable securities, Unrealized Gains	2	1
Marketable securities, Unrealized Losses	(4)	(4)
Marketable securities, Fair Value	691	708
Municipal securities
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	11	17
Marketable securities, Unrealized Gains	0	0
Marketable securities, Unrealized Losses	0	0
Marketable securities, Fair Value	$ 11	$ 17

XML

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - MATURITIES (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Cost Basis [Abstract]
Due in one year or less	$ 182
Due after one year through five years	1,070
Due after five years through 10 years	5
Due after 10 years	0
Marketable securities, Cost Basis	1,257	$ 1,260
Fair Value [Abstract]
Due in one year or less	182
Due after one year through five years	1,065
Due after five years through 10 years	5
Due after 10 years	0
Marketable securities, Fair Value	$ 1,252	$ 1,255

XML

DERIVATIVE INSTRUMENTS - BALANCE SHEET CLASSIFICATION (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss	$ (305)	$ (303)
Fuel hedge contracts [Member] | Derivative Instruments Not Designated as Hedges [Member] | Fuel Hedge Contracts, Current [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Current	17	2
Fuel hedge contracts [Member] | Derivative Instruments Not Designated as Hedges [Member] | Fuel Hedge Contracts, Noncurrent [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Noncurrent	3	2
Interest rate swaps agreements [Member] | Derivative Instruments Designated as Hedges [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Current	(5)	(5)
Interest rate swaps agreements [Member] | Derivative Instruments Designated as Hedges [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Noncurrent	0	(13)
Interest rate swaps agreements [Member] | Derivative Instruments Designated as Hedges [Member] | Accumulated Other Comprehensive Loss [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss	$ 5	$ 18

XML

DERIVATIVE INSTRUMENTS - INCOME STATEMENT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Gains (losses) recognized in aircraft rent [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss expected to be reclassified	$ 4
Gains (losses) recognized in Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss expected to be reclassified	1
Derivative Instruments Not Designated as Hedges [Member] | Fuel hedge contracts [Member] | Gains (losses) recognized in aircraft fuel expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in income	(3)	$ (19)	$ (18)
Cash Flow Hedging [Member] | Derivative Instruments Designated as Hedges [Member] | Interest rate swaps agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses in accumulated other comprehensive loss	8	(5)	(8)
Cash Flow Hedging [Member] | Derivative Instruments Designated as Hedges [Member] | Interest rate swaps agreements [Member] | Gains (losses) recognized in aircraft rent [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in income	$ (6)	$ (6)	$ (6)

XML

DERIVATIVE INSTRUMENTS - FAIR VALUE OF HEDGE POSITIONS (Details) gallons in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) gallons aircraft agreement	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Derivative [Line Items]
Net cash received (paid) to for new positions and settlements	$ (19)	$ (17)	$ (9)
B737-800 [Member]
Derivative [Line Items]
Capital Leased Assets, Number of B737-800 Aircraft | aircraft	6
Not Designated as Hedging Instrument [Member] | Fuel hedge contracts [Member]
Derivative [Line Items]
Fuel hedge contracts outstanding (in gallons) | gallons	394
Secured Debt [Member] | Interest rate swaps agreements [Member]
Derivative [Line Items]
Number of interest rate swap agreements | agreement	2
Derivative, Notional Amount	$ 295

XML

FAIR VALUE MEASUREMENTS - FAIR VALUE OF ASSETS AND LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	$ 1,252	$ 1,255
Fuel hedge contracts [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments, assets	20	4
Fuel hedge contracts [Member] | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments, assets	0	0
Fuel hedge contracts [Member] | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments, assets	20	4
Interest rate swaps agreements [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments, liabilities	(5)	(18)
Interest rate swaps agreements [Member] | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments, liabilities	0	0
Interest rate swaps agreements [Member] | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments, liabilities	(5)	(18)
U.S. government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	287	253
U.S. government and agency securities | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	287	253
U.S. government and agency securities | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	287
Marketable securities		253
U.S. government and agency securities | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	36	31
Foreign government bonds | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	36	31
Foreign government bonds | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Foreign government bonds | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	36	31
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	138	130
Asset-backed securities | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	138	130
Asset-backed securities | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Asset-backed securities | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	138	130
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	89	116
Mortgage-backed securities | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	89	116
Mortgage-backed securities | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Mortgage-backed securities | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	89	116
Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	691	708
Corporate notes and bonds | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	691	708
Corporate notes and bonds | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Corporate notes and bonds | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	691	708
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	11	17
Municipal securities | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	11	17
Municipal securities | Level 1 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Municipal securities | Level 2 [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 11	$ 17

