10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________________________________________________________________

Form 10-Q

_______________________________________________________________________

(Mark One)

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

For the quarterly period ended June 30, 2014

OR

o 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: 001-35186

_______________________________________________________________________

SPIRIT AIRLINES, INC.

(Exact name of registrant as specified in its charter)

_______________________________________________________________________

Delaware	38-1747023
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
2800 Executive Way Miramar, Florida	33025
(Address of principal executive offices)	(Zip Code)

(954) 447-7920

(Registrant’s telephone number, including area code)

_______________________________________________________________________

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.    Yes  ý  No  o

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 (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  o

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 the definitions of “large accelerated filer,” “accelerated filer” and “small reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	ý	Accelerated filer	o
Non-accelerated filer	o	Smaller reporting company	o

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

Indicate the number of shares outstanding of each of the registrant’s classes of common stock as of the close of business on July 21, 2014:

Class	Number of Shares
Common Stock, $0.0001 par value	72,746,694

Table of Contents

INDEX

			Page No.
Part I. Financial Information
	Item 1.	Financial Statements (unaudited)	1
		Condensed Statements of Operations - Three and Six Months Ended June 30, 2014 and 2013	1
		Condensed Balance Sheets – June 30, 2014 and December 31, 2013	2
		Condensed Statements of Cash Flows – Six Months Ended June 30, 2014 and 2013	3
		Notes to Condensed Financial Statements	4
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	13
		Glossary of Airline Terms	25
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	27
	Item 4.	Controls and Procedures	27
Part II. Other Information
	Item 1.	Legal Proceedings	28
	Item 1A.	Risk Factors	28
	Item 6.	Exhibits	29
Signature			30

PART I. Financial Information

ITEM 1. UNAUDITED CONDENSED FINANCIAL STATEMENTS

Spirit Airlines, Inc.

Condensed Statements of Operations

(unaudited, in thousands, except per share data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Operating revenues:
Passenger	$	302,487		$	241,119		$	556,365		$	460,016
Non-ticket	196,850			166,220			380,959			317,760
Total operating revenues	499,337			407,339			937,324			777,776
Operating expenses:
Aircraft fuel	154,852			135,251			303,323			266,917
Salaries, wages and benefits	77,440			64,456			153,689			125,953
Aircraft rent	48,222			41,915			94,609			82,987
Landing fees and other rents	25,831			21,346			49,847			39,402
Distribution	20,159			17,277			38,728			32,958
Maintenance, materials and repairs	19,205			15,202			36,819			26,982
Depreciation and amortization	11,344			7,604			22,465			13,928
Other operating	36,408			37,416			71,856			71,915
Loss on disposal of assets	715			91			865			261
Special charges (credits)	17			23			26			46
Total operating expenses	394,193			340,581			772,227			661,349
Operating income	105,144			66,758			165,097			116,427
Other (income) expense:
Interest expense	103			95			210			104
Capitalized interest	(103		)	(95		)	(210		)	(104		)
Interest income	(83		)	(105		)	(151		)	(221		)
Other expense	1,439			36			1,476			137
Total other (income) expense	1,356			(69		)	1,325			(84		)
Income before income taxes	103,788			66,827			163,772			116,511
Provision for income taxes	38,939			24,759			61,217			43,889
Net income	$	64,849		$	42,068		$	102,555		$	72,622
Basic earnings per share	$	0.89		$	0.58		$	1.41		$	1.00
Diluted earnings per share	$	0.88		$	0.58		$	1.40		$	1.00

The accompanying Notes are an integral part of these Condensed Financial Statements.

1

Spirit Airlines, Inc.

Condensed Balance Sheets

(unaudited, in thousands)

	June 30, 2014			December 31, 2013
Assets
Current assets:
Cash and cash equivalents	$	567,239		$	530,631
Accounts receivable, net	37,467			23,246
Deferred income taxes	15,166			16,243
Prepaid expenses and other current assets	68,589			78,955
Total current assets	688,461			649,075
Property and equipment:
Flight equipment	12,397			9,847
Ground and other equipment	55,112			50,987
Less accumulated depreciation	(29,516		)	(25,221		)
	37,993			35,613
Deposits on flight equipment purchase contracts	248,770			157,669
Aircraft maintenance deposits	185,699			161,484
Deferred heavy maintenance, net	129,021			125,288
Other long-term assets	59,906			51,636
Total assets	$	1,349,850		$	1,180,765
Liabilities and shareholders’ equity
Current liabilities:
Accounts payable	$	21,842		$	23,104
Air traffic liability	232,072			167,627
Other current liabilities	146,624			145,262
Total current liabilities	400,538			335,993
Long-term deferred income taxes	47,443			48,916
Deferred credits and other long-term liabilities	26,258			26,739
Shareholders’ equity:
Common stock	7			7
Additional paid-in-capital	520,492			515,331
Treasury stock	(3,513		)	(2,291		)
Retained earnings	358,625			256,070
Total shareholders’ equity	875,611			769,117
Total liabilities and shareholders’ equity	$	1,349,850		$	1,180,765

The accompanying Notes are an integral part of these Condensed Financial Statements.

2

Spirit Airlines, Inc.

Condensed Statements of Cash Flows

(unaudited, in thousands)

	Six Months Ended June 30,
	2014			2013
Operating activities:
Net income	$	102,555		$	72,622
Adjustments to reconcile net income to net cash provided by operations:
Unrealized (gains) losses on open fuel hedge contracts	—			9,144
Equity-based compensation, net	3,872			2,788
Allowance for doubtful accounts	(33		)	156
Amortization of deferred gains and losses	(178		)	(324		)
Depreciation and amortization	22,465			13,928
Deferred income tax	(395		)	5,962
Loss on disposal of assets	865			261
Capitalized interest	(210		)	(104		)
Changes in operating assets and liabilities:
Accounts receivable	(14,188		)	(10,223		)
Prepaid maintenance reserves	(14,286		)	(16,641		)
Long-term deposits and other assets	(27,020		)	(36,304		)
Accounts payable	(1,462		)	(991		)
Air traffic liability	64,331			74,374
Other liabilities	7,819			19,612
Net cash provided by operating activities	144,135			134,260
Investing activities:
Pre-delivery deposits for flight equipment, net of refunds	(94,009		)	(19,748		)
Purchase of property and equipment	(7,430		)	(13,816		)
Net cash used in investing activities	(101,439		)	(33,564		)
Financing activities:
Proceeds from options exercised	63			555
Payments on capital lease obligations	(511		)	—
Proceeds from sale and leaseback transactions	—			6,900
Payments to pre-IPO shareholders pursuant to tax receivable agreement	(5,643		)	—
Excess tax benefits from equity-based compensation	1,225			875
Repurchase of common stock	(1,222		)	(937		)
Net cash (used in) provided by financing activities	(6,088		)	7,393
Net increase in cash and cash equivalents	36,608			108,089
Cash and cash equivalents at beginning of period	530,631			416,816
Cash and cash equivalents at end of period	$	567,239		$	524,905
Supplemental disclosures
Cash payments for:
Interest	$	326		$	17
Taxes	$	52,093		$	44,806