XML

FAIR VALUE MEASUREMENTS - LONG-TERM DEBT (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,179	$ 520
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,199	$ 557

XML

LONG-TERM DEBT - SCHEDULE OF LONG-TERM DEBT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term Debt	$ 2,964	$ 683
Less debt issuance costs	(18)	(3)
Less current portion	319	114
Long-term debt, net of current portion	$ 2,645	$ 569
Weighted-average fixed-interest rate	4.40%	5.70%
Weighted-average variable-interest rate	2.40%	1.80%
Proceeds from issuance of long-term debt, net of issuance costs	$ 2,044	$ 0	$ 51
Long-term debt payments	249	116	$ 119
Long-term Debt, Fiscal Year Maturity [Abstract]
2017	321
2018	351
2019	424
2020	451
2021	424
Thereafter	1,007
Long-term Debt	2,978
Fixed-rate notes payable due through 2028
Debt Instrument [Line Items]
Long-term Debt	1,179	520
Variable-rate notes payable due through 2028
Debt Instrument [Line Items]
Long-term Debt	$ 1,803	$ 166

XML

LONG-TERM DEBT LONG-TERM DEBT - SECURED DEBT (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) aircraft	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Debt instrument, increase	$ 2,300
Secured debt, number of aircrafts securing debt financing | aircraft	56
Long-term debt payments	$ 249	$ 116	$ 119
Repayments of debt	12
Secured Debt [Member]
Debt Instrument [Line Items]
Proceeds from issuance of secured debt	2,000
Secured Debt [Member] | Secured Debt, Aircraft Collateral [Member]
Debt Instrument [Line Items]
Proceeds from issuance of secured debt	1,600
Secured Debt [Member] | Secured Debt, Aircraft Purchase Agreements [Member]
Debt Instrument [Line Items]
Proceeds from issuance of secured debt	$ 400
Boeing, 737-900ER [Member]
Debt Instrument [Line Items]
Secured debt, number of aircrafts securing debt financing | aircraft	37
B737-800 [Member]
Debt Instrument [Line Items]
Secured debt, number of aircrafts securing debt financing | aircraft	19
Virgin America Inc. [Member]
Debt Instrument [Line Items]
Long-term debt payments	$ 95

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LONG-TERM DEBT - LINE OF CREDIT (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) aircraft credit_facility
Line of Credit Facility [Line Items]
Number of credit facilities | credit_facility	3
Number of credit facilities, no borrowing | credit_facility	2
Credit Facilities 1 and 2 [Member]
Line of Credit Facility [Line Items]
Number of credit facilities | credit_facility	2
Credit Facility 1 [Member]
Line of Credit Facility [Line Items]
Line of credit facility, asset restrictions, unrestricted cash and marketable securities | $	$ 500,000,000
Credit Facility 1 [Member] | Secured by aircraft [Member]
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity | $	$ 100,000,000
Number of credit facilities | credit_facility	1
Credit Facility 2 [Member] | Secured by other [Member]
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity | $	$ 100,000,000
Credit Facility 3 [Member]
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity | $	$ 52,000,000
Number of aircrafts used as collateral | aircraft	2
Credit Facility 3 [Member] | Secured by aircraft [Member]
Line of Credit Facility [Line Items]
Number of credit facilities | credit_facility	1
Secured Debt [Member] | Credit Facility 2 [Member]
Line of Credit Facility [Line Items]
Line of credit facility, borrowing capacity | $	$ 100,000,000