The accompanying Notes are an integral part of these Condensed Financial Statements.

3

Notes to Condensed Financial Statements

(unaudited)

1. Basis of Presentation

The accompanying unaudited condensed financial statements include the accounts of Spirit Airlines, Inc. (the Company). These unaudited condensed financial statements reflect all normal recurring adjustments which management believes are necessary to present fairly the financial position, results of operations and cash flows of the Company for the respective periods presented. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission for Form 10-Q. These unaudited interim condensed financial statements should be read in conjunction with the audited financial statements of the Company and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2013 filed with the Securities and Exchange Commission.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

The interim results reflected in the unaudited condensed financial statements are not necessarily indicative of the results that may be expected for other interim periods or for the full year.

2. Recent Accounting Developments

In May 2014, the Financial Accounting Standards Board (the FASB) issued Accounting Standards Update (ASU) No. 2014-09, (ASU 2014-09), "Revenue from Contracts with Customers." The objective of ASU 2014-19 is to establish a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and will supersede most of the existing revenue recognition guidance, including industry-specific guidance. The core principle of ASU 2014-09 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the new guidance, an entity will (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the contract's performance obligations; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. The new guidance is effective for annual reporting periods (including interim periods within those periods) beginning after December 15, 2016 for public companies. Early adoption is not permitted. Entities have the option of using either a full retrospective or modified approach to adopt ASU 2014-09. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements nor decided upon the method of adoption.

4

Notes to Condensed Financial Statements—(Continued)

3. Earnings per Share

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands, except per share amounts)
Numerator
Net income	$	64,849	$	42,068	$	102,555	$	72,622
Denominator
Weighted-average shares outstanding, basic	72,740		72,593		72,712		72,540
Effect of dilutive stock awards	554		399		562		358
Adjusted weighted-average shares outstanding, diluted	73,294		72,992		73,274		72,898
Net Income per Share
Basic earnings per common share	$	0.89	$	0.58	$	1.41	$	1.00
Diluted earnings per common share	$	0.88	$	0.58	$	1.40	$	1.00
Anti-dilutive weighted-average shares	57		2		56		1

4. Accrued Liabilities

Other current liabilities as of June 30, 2014 and December 31, 2013 consist of the following:

	June 30, 2014		December 31, 2013
	(in thousands)
Federal excise and other passenger taxes and fees payable	$	36,006	$	26,979
Salaries and wages	28,640		26,174
Aircraft maintenance	23,322		36,165
Airport expenses	17,322		17,109
Fuel	11,037		13,819
Federal and state income tax payable	9,091		794
Aircraft and facility rent	8,605		7,993
Other	12,601		16,229
Other current liabilities	$	146,624	$	145,262

5. Financial Instruments and Risk Management

As part of the Company’s risk management program, the Company from time to time uses a variety of financial instruments to reduce its exposure to fluctuations in the price of jet fuel. The Company does not hold or issue derivative financial instruments for trading purposes.

The Company is exposed to credit losses in the event of nonperformance by counterparties to these financial instruments. The Company periodically reviews and seeks to mitigate exposure to the financial deterioration and nonperformance of any counterparty by monitoring the absolute exposure levels, each counterparty's credit ratings, and the historical performance of the counterparties relating to derivative transactions. The credit exposure related to these financial instruments is limited to the fair value of contracts in a net receivable position at the reporting date. The Company also maintains security agreements that require the Company to post collateral if the value of selected instruments falls below specified mark-to-market thresholds. As of June 30, 2014, the Company was not required to post collateral for these instruments.

The Company records financial derivative instruments at fair value, which includes an evaluation of each counterparty's credit risk. The Company's derivative contracts generally consist of United States Gulf Coast jet fuel swaps (jet fuel swaps) and United States Gulf Coast jet fuel options (jet fuel options). Both jet fuel swaps and jet fuel options are used at times to protect

5

Notes to Condensed Financial Statements—(Continued)

the refining price risk between the price of crude oil and the price of refined jet fuel, and to manage the risk of increasing fuel prices. Fair value of the instruments is determined using standard option valuation models.

The Company did not elect hedge accounting on any derivative instruments entered into during the three and six months ended June 30, 2014 and 2013 and, as a result, changes in the fair value of these fuel derivative contracts are recorded in aircraft fuel expense. Premiums paid or received for fuel options are recognized in earnings within aircraft fuel expense as the fair value of the time value portion of each option changes.

The following table summarizes the components of aircraft fuel expense for the three and six months ended June 30, 2014 and 2013:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands)
Into-plane fuel cost	$	154,385	$	129,375	$	302,856	$	258,088
Settlement losses (gains)	—		113		—		(315		)
Unrealized mark-to-market losses (gains)	—		5,763		—		9,144
Premium expense recognized related to fuel option contracts	467		—		467		—
Aircraft fuel	$	154,852	$	135,251	$	303,323	$	266,917

Premiums and settlements received or paid on fuel derivative contracts are reflected in the accompanying statements of cash flows in net cash provided by operating activities.

Historically, during peak hurricane season (August through October), the Company has entered into jet fuel derivative contracts to protect the refining price risk between the price of crude oil and the price of refined jet fuel. As of June 30, 2014, the Company had fuel derivatives consisting of jet fuel options with refined products as the underlying commodities designed to protect 52.5 million gallons, or approximately 50.1%, of its remaining 2014 anticipated jet fuel consumption at a weighted-average ceiling price of $3.25 per gallon. As of December 31, 2013, the Company had no outstanding fuel derivatives in place.