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INCOME TAXES - DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Excess of tax over book depreciation	$ 1,282	$ 1,110
Deferred Tax Liabilities, Intangible Assets	39	0
Other—net	26	23
Gross deferred tax liabilities	1,347	1,133
Mileage Plan	(310)	(208)
Inventory obsolescence	(23)	(22)
Deferred gains	(8)	(8)
Employee benefits	(196)	(167)
Fuel hedge contracts	0	(5)
Acquired net operating losses	(289)	0
Other—net	(62)	(41)
Gross deferred tax assets	(888)	(451)
Valuation allowance	4	0
Net deferred tax liabilities	463	$ 682
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss	773
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 344

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INCOME TAXES - COMPONENTS OF TAX EXPENSE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current tax expense (benefit):
Federal	$ 392	$ 397	$ 229
State	48	30	27
Total current	440	427	256
Deferred tax expense:
Federal	77	60	103
State	14	(23)	11
Total deferred	91	37	114
Total tax expense related to income	$ 531	$ 464	$ 370

XML

INCOME TAXES - EFFECTIVE INCOME TAX RECONCILIATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
U.S. federal tax rate	35.00%	35.00%	35.00%
Income before income tax	$ 1,345	$ 1,312	$ 975
Expected tax expense	471	459	341
Nondeductible expenses	20	4	4
State income taxes	28	19	25
State income sourcing	13	(15)	0
Other—net	(1)	(3)	0
Total tax expense related to income	$ 531	$ 464	$ 370
Effective tax rate	39.50%	35.40%	37.90%
Special tax expense (benefit)	$ 17	$ (26)
Additions based on tax positions and settlements related to the current year	3	$ 19	$ 1
Virgin America Inc. [Member]
Business Acquisition [Line Items]
Nondeductible expenses	$ 39

XML

INCOME TAXES INCOME TAXES - UNCERTAIN TAX POSITIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Beginning balance	$ 22	$ 3	$ 2
Additions based on tax positions and settlements related to the current year	3	19	1
Additions from acquisitions	8	0	0
Ending balance	$ 33	$ 22	$ 3

XML

EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS - ADDITIONAL INFORMATION (Details) - plan	1 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Number of defined benefit plans		4
Number of defined contribution plans		5
Virgin America Inc. [Member]
Business Acquisition [Line Items]
Number of defined contribution plans	6

XML

EMPLOYEE BENEFIT PLANS - ASSUMPTIONS (Details) - Qualified Defined Benefit [Member]	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Net period benefit costs, Weighted-average discount rate		4.20%	4.85%
Net period benefit costs, Weighted-average expected return on assets		6.50%	6.75%
Minimum [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Benefit obligations, Weighted-average discount rate	4.29%	4.55%
Benefit obligations, Rate of compensation increase	2.12%	2.06%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Net period benefit costs, Weighted-average discount rate	4.55%
Net period benefit costs, Weighted-average expected return on assets	6.00%
Net period benefit costs, Rate of compensation increase	2.06%	2.85%	2.90%
Maximum [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Benefit obligations, Weighted-average discount rate	4.50%	4.69%
Benefit obligations, Rate of compensation increase	2.59%	2.65%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Net period benefit costs, Weighted-average discount rate	4.69%
Net period benefit costs, Weighted-average expected return on assets	6.50%
Net period benefit costs, Rate of compensation increase	2.65%	3.91%	3.93%

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EMPLOYEE BENEFIT PLANS - PLAN ASSETS (Details) - Qualified Defined Benefit [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Plan asset allocations	100.00%	100.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Plan Assets	$ 1,846	$ 1,737	$ 1,917
Level 2 [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Plan Assets	$ 1,755	$ 1,652
Equity funds [Member] | U.S.
Defined Benefit Plan Disclosure [Line Items]
Plan asset allocations	30.00%	28.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Equities, Range Minimum	22.00%
Equities, Range Maximum	33.00%
Equity funds [Member] | U.S. | Level 2 [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Plan Assets	$ 545	$ 491
Equity funds [Member] | Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan asset allocations	12.00%	12.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Equities, Range Minimum	9.00%
Equities, Range Maximum	16.00%
Equity funds [Member] | Non-U.S. [Member] | Level 2 [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Plan Assets	$ 218	$ 208
Credit bond index fund [Member] | Level 2 [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Plan Assets	$ 992	$ 953
Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan asset allocations	53.00%	55.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Equities, Range Minimum	48.00%
Equities, Range Maximum	67.00%
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan asset allocations	5.00%	5.00%
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Equities, Range Minimum	0.00%
Equities, Range Maximum	8.00%
Real Estate [Member] | Level 3 [Member]
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Plan Assets	$ 91	$ 85