6. Commitments and Contingencies

Aircraft-Related Commitments and Financing Arrangements

The Company’s contractual purchase commitments consist primarily of aircraft and engine acquisitions through manufacturers and aircraft leasing companies. As of June 30, 2014, the Company's aircraft orders consisted of the following:

	Airbus				Third-Party Lessor
	A320	A320NEO	A321	A321NEO	A320NEO	Total
remainder of 2014	8					8
2015	8		6		1	15
2016	3		9		4	16
2017	8		10			18
2018	2	6	5			13
2019		3		10		13
2020		13				13
2021		18				18
	29	40	30	10	5	114

The Company also has six spare engine orders for V2500 SelectOneengines with International Aero Engines (IAE) and nine spare engine orders for PurePower PW1100G-JM engines with Pratt & Whitney. Spare engines are scheduled for delivery from 2014 through 2024. Purchase commitments for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and pre-delivery payments, will be approximately $350 million for the remainder of 2014, $658 million in 2015, $601 million in 2016, $757 million in 2017, $615 million in 2018, and $2,207 million in 2019 and

6

Notes to Condensed Financial Statements—(Continued)

beyond. The Company has secured financing commitments with third parties for four aircraft deliveries from Airbus, scheduled for delivery in 2014. The Company does not have financing commitments in place for the remaining 105 Airbus aircraft currently on firm order scheduled for delivery between the fourth quarter of 2014 through 2021. However, the Company has signed letters of intent to finance the remaining 4 aircraft being delivered in 2014 and the first 11 aircraft being delivered in 2015 under secured debt arrangements.

During the first six months of 2014, the Company took delivery of three aircraft which were financed via sale and leaseback transactions with third-party aircraft lessors. The three sale and leaseback transactions resulted in net deferred losses of $1.0 million. Deferred losses are included in other long-term assets on the accompanying balance sheet. Deferred losses are recognized as an increase to rent expense on a straight-line basis over the term of the respective operating leases. Deferred gains are included in deferred credits and other long-term liabilities on the accompanying balance sheet. Deferred gains are recognized as a decrease to rent expense on a straight-line basis over the term of the respective operating leases. The Company had agreements in place prior to the delivery of these aircraft which resulted in the settlement of the purchase obligation by the lessor and the refund of $16.0 million in pre-delivery deposits from Airbus during the six months ended June 30, 2014. The refunded pre-delivery deposits have been disclosed in the accompanying statements of cash flows as pre-delivery deposits for flight equipment, net of refunds, within investing activities. All leases from these sale and leaseback transactions were accounted for as operating leases. Under the terms of the lease agreements, the Company will continue to operate and maintain the aircraft. Payments under the lease agreements are fixed for the term of the lease. The lease agreements contain standard termination events, including termination upon a breach of the Company's obligations to make rental payments and upon any other material breach of the Company's obligations under the leases, and standard maintenance and return condition provisions. These return provisions are evaluated at inception of the lease and throughout the lease terms and are accounted for as additional rent expense when it is probable that such amounts will be incurred. Upon a termination of the lease due to a breach by the Company, the Company would be liable for standard contractual damages, possibly including damages suffered by the lessor in connection with remarketing the aircraft or while the aircraft is not leased to another party. During the fourth quarter of 2013, the Company entered into an agreement for the lease of two quick engine change kits, classified as capital leases. Payments under the lease agreement are fixed for the three year term of the lease.

Future minimum lease payments under capital leases and noncancellable operating leases with initial or remaining terms in excess of one year at June 30, 2014 were as follows:

			Operating Leases
	Capital Leases		Aircraft and Spare Engine Leases		Property Facility Leases		Operating Lease Obligations
	(in thousands)
remainder of 2014	$	923	$	98,287	$	10,272	$	108,559
2015	1,244		197,137		17,256		214,393
2016	1,044		195,312		11,359		206,671
2017	44		178,811		8,832		187,643
2018	44		155,123		6,445		161,568
2019 and thereafter	12		603,289		24,406		627,695
Total minimum lease payments	$	3,311	$	1,427,959	$	78,570	$	1,506,529
Less amount representing interest	$	324
Present value of minimum lease payments	$	2,987
Less current portion	$	1,324
Long term portion	$	1,663

Aircraft rent expense consists of monthly lease rents for aircraft and spare engines under the terms of the related operating leases and is recognized on a straight-line basis. Aircraft rent expense also includes supplemental rent. Supplemental rent is made up of maintenance reserves paid or to be paid to aircraft lessors in advance of the performance of major maintenance activities that are not probable of being reimbursed, and lease return condition obligations which the Company begins to accrue when they are probable and can be estimated. The Company expects supplemental rent to increase as individual aircraft lease agreements approach their respective termination dates and the Company begins to accrue the estimated cost of return conditions for the corresponding aircraft.

7

Notes to Condensed Financial Statements—(Continued)

Some of the Company’s master lease agreements provide that the Company pays maintenance reserves to aircraft lessors to be held as collateral in advance of the Company’s required performance of major maintenance activities. Maintenance reserve payments are either contractually fixed or utilization based amounts. Fixed maintenance reserve payments for these aircraft and related flight equipment, including estimated amounts for contractual price escalations, will be approximately $3.7 million for the remainder of 2014, $7.6 million in 2015, $8.0 million in 2016, $7.4 million in 2017, $5.8 million in 2018, and $18.4 million in 2019 and beyond. These lease agreements provide that maintenance reserves are reimbursable to the Company upon completion of the maintenance event in an amount equal to the lesser of (1) the amount of the maintenance reserve held by the lessor associated with the specific maintenance event or (2) the qualifying costs related to the specific maintenance event.

On October 15, 2013, the Company had an aircraft experience an engine failure shortly after takeoff. The aircraft immediately returned to the airport, and the passengers and crew safely disembarked from the aircraft. The airframe and engine incurred damage as a result of the failure. In 2013, the Company expensed the insurance deductible related to this incident of approximately $0.8 million. The Company anticipates it will recover insurance proceeds to cover the expenses related to this incident.

Other

The Company is contractually obligated to pay the following minimum guaranteed payments for its reservation system and advertising media as of June 30, 2014: $1.9 million for the remainder of 2014, $3.9 million in 2015, $3.9 million in 2016, $3.9 million in 2017, $2.6 million in 2018, and none in 2019 and thereafter.

Litigation

The Company is subject to commercial litigation claims and to administrative and regulatory proceedings and reviews that may be asserted or maintained from time to time. The Company believes the ultimate outcome of such lawsuits, proceedings and reviews will not, individually or in the aggregate, have a material adverse effect on its financial position, liquidity or results of operations.

Credit Card Processing Arrangements

The Company has agreements with organizations that process credit card transactions arising from the purchase of air travel, baggage charges, and other ancillary services by customers. As it is standard in the airline industry, the Company's contractual arrangements with credit card processors permit them, under certain circumstances, to retain a holdback or other collateral, which the Company records as restricted cash, when future air travel and other future services are purchased via credit card transactions. The required holdback is the percentage of the Company's overall credit card sales its credit card processors hold to cover refunds to customers if the Company fails to fulfill its flight obligations. If the Company fails to satisfy certain liquidity and other financial covenants, the processing agreements provide the processors the right to require the Company to maintain cash collateral up to approximately 100% of the Company's air traffic liability, which would result in a commensurate reduction of unrestricted cash. As of June 30, 2014 and December 31, 2013, the Company continued to be in compliance with its credit card processing agreements and liquidity and other financial covenant requirements, and the processors were holding back no remittances.

The maximum potential exposure to cash holdbacks by the Company's credit card processors, based upon advance ticket sales and $9 Fare Club memberships as of June 30, 2014 and December 31, 2013, was $265.5 million and $188.6 million, respectively.

Employees

Approximately 59% of the Company’s employees are covered under collective bargaining agreements. The table below sets forth the Company's employee groups and status of the collective bargaining agreements as of June 30, 2014.

Employee Groups	Representative	Amendable Date	Percentage of Workforce
Pilots	Air Line Pilots Association, International (ALPA)	August 2015	24%
Flight Attendants	Association of Flight Attendants (AFA-CWA)	August 2007	34%
Dispatchers	Transport Workers Union (TWU)	August 2018	1%

In December 2013, with the help of the National Mediation Board (NMB), the Company reached a tentative agreement for a five-year contract with the Company's flight attendants. The tentative agreement was subject to ratification by the flight

8

Notes to Condensed Financial Statements—(Continued)

attendant membership. On February 7, 2014, the Company was notified that the flight attendants voted not to ratify the tentative agreement. The Company will continue to work together with the AFA and the NMB with a goal of reaching a mutually beneficial agreement. On July 8, 2014, ramp service agents directly employed by the Company voted to be represented by the International Association of Machinists and Aerospace Workers (IAM). These ramp service agents currently serve 4 of the 55 airports where the Company operates. The Company is in discussions to begin the process of negotiations with the IAM.

The Company is self-insured for health care claims, up to a stop loss amount for eligible participating employees, and qualified dependent medical claims, subject to deductibles and limitations. The Company’s liabilities for claims incurred but not reported are determined based on an estimate of the ultimate aggregate liability for claims incurred. The estimate is calculated from actual claim rates and adjusted periodically as necessary. The Company has accrued $2.2 million and $2.1 million in health care claims as of June 30, 2014 and December 31, 2013, respectively.

7. Fair Value Measurements

Under ASC 820, Fair Value Measurements and Disclosures, disclosures are required about how fair value is determined for assets and liabilities, and a hierarchy for which these assets and liabilities must be grouped is established, based on significant levels of inputs, as follows:

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.

Fair value is defined 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 Company utilizes several valuation techniques in order to assess the fair value of the Company’s financial assets and liabilities. The Company's derivative contracts generally consist of jet fuel swaps and jet fuel options. These instruments are valued using energy and commodity market data, which is derived by combining raw inputs with quantitative models and processes to generate forward curves and volatilities.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

Assets and liabilities measured at gross fair value on a recurring basis are summarized below:

	Fair Value Measurements as of June 30, 2014
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	567.2	$	567.2	$	—	$	—
Jet fuel options	0.4		—		—		0.4
Total assets	$	567.6	$	567.2	$	—	$	0.4
Total liabilities	$	—	$	—	$	—	$	—

9

Notes to Condensed Financial Statements—(Continued)

	Fair Value Measurements as of December 31, 2013
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	530.6	$	530.6	$	—	$	—
Total assets	$	530.6	$	530.6	$	—	$	—
Total liabilities	$	—	$	—	$	—	$	—

Cash and cash equivalents at June 30, 2014 and December 31, 2013 are comprised of liquid money market funds and cash and are categorized as Level 1 instruments. The Company maintains cash with various high-quality financial institutions. The Company had no transfers of assets or liabilities between any of the above levels during the six months ended June 30, 2014 and the year endedDecember 31, 2013.

The Company did not elect hedge accounting on any of the derivative instruments, and as a result, changes in the fair values of these fuel derivative contracts are recorded each period in fuel expense. Fair value of the instruments is determined using standard option valuation models. The Company also considers counterparty risk and its own credit risk in its determination of all estimated fair values. Within the Condensed Balance Sheets, the Company offsets fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. All derivative instruments are presented on a gross basis in the table above.

The Company determines the fair value of jet fuel options utilizing an option pricing model based on inputs that are either readily available in public markets or can be derived from information available in publicly quoted markets. The Company has consistently applied these valuation techniques in all periods presented and believes it has obtained the most accurate information available for the types of derivative contracts it holds.

The fair value of the Company's jet fuel swaps are determined based on inputs that are readily available in public markets or can be derived from information available in publicly quoted markets; therefore, the Company has categorized these instruments as Level 2. Due to the fact that certain inputs utilized to determine the fair value of the Company's jet fuel options are unobservable (principally implied volatility), the Company has categorized these instruments as Level 3.

The Company records the fair value adjustment of its aircraft fuel derivatives in the accompanying statement of operations within aircraft fuel and on the balance sheet within other current assets or other current liabilities, depending on whether the net fair value of the derivatives is in an asset or liability position as of the respective date.