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EMPLOYEE BENEFIT PLANS - FUNDED STATUS (Details) - Qualified Defined Benefit [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Benefit obligation
Beginning of year	$ 1,898	$ 2,050
Service cost	37	41	$ 33
Interest cost	73	84	81
Plan settlement	0	(62)
Actuarial (gain) loss	104	(140)
Benefits paid	(69)	(75)
End of year	2,043	1,898	2,050
Plan assets at fair value
Beginning of year	1,737	1,917
Actual return on plan assets	178	(43)
Employer contributions	0	0
Plan settlement	0	(62)
Benefits paid	(69)	(75)
End of year	1,846	1,737	$ 1,917
Funded status (unfunded)	$ (197)	$ (161)
Percent funded	90.00%	92.00%
Accumulated benefit obligation	$ 1,900	$ 1,800

XML

EMPLOYEE BENEFIT PLANS - AMOUNTS RECOGNIZED IN CONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Pension and Other Postretirement Defined Benefit Plans, Liabilities [Abstract]
Accrued benefit liability-long term	$ 331	$ 270
Qualified Defined Benefit [Member]
Pension and Other Postretirement Defined Benefit Plans, Liabilities [Abstract]
Accrued benefit liability-long term	225	173
Plan assets-long term (within Other noncurrent assets)	(28)	(12)
Total liability recognized	197	161
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Prior service credit	(10)	(11)
Net loss	509	499
Amount recognized in AOCL (pretax)	$ 499	$ 488

XML

EMPLOYEE BENEFIT PLANS - EXPECTED AMORTIZATION FROM AOCI (Details) - Qualified Defined Benefit [Member] $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	$ 1
Net loss	$ 26

XML

EMPLOYEE BENEFIT PLANS - NET PENSION EXPENSE (Details) - Qualified Defined Benefit [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 37	$ 41	$ 33
Interest cost	73	84	81
Expected return on assets	(108)	(122)	(117)
Amortization of prior service cost	(1)	(1)	(1)
Recognized actuarial loss	25	26	13
Settlement expense (special item)	0	14	0
Net pension expense	26	42	$ 9
Plan settlement	$ 0	$ 62

XML

EMPLOYEE BENEFIT PLANS - FUTURE BENEFITS EXPECTED TO BE PAID (Details) - Qualified Defined Benefit [Member] $ in Millions	Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2017	$ 85
2018	93
2019	96
2020	109
2021	109
2022– 2026	$ 652

XML

EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS - POSTRETIREMENT MEDICAL BENEFITS (Details) - Postretirement Medical Benefits [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation	$ 76	$ 64
Recognized net gain (loss) due to curtailments	25
Recognized net gain (loss) due to curtailments, sick leave subsidy	5
Recognized net gain (loss) due to curtailments, special items	$ 20

XML

EMPLOYEE BENEFIT PLANS - DEFINED CONTRIBUTION PLANS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Total expense for the defined-contribution plans	$ 67	$ 60	$ 54

XML

EMPLOYEE BENEFIT PLANS - PILOT LONG-TERM DISABILITY BENEFITS (Details) - Postretirement Health Coverage [Member] - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Total liability net of a prefunded trust account	$ 25	$ 19
Prefunded trust account	$ 3	$ 2

XML

EMPLOYEE BENEFIT PLANS - EMPLOYEE INCENTIVE-PAY PLANS (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) $ / Quarter	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Variable incentive pay | $	$ 127	$ 120	$ 116
Operational Performance Rewards Program entitles all Air Group employees to maximum quarterly payouts (in dollars per quarter) | $ / Quarter	300