The Company's Valuation Group is made up of individuals from the Company's Risk Management, Treasury and Corporate Accounting departments. The Valuation Group is responsible for the Company's valuation policies, procedures and execution thereof. The Company's Valuation Group reports to the Company's Chief Financial Officer and seeks approval for certain fuel derivative transactions from the Audit Committee. The Valuation Group compares the results of the Company's internally developed valuation methods with counterparty reports at each balance sheet date and assesses the Company's valuation methods for accurateness and identifies any needs for modification.

The following table presents the Company's activity for assets and liabilities measured at gross fair value on a recurring basis using significant unobservable inputs (Level 3):

	Jet Fuel Option Activity for the Three Months Ended June 30, 2014
	(in thousands)
Balance at March 31, 2014	—
Total realized or unrealized gains (losses) included in earnings, net	(467		)
Purchases	827
Sales	—
Settlements, net	—
Balance at June 30, 2014	$	360

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Notes to Condensed Financial Statements—(Continued)

	Jet Fuel Option Activity for the Six Months Ended June 30, 2014
	(in thousands)
Balance at December 31, 2013	—
Total realized or unrealized gains (losses) included in earnings, net	(467		)
Purchases	827
Sales	—
Settlements, net	—
Balance at June 30, 2014	$	360

8. Tax Receivable Agreement

On June 1, 2011, the Company completed its initial public offering of common stock, or IPO. In connection with the IPO, the Company entered into a Tax Receivable Agreement (TRA) and thereby distributed immediately prior to the completion of the IPO to the holders of common stock as of such time, or the Pre-IPO Stockholders, the right to receive an amount equal to 90% of the cash savings in federal income tax realized by the Company by virtue of the use of the federal net operating loss, deferred interest deductions, and alternative minimum tax credits held by the Company as of March 31, 2011, which is defined as the Pre-IPO NOL. Cash tax savings generally will be computed by comparing the actual federal income tax liability to the amount of such taxes that the Company would have been required to pay had such Pre-IPO NOLs not been available. Upon consummation of the IPO and execution of the TRA, the Company recorded a liability with an offsetting reduction to additional paid-in-capital. The amount and timing of payments under the TRA depends upon a number of factors, including, but not limited to, the amount and timing of taxable income generated in the future and any future limitations that may be imposed on the Company's ability to use the Pre-IPO NOLs. The term of the TRA continues until the first to occur of (a) the full payment of all amounts required under the agreement with respect to utilization or expiration of all the Pre-IPO NOLs, (b) the end of the taxable year including the tenth anniversary of the IPO or (c) a change in control of the Company.

In accordance with the TRA, the Company is required to submit a Tax Benefit Schedule showing the proposed TRA payout amount to the Stockholder Representatives within 45 calendar days after the Company files its tax return. The Stockholder Representatives are Indigo Pacific Partners, LLC and OCM FIE, LLC, who represent the two largest ownership interests of pre-IPO shares. The Tax Benefit Schedule shall become final and binding on all parties unless a Stockholder Representative, within 45 calendar days after receiving such schedule, provides the Company with notice of a material objection to such schedule. If the parties, for any reason, are unable to successfully resolve the issues raised in any notice within 30 calendar days of receipt of such notice, the Company and the Stockholder Representatives shall employ the Reconciliation procedures. If the Tax Benefit Schedule is accepted, the Company has five days after the acceptance to make payments to the pre-IPO shareholders. Pursuant to the TRA's Reconciliation procedures, any disputes that cannot be settled amicably, are settled by arbitration conducted by a single arbitrator jointly selected by both parties.

During the second quarter of 2012, the Company paid $27.2 million, or 90% of the 2011 tax savings realized from the utilization of NOLs, including $0.3 million of applicable interest, to the Pre-IPO Stockholders.

During 2013, the Company filed an amended 2009 income tax return which resulted in a reduction to the estimated TRA liability from $8.0 million to $5.6 million. On September 13, 2013, the Company filed its 2012 federal income tax return, and on October 14, 2013 the Company submitted the Tax Benefit Schedule to the Stockholder Representatives. On November 27, 2013, pursuant to the TRA, the Company received an objection notice to the Tax Benefit Schedule from the Stockholder Representatives. After several unsuccessful attempts at resolving the objections, on April 7, 2014, the Company received a demand for arbitration from the Stockholder Representatives. Prior to commencing arbitration proceedings, on June 17, 2014, the Company and Stockholder Representatives agreed on a settlement amount of $7.0 million in addition to interest of $0.3 million. The agreed upon settlement was in excess of the outstanding liability of $5.6 million at the time of settlement. The excess payment of $1.4 million was recorded within other expense in the statement of operations and recorded as cash from operations in the statement of cash flows. As of June 30, 2014, the Company had made all payments in accordance with the agreed upon settlement terms and had no outstanding obligations related to the TRA.

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Notes to Condensed Financial Statements—(Continued)

9. Subsequent Events

On July 22, 2014, the Company executed a contract for the purchase of $13.0 million of rotable inventory to support its aircraft fleet.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act), which are subject to the “safe harbor” created by those sections. Forward-looking statements are based on our management’s beliefs and assumptions and on information currently available to our management. All statements other than statements of historical factors are “forward-looking statements” for purposes of these provisions. In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “could,” “would,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “project,” “predict,” and “potential,” and similar expressions intended to identify forward-looking statements. Such forward-looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified below, and those discussed in the section titled “Risk Factors” in this report and in Item 1A "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2013 and subsequent Quarterly Reports on Form 10-Q. Furthermore, such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.

Overview

Spirit Airlines is an ultra low-cost, low-fare airline headquartered in Miramar, Florida that offers affordable travel to price-conscious customers. Our all-Airbus fleet currently operates more than 270 daily flights to 55 destinations in the United States, the Caribbean and Latin America. Our stock trades on the NASDAQ Global Select Stock Market under the symbol "SAVE."

Our ultra low-cost carrier business model allows us to compete principally through offering low base fares and charging separately for select optional services, thereby allowing customers the freedom to save by choosing only the extras they value. We have unbundled components of our air travel service that have traditionally been included in base fares, such as baggage and advance seat selection, and offer them as optional, ancillary services (which we record in our financial statements as non-ticket revenue) as part of a strategy to enable our passengers to identify, select, and pay only for the services they want to use.

We are focused on price-sensitive travelers who pay for their own travel, and our business model is designed to deliver what we believe our customers want: low fares. We aggressively use low fares to stimulate air travel demand in order to increase passenger volume, load factors and non-ticket revenue on the flights we operate. Higher passenger volumes and load factors help us sell more ancillary products and services, which in turn allows us to reduce the base fare we offer even further, stimulating additional demand. We strive to be recognized by our customers and potential customers as the low-fare leader in the markets we serve.

We compete based on total price. We believe other airlines have used an all-inclusive pricing concept to effectively raise total prices to consumers, rather than lowering fares by unbundling each product or service. For example, carriers that tout “free bags” have included the cost of checking bags in the total ticket price, which does not allow passengers to see how much they would save if they did not check luggage. We believe that we and our customers benefit when we allow our customers to know the total price of their travel by breaking out the cost of optional products or services. Before they pay, our customers are able to see the total cost of flying with us and then compare it with the total cost of flying with another airline.

We allow our customers to see all available options and their prices prior to purchasing a ticket, and this full transparency illustrates that our total price, including options selected, is lower than other airlines on average. We recently launched an aggressive new brand campaign to educate the public on how Spirit's unbundled pricing model works and how that gives them choice and saves them money compared to other airlines.

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Comparative Operating Statistics:

The following tables set forth our operating statistics for the three-month and six-month period ended June 30, 2014 and 2013:

	Three Months Ended June 30,				Percent Change
	2014		2013
Operating Statistics (unaudited) (A):
Average aircraft	56.6		49.5		14.3	%
Aircraft at end of period	57		50		14.0	%
Airports served in the period	54		54		—	%
Average daily aircraft utilization (hours)	12.8		12.8		—	%
Average stage length (miles)	976		935		4.4	%
Block hours	65,732		57,693		13.9	%
Passenger flight segments (PFSs) (thousands)	3,569		3,111		14.7	%
Revenue passenger miles (RPMs) (thousands)	3,506,459		2,930,912		19.6	%
Available seat miles (ASMs) (thousands)	4,008,507		3,420,257		17.2	%
Load factor (%)	87.5	%	85.7	%	1.8 pts
Average ticket revenue per passenger flight segment ($)	84.75		77.51		9.3	%
Average non-ticket revenue per passenger flight segment ($)	55.15		53.43		3.2	%
Total revenue per passenger flight segment ($)	139.90		130.94		6.8	%
Average yield (cents)	14.24		13.90		2.4	%
RASM (cents)	12.46		11.91		4.6	%
CASM (cents)	9.83		9.96		(1.3	)%
Adjusted CASM (cents)	9.80		9.79		0.1	%
Adjusted CASM ex fuel (cents)	5.95		6.00		(0.8	)%
Fuel gallons consumed (thousands)	49,401		42,683		15.7	%
Average economic fuel cost per gallon ($)	3.13		3.03		3.3	%

(A) See "Glossary of Airline Terms" elsewhere in this quarterly report for definitions used in this table.

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	Six Months Ended June 30,				Percent Change
	2014		2013
Operating Statistics (unaudited) (A):
Average aircraft	55.8		48.1		16.0	%
Aircraft at end of period	57		50		14.0	%
Airports served in the period	54		54		—	%
Average daily aircraft utilization (hours)	12.8		12.7		0.8	%
Average stage length (miles)	988		938		5.3	%
Block hours	128,870		110,544		16.6	%
Passenger flight segments (PFSs) (thousands)	6,833		5,879		16.2	%
Revenue passenger miles (RPMs) (thousands)	6,795,746		5,592,403		21.5	%
Available seat miles (ASMs) (thousands)	7,793,234		6,547,470		19.0	%
Load factor (%)	87.2	%	85.4	%	1.8 pts
Average ticket revenue per passenger flight segment ($)	81.43		78.25		4.1	%
Average non-ticket revenue per passenger flight segment ($)	55.76		54.05		3.2	%
Total revenue per passenger flight segment ($)	137.19		132.30		3.7	%
Average yield (cents)	13.79		13.91		(0.9	)%
RASM (cents)	12.03		11.88		1.3	%
CASM (cents)	9.91		10.10		(1.9	)%
Adjusted CASM (cents)	9.89		9.96		(0.7	)%
Adjusted CASM ex fuel (cents)	6.01		6.02		(0.2	)%
Fuel gallons consumed (thousands)	96,078		81,311		18.2	%
Average economic fuel cost per gallon ($)	3.15		3.17		(0.6	)%

(A) See "Glossary of Airline Terms" elsewhere in this quarterly report for definitions used in this table.

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Executive Summary

For the second quarter of 2014, we achieved a 21.1% operating margin, an increase of 4.7 points compared to the prior year period. We generated pre-tax income of $103.8 million and net income of $64.8 million on operating revenues of $499.3 million. For the second quarter of 2013, we generated pre-tax income of $66.8 million and net income of $42.1 million on operating revenues of $407.3 million.

For the six months ended June 30, 2014, we achieved a 17.6% operating margin, an increase of 2.6 points compared to the prior year period. We generated pre-tax income of $163.8 million and net income of $102.6 million on operating revenues of $937.3 million. For the six months ended June 30, 2013, we generated pre-tax income of $116.5 million and net income of $72.6 million on operating revenues of $777.8 million.

Our adjusted CASM ex-fuel for the second quarter of 2014 was 5.95 cents, a 0.8%decrease year over year. The decrease on a per-unit basis is primarily due to lower passenger re-accommodation expense year over year driven by better operational performance during 2014, as compared to 2013. In addition, aircraft rent expense decreased, on a per-ASM basis, due to reduced rent expense related to 14 A319 aircraft for which lease extensions with reduced rates were negotiated with the lessor at the end of the second quarter of 2013. These decreases were partially offset by higher salaries and wages expense, higher depreciation and amortization expense and higher maintenance, materials and repairs expense on a per-ASM basis.