XML

COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) aircraft carriers	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Rent expense	$ 315	$ 295	$ 288
Capacity purchase arrangements, Carriers | carriers	3
Horizon [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Capacity purchase arrangements, Percent	100.00%
Aircraft Commitments [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2017	$ 926
2018	848
2019	694
2020	354
2021	277
Thereafter	361
Total	3,460
Capacity Purchase Agreements[Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2017	76
2018	80
2019	85
2020	90
2021	94
Thereafter	676
Total	1,101
Aircraft Leases [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017	302
2018	316
2019	305
2020	279
2021	242
Thereafter	953
Total	2,397
Facility Leases [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017	123
2018	73
2019	63
2020	57
2021	50
Thereafter	171
Total	$ 537
B-737 [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Commited to purchase (in aircraft) | aircraft	54
Option to purchase additional (in aircraft) | aircraft	41
A-320-Neo [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Option to purchase additional (in aircraft) | aircraft	30
B737-900ER [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Commited to purchase (in aircraft) | aircraft	22
B737 MAX [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Commited to purchase (in aircraft) | aircraft	32
Q400 [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Commited to purchase (in aircraft) | aircraft	33
E-175 [Domain]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Option to purchase additional (in aircraft) | aircraft	30
Property Subject to Operating Lease [Member] | B-737 [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Operating leases, number of leased assets (in aircraft) | aircraft	17
Property Subject to Operating Lease [Member] | Q400 [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Operating leases, number of leased assets (in aircraft) | aircraft	15
Property Subject to Operating Lease [Member] | Airbus [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Operating leases, number of leased assets (in aircraft) | aircraft	53
Property Subject to Operating Lease [Member] | E-175 [Domain]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Operating leases, number of leased assets (in aircraft) | aircraft	15
Property Available for Operating Lease [Member] | A321neo [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Property Subject to or Available for Operating Lease, Number of Optional Additional Units | aircraft	10
Capacity Purchase Agreement with SkyWest [Member] | E175 [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Property Subject to or Available for Operating Lease, Number of Optional Additional Units | aircraft	8
Capacity Purchase Agreement with SkyWest [Member] | Property Available for Operating Lease [Member] | E-175 [Domain]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Property Subject to or Available for Operating Lease, Number of Optional Additional Units | aircraft	5
Aircraft Maintenance Deposits [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Other Commitment, Due after Fifth Year	$ 90
Other Commitment, Due in Fifth Year	63
Other Commitment, Due in Fourth Year	68
Other Commitment, Due in Third Year	65
Other Commitment, Due in Second Year	61
Other Commitment, Due in Next Twelve Months	59
Other Commitment	406
Aircraft Maintenance and Parts Management [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Other Commitment, Due after Fifth Year	0
Other Commitment, Due in Fifth Year	40
Other Commitment, Due in Fourth Year	37
Other Commitment, Due in Third Year	35
Other Commitment, Due in Second Year	32
Other Commitment, Due in Next Twelve Months	30
Other Commitment	$ 174

XML

SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - STOCK CHANGES (Details) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Stock Split [Line Items]
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.01	$ 0.01
prestocksplit [Domain]
Stock Split [Line Items]
Common stock, shares authorized	100,000,000
Common stock, par value	$ 1

XML

SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - DIVIDENDS (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	12 Months Ended
	Feb. 21, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Cash dividend declared per share		$ 0.275	$ 1.10	$ 0.80	$ 0.50
Cash dividend paid			$ 136	$ 102	$ 68
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividend declared per share	$ 0.30
Dividend increase	9.00%

XML

SHAREHOLDER'S EQUITY - COMMON STOCK REPURCHASE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 31, 2015	May 01, 2014
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase (in shares)	2,594,809	7,208,328	7,316,731
Common stock repurchase	$ 193	$ 505	$ 348
2015 $1 billion Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount				$ 1,000
Common stock repurchase (in shares)	2,594,809	1,517,277	0
Common stock repurchase	$ 193	$ 120	$ 0
2014 $650 million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount					$ 650
Common stock repurchase (in shares)	0	5,691,051	5,497,427
Common stock repurchase	$ 0	$ 385	$ 265
2012 $250 million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase (in shares)	0	0	1,819,304
Common stock repurchase	$ 0	$ 0	$ 83