As of June 30, 2014, we had 57 Airbus A320-family aircraft in our fleet comprised of 29 A319s, 26 A320s, and 2 A321s. With the scheduled delivery of 8 A320s during the remainder of 2014, we expect to end 2014 with 65 aircraft in our fleet.

Comparison of three months ended June 30, 2014 to three months ended June 30, 2013

Operating Revenues

Operating revenues increased $92.0 million, or 22.6%, to $499.3 million for the second quarter of 2014, as compared to the second quarter of 2013 due primarily to an increase in traffic of 19.6%. The year-over-year increase was driven by our growth in flight volume and higher operating yields.

Total revenue per available seat mile (RASM) for the second quarter of 2014 was 12.46 cents, an increase of 4.6%, compared to the second quarter of 2013. Total revenue per passenger flight segment increased 6.8% from $130.94, in the second quarter of 2013, to $139.90 in the second quarter of 2014. Our average ticket fare per passenger flight segment increased from $77.51 to $84.75, or 9.3%, compared to the prior year period, and non-ticket revenue per passenger flight segment increased from $53.43 to $55.15, or 3.2%, compared to the prior year period. The calendar shift of Easter occurring in April of this year, as compared to March of last year, contributed to the strong 2014 second quarter results. The increase in non-ticket revenue was primarily driven by a higher volume of passengers selecting to purchase seat assignments, largely due to a recent software update that enables us to sell seat assignments through more channels as well as a more rigorous approach to revenue managing our seat inventory.

Operating Expenses

Operating expenses increased $53.6 million, or 15.7%, to $394.2 million for the second quarter of 2014 compared to $340.6 million for the second quarter of 2013, primarily due to our 17.2% capacity growth. The increases in salaries and wages expense, depreciation and amortization expense and maintenance, materials and repairs expense, which outpaced our growth in capacity, were offset by lower re-accommodation expense as a result of improved operational reliability.

Aircraft fuel expense includes into-plane fuel expense (defined below), realized and unrealized net gains or losses from fuel derivatives which includes cash paid or received from settled derivatives, mark-to-market adjustments on our outstanding fuel derivatives, and premium gain or loss recognized related to fuel option contracts. Into-plane fuel expense is defined as the price that we generally pay at the airport, including taxes and fees. Into-plane fuel prices are affected by the global oil market, refining costs, taxes and fees, which can vary by region in the United States and other countries where we operate. Into-plane fuel expense approximates cash paid to the supplier and does not reflect the effect of our fuel derivatives. Management chose not to elect hedge accounting on any derivative instruments during 2014 or 2013 and, as a result, changes in the fair value of these fuel derivative contracts are recorded each period in aircraft fuel expense.

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Aircraft fuel expense, our largest operating cost as a percentage of operating expenses, increased in the second quarter of 2014 by $19.6 million, or 14.5%, due to a 13.9%increase in block hours and a 3.3%increase in into-plane cost per gallon compared to the second quarter of 2013. This increase was partially offset by a decrease of $5.4 million in realized and unrealized net losses from fuel derivatives.

The elements of the changes in aircraft fuel expense are illustrated in the following table:

	Three Months Ended June 30,				Percent Change
	2014		2013
	(in thousands, except per gallon amounts)
Fuel gallons consumed	49,401		42,683		15.7	%
Into-plane fuel cost per gallon	$	3.13	$	3.03	3.3	%
Into-plane fuel expense	$	154,385	$	129,375	19.3	%
Cash paid (received) from settled derivatives, net	—		113		(100.0	)%
Impact on fuel expense from unrealized (gains) and losses arising from mark-to-market adjustments to our outstanding fuel derivatives	—		5,763		(100.0	)%
Premium expense recognized related to fuel option contracts	467		—		100.0	%
Aircraft fuel expense (per Statement of Operations)	$	154,852	$	135,251	14.5	%

Gulf Coast Jet indexed fuel is the basis for a substantial majority of our fuel consumption and is impacted by both the price of crude oil as well as increases or decreases in refining margins associated with the conversion of crude oil to jet fuel. The into-plane fuel cost per gallon increase of 3.3% was primarily a result of higher Gulf Coast Jet fuel prices during the second quarter of 2014 as compared to second quarter of 2013.

We track economic fuel expense, which we believe is the best measure of the effect fuel prices are currently having on our business, because it most closely approximates the net cash outflow associated with purchasing fuel used for our operations during the period. We define economic fuel expense as into-plane fuel expense, realized gains or losses on derivative contracts, plus the economic premium expense related to fuel option contracts in the period the option is benefiting. The key difference between aircraft fuel expense as recorded in our statement of operations and economic fuel expense is unrealized mark-to-market changes in the value of aircraft fuel derivatives outstanding and the timing of premium gain or loss recognition on our outstanding fuel option contracts. Many industry analysts evaluate airline results using economic fuel expense, and it is used in our internal management reporting.

The elements of the changes in economic fuel expense are illustrated in the following table:

	Three Months Ended June 30,				Percent Change
	2014		2013
	(in thousands, except per gallon amounts)
Into-plane fuel expense	$	154,385	$	129,375	19.3	%
Cash paid (received) from settled derivatives, net	—		113		(100.0	)%
Economic premium expense related to fuel option contracts	—		—		—	%
Economic fuel expense	$	154,385	$	129,488	19.2	%
Fuel gallons consumed	49,401		42,683		15.7	%
Economic fuel cost per gallon	$	3.13	$	3.03	3.3	%

We did not have any derivatives settle during the second quarter of 2014. Total net loss recognized for derivatives that settled during the second quarter of 2013 was $0.1 million. This amount represents the net cash paid for the settlement of derivatives. We had no unrealized gains and losses arising from mark-to-market adjustments to our outstanding fuel derivatives during the six months ended June 30, 2014. Total unrealized losses arising from mark-to-market adjustments to our outstanding fuel derivatives of $5.8 million for the quarter ended June 30, 2013 was due to a decrease in the market price, as indicated by the forward curve, for jet fuel when compared to that market as of the time of our derivative trade. For the quarter ended June 30, 2014, total premium expense recognized in earnings related to fuel option contracts was $0.5 million.