XML

SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - OTHER (Details) - shares	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Treasury Stock, Shares	5,861,583	3,266,774

XML

SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Unrealized gain on marketable securities considered available-for-sale	$ (3)	$ (3)
Related to employee benefit plans	(299)	(288)
Related to interest rate derivatives	(3)	(12)
Accumulated other comprehensive loss	$ (305)	$ (303)

XML

SPECIAL ITEMS SPECIAL ITEMS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Special items—merger-related costs and other	$ 117	$ 32	$ (30)
Nondeductible expenses	20	4	4
Special tax expense (benefit)	17	(26)
Special Item, net of tax			20
Gain related to litigation settlement			10
Pension Plan [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Settlement expense (special item)	0	$ 14	$ 0
Virgin America Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Special items—merger-related costs and other	117
Nondeductible expenses	$ 39

XML

STOCK-BASED COMPENSATION PLANS (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 19	$ 17	$ 16
Tax benefit related to stock-based compensation	7	7	6
Unrecognized stock-based compensation for non-vested options and awards	$ 23
Unrecognized stock-based compensation awards weighted-average period	10 months 24 days
Shares authorized under stock-based compensation plans (in shares)	17,000,000
Shares remaining available for future grants (shares)	11,847,713
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 2	$ 2	$ 3
Unrecognized stock-based compensation for non-vested options and awards	$ 2
Unrecognized stock-based compensation awards weighted-average period	1 year 1 month 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility	51.00%	53.00%	65.00%
Expected term	6 years	6 years	6 years
Risk-free interest rate	1.23%	1.67%	1.87%
Expected dividend yield	1.50%	1.25%	1.25%
Weighted-average grant date fair value per share (in dollars per share)	$ 27.14	$ 28.71	$ 21.70
Estimated fair value of options granted (millions)	$ 2	$ 3	$ 3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)	540,345
Granted (in Shares)	79,340
Exercised (in shares)	(158,758)
Canceled (in shares)	0
Forfeited or expired (in shares)	(7,253)
Outstanding, ending balance (in shares)	453,674	540,345
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, beginning balance, Weighted-Average Exercise Price Per Share (in dollars per share)	$ 31.58
Granted, Weighted-Average Exercise Price Per Share (in dollars per share)	65.63
Exercised, Weighted-Average Exercise Price Per Share (in dollars per share)	23.62
Canceled, Weighted-Average Exercise Price Per Share (in dollars per share)	0.00
Fofeited or expired, Weighted-Average Exercise Price Per Share (in dollars per share)	49.66
Outstanding, ending balance, Weighted-Average Exercise Price Per Share (in dollars per share)	$ 40.02	$ 31.58
Outstanding, Weighted-Average Contractual Life	6 years 2 months 12 days	6 years 3 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 22	$ 26
Exercisable, Outstanding (in shares)	199,676
Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share)	$ 25.35
Exercisable, Weighted-Average Contractual Life	5 years 1 month 6 days
Exercisable, Aggregate Intrinsic Value	$ 13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Vested or expected to vest, Shares	453,435
Vested or expected to vest, Weighted-Average Exercise Price Per Share (in dollars per share)	$ 40.03
Vested or expected to vest, Weighted-Average Contractual Life	6 years 2 months 12 days
Vested or expected to vest, Aggregate Intrinsic Value	$ 22
Intrinsic value of option exercises	9	14	20
Cash received from stock option exercises	3	4	6
Tax benefit related to stock option exercises	3	5	7
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	3	3	2
Stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	11	$ 11	10
Unrecognized stock-based compensation for non-vested options and awards	$ 21
Unrecognized stock-based compensation awards weighted-average period	10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested, beginning balance (in shares)	470,715
Granted (in shares)	374,863
Vested (in shares)	(366,319)
Forfeited (in shares)	(39,166)
Non-vested, ending balance (in shares)	440,093	470,715
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Non-vested, beginning balance, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 38.09
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	63.53
Vested, Weighted-Average Grant Date Fair Value (in dollars per share)	32.87
Forfeited, Weighted-Average Grant Date Fair Value (in dollars per share)	40.35
Non-vested, ending balance, Weighted-Average Price Per Share (in dollars per share)	$ 63.86	$ 38.09
Non-vested, Weighted-Average Contractual Life	1 year 4 months 24 days	9 months 18 days
Non-vested, Total Instrinsic Value (in dollars)	$ 39	$ 38
Deferred stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	1	1	1
Employee stock purchase plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 5	$ 3	$ 2
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)	308,920	281,058	298,283
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate	10.00%