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Historically, during peak hurricane season (August through October), we enter into jet fuel derivative contracts to protect the refining price risk between the price of crude oil and the price of refined jet fuel. As of June 30, 2014, we had fuel derivatives consisting of jet fuel options with refined products as the underlying commodities designed to protect 52.5 million gallons, or approximately 50.1%, of our remaining 2014 anticipated jet fuel consumption at a weighted-average ceiling price of $3.25 per gallon.

We measure our operating cost performance on a per-ASM basis, since one ASM is the unit of production of an airline’s capacity. The following table presents our cost per-ASM, or unit cost, for the three months ended June 30, 2014 and 2013, followed by explanations of the material changes on a dollar basis and/or unit cost basis:

	Three Months Ended June 30,		Per-ASM Change		Percent Change
	2014	2013
	(in cents, except for percentages)
Aircraft fuel	3.86	3.95	(0.09	)	(2.3	)%
Salaries, wages, and benefits	1.94	1.88	0.06		3.2	%
Aircraft rent	1.20	1.23	(0.03	)	(2.4	)%
Landing fees and other rents	0.64	0.62	0.02		3.2	%
Distribution	0.50	0.51	(0.01	)	(2.0	)%
Maintenance, materials and repairs	0.48	0.44	0.04		9.1	%
Depreciation and amortization	0.28	0.22	0.06		27.3	%
Other operating	0.91	1.09	(0.18	)	(16.5	)%
Loss on disposal of assets	0.02	—	0.02		NA
Special charges (credits)	—	—	—		NA
CASM	9.83	9.96	(0.13	)	(1.3	)%
Adjusted CASM (1)	9.80	9.79	0.01		0.1	%
Adjusted CASM ex fuel (2)	5.95	6.00	(0.05	)	(0.8	)%

(1) For the three months ended June 30, 2014, adjusted CASM excludes premium expense recognized related to fuel option contracts of less than 0.01 cent per ASM, loss on disposal of assets of 0.02 cent per ASM and special charges of less than 0.01 cent per ASM. For the three months ended June 30, 2013, adjusted CASM excludes mark-to-market losses of less than 0.01 cent per ASM.

(2) Excludes aircraft fuel expense, loss on disposal of assets, and special charges and credits.

Our adjusted CASM ex-fuel for the second quarter of 2014 was down0.8% as compared to the same period in 2013. The decrease on a per-unit basis was primarily due to lower passenger re-accomodation year over year due to better operational performance during 2014, as compared to 2013.

Labor costs for the second quarter of 2014increased $13.0 million, or 20.1%, compared to the second quarter of 2013, primarily driven by a 16.3%increase in our pilot and flight attendant workforce resulting from the introduction of seven new aircraft since the second quarter of 2013. On a per-ASM basis, labor costs outpaced our capacity growth primarily due to an increase in our group health care costs.

Aircraft rent expense for the second quarter of 2014increased by $6.3 million, or 15.0%, compared to the second quarter of 2013. All our aircraft are financed through operating leases. This increase in aircraft rent expense was primarily driven by the delivery of seven new aircraft subsequent to the end of the second quarter of 2013. On a per-ASM basis, aircraft rent expense decreased due to reduced rent expense related to 14 A319 aircraft for which lease extensions with reduced rates were negotiated with the lessor at the end of the second quarter of 2013.

Landing fees and other rents for the second quarter of 2014increased $4.5 million, or 21.0%, as compared to the second quarter of 2013 primarily due to a 10.9%increase in departures as well as increased rates at certain airports where we operate. On a per-ASM basis, the increase in landing fees and other rents of 3.2%, as compared to the prior year period, was due to increased rates at certain airports as well as increased volume at higher-cost airports.

Distribution costs increased by $2.9 million, or 16.7%, in the second quarter of 2014 as compared to the second quarter of 2013. The increase was primarily due to increased sales volume and an increase of approximately 3.0 percentage points, year

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over year, in sales from third-party travel agents, which are more expensive than selling directly through our website. On a per-unit basis, distribution costs remained relatively flat due to the stability in credit card fee rates period over period.

Maintenance costs for the second quarter of 2014increased by $4.0 million, or 26.3%, compared to the prior year period. The increase in maintenance costs on a dollar basis and per unit basis was due to an increase in both the number and cost of scheduled maintenance events during the second quarter of 2014 as compared to the prior year. As our fleet ages, our aircraft require more comprehensive work during routine scheduled maintenance. We expect maintenance expense to increase significantly as our fleet continues to grow and age, resulting in the need for additional repairs over time.

Depreciation and amortization increased by $3.7 million primarily due to deferred heavy aircraft maintenance events, which in turn resulted in higher amortization expense recorded in the second quarter of 2014 compared to the prior year period.

We account for heavy maintenance under the deferral method. Under the deferral method, the cost of heavy maintenance is capitalized and amortized as a component of depreciation and amortization expense in the statement of operations until the earlier of the next heavy maintenance event or end of the lease term. The amortization of heavy maintenance costs was $9.0 million and $5.4 million for the second quarters of 2014 and 2013, respectively. If heavy maintenance events were amortized within maintenance, materials, and repairs expense in the statement of operations, our maintenance, materials, and repairs expense would have been $28.2 million and $20.6 million for the second quarters of 2014 and 2013, respectively.

Other operating expense for the second quarter of 2014decreased by $1.0 million, or 2.7%, compared to the second quarter of 2013. The decrease on both an absolute dollar basis and a per-ASM basis was primarily due to lower passenger re-accommodation expense as a result of improved operational reliability.

Other income (expenses)

Our interest expense and corresponding capitalized interest for the three months ended June 30, 2014 and 2013 represents primarily interest charged under the tax receivable agreement (TRA). Other expense of $1.4 million for the three months ended June 30, 2014 primarily relates to the settlement paid to the Pre-IPO Stockholders in excess of the liability we had previously estimated related to the TRA.

Income Taxes

Our effective tax rate for the second quarter of 2014 was 37.5% compared to 37.0% for the second quarter of 2013. The increase period over period was primarily related to an excess payment of $1.4 million on the TRA liability which was deemed non-deductible for U.S. federal income taxes. In arriving at these rates, we considered a variety of factors, including our forecasted full-year pre-tax results, the U.S. federal rate of 35%, expected nondeductible expenses, and estimated state income taxes. We evaluate our tax rate