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OPERATING SEGMENT INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Operating revenues
Passenger, Mainline		$ 4,098	$ 3,939		$ 3,774
Passenger, Regional		908	854		805
Total passenger revenue		5,006	4,793		4,579
CPA revenues		0	0		0
Freight and mail		108	108		114
Other Net and Special Revenue		817	697		675
Total Operating Revenues		5,931	5,598		5,368
Operating expenses
Operating expenses, excluding fuel		3,751	3,346		2,988
Special items—merger-related costs and other		117	32		(30)
Economic fuel		831	954		1,418
Total Operating Expenses		4,582	4,300		4,406
Nonoperating Income (Expense)
Interest income		27	21		21
Interest expense		(55)	(42)		(48)
Other		24	35		40
Nonoperating Income (Expense) Total		(4)	14		13
Income (loss) before income tax		1,345	1,312		975
Depreciation		363	320		294
Capital expenditures		678	831		694
Total assets		9,962	6,530
Air Group Adjusted [Member]
Operating revenues
Passenger, Mainline	[1]	4,098	3,939		3,774
Passenger, Regional	[1]	908	854		805
Total passenger revenue	[1]	5,006	4,793		4,579
CPA revenues	[1]	0	0		0
Freight and mail	[1]	108	108		114
Other Net and Special Revenue	[1]	817	697		675
Total Operating Revenues	[1]	5,931	5,598		5,368
Operating expenses
Operating expenses, excluding fuel	[1]	3,634	3,314		3,018
Economic fuel	[1]	844	954		1,441
Total Operating Expenses	[1]	4,478	4,268		4,459
Nonoperating Income (Expense)
Interest income	[1]	27	21		21
Interest expense	[1]	(55)	(42)		(48)
Other	[1]	24	35		40
Nonoperating Income (Expense) Total	[1]	(4)	14		13
Income (loss) before income tax	[1]	1,449	1,344		922
Alaska Airlines [Member]
Nonoperating Income (Expense)
Depreciation	[2]	296	268		243
Capital expenditures	[2]	608	821		659
Total assets	[2]	15,260	8,127
Alaska Mainline [Member]
Operating revenues
Passenger, Mainline		4,098	3,939		3,774
Passenger, Regional		0	0		0
Total passenger revenue		4,098	3,939		3,774
CPA revenues		0	0		0
Freight and mail		104	103		109
Other Net and Special Revenue		738	621		592
Total Operating Revenues		4,940	4,663		4,475
Operating expenses
Operating expenses, excluding fuel		2,883	2,653		2,417
Economic fuel		719	823		1,251
Total Operating Expenses		3,602	3,476		3,668
Nonoperating Income (Expense)
Interest income		26	19		20
Interest expense		(42)	(28)		(32)
Other		19	28		39
Nonoperating Income (Expense) Total		3	19		27
Income (loss) before income tax		1,341	1,206		834
Alaska Regional [Member]
Operating revenues
Passenger, Mainline		0	0		0
Passenger, Regional		908	854		805
Total passenger revenue		908	854		805
CPA revenues		0	0		0
Freight and mail		5	5		5
Other Net and Special Revenue		74	72		78
Total Operating Revenues		987	931		888
Operating expenses
Operating expenses, excluding fuel		769	695		623
Economic fuel		125	131		190
Total Operating Expenses		894	826		813
Nonoperating Income (Expense)
Interest income		0	0		0
Interest expense		0	0		0
Other		0	0		(1)
Nonoperating Income (Expense) Total		0	0		(1)
Income (loss) before income tax		93	105		74
Horizon [Member]
Operating revenues
Passenger, Mainline		0	0		0
Passenger, Regional		0	0		0
Total passenger revenue		0	0		0
CPA revenues		424	408		371
Freight and mail		0	0		0
Other Net and Special Revenue		4	4		5
Total Operating Revenues		428	412		376
Operating expenses
Operating expenses, excluding fuel		407	375		349
Economic fuel		0	0		0
Total Operating Expenses		407	375		349
Nonoperating Income (Expense)
Interest income		1	0		0
Interest expense		(9)	(10)		(12)
Other		1	1		2
Nonoperating Income (Expense) Total		(7)	(9)		(10)
Income (loss) before income tax		14	28		17
Depreciation		67	52		51
Capital expenditures		70	10		35
Total assets		690	717
Parent [Member]
Nonoperating Income (Expense)
Total assets		(5,988)	(2,314)
Intersegment Eliminations
Operating revenues
Passenger, Mainline		0	0		0
Passenger, Regional		0	0		0
Total passenger revenue		0	0		0
CPA revenues		(424)	(408)		(371)
Freight and mail		(1)	0		0
Other Net and Special Revenue		1	0		0
Total Operating Revenues		(424)	(408)		(371)
Operating expenses
Operating expenses, excluding fuel		(425)	(409)		(371)
Economic fuel		0	0		0
Total Operating Expenses		(425)	(409)		(371)
Nonoperating Income (Expense)
Interest income		0	2		1
Interest expense		(4)	(4)		(4)
Other		4	6		0
Nonoperating Income (Expense) Total		0	4		(3)
Income (loss) before income tax		1	5		(3)
Special Charges [Member]
Operating revenues
Passenger, Mainline	[3]	0	0		0
Passenger, Regional	[3]	0	0		0
Total passenger revenue	[3]	0	0		0
CPA revenues	[3]	0	0		0
Freight and mail	[3]	0	0		0
Other Net and Special Revenue	[3]	0	0		0
Total Operating Revenues	[3]	0	0		0
Operating expenses
Operating expenses, excluding fuel		117	32	[3]	(30)	[3]
Economic fuel		(13)	0	[3]	(23)	[3]
Total Operating Expenses	[3]	104	32		(53)
Nonoperating Income (Expense)
Interest income	[3]	0	0		0
Interest expense	[3]	0	0		0
Other	[3]	0	0		0
Nonoperating Income (Expense) Total	[3]	0	0		0
Income (loss) before income tax	[3]	$ (104)	$ (32)		$ 53

[1] Year Ended December 31, 2014Mainline Regional Horizon Consolidating & Other(b) Air Group Adjusted(c) Special Items(d) ConsolidatedOperating revenues Passenger Mainline$3,774 $— $— $— $3,774 $— $3,774Regional— 805 — — 805 — 805Total passenger revenues3,774 805 — — 4,579 — 4,579CPA revenues— — 371 (371) — — —Freight and mail109 5 — — 114 — 114Other-net592 78 5 — 675 — 675Total operating revenues4,475 888 376 (371) 5,368 — 5,368 Operating expenses Operating expenses, excluding fuel2,417 623 349 (371) 3,018 (30) 2,988Fuel expense1,251 190 — — 1,441 (23) 1,418Total operating expenses3,668 813 349 (371) 4,459 (53) 4,406 Nonoperating income (expense) Interest income20 — — 1 21 — 21Interest expense(32) — (12) (4) (48) — (48)Other39 (1) 2 — 40 — 40 27 (1) (10) (3) 13 — 13Income (loss) before income tax$834 $74 $17 $(3) $922 $53 $975

[2] 2016 2015 2014Depreciation and amortization: Mainline$296 $268 $243Horizon67 52 51Consolidated$363 $320 $294 Capital expenditures: Mainline$608 $821 $659Horizon70 10 35Consolidated$678 $831 $694 Total assets at end of period: Mainline$15,260 $8,127 Horizon690 717 Consolidating & Other(5,988) (2,314) Consolidated$9,962 $6,530

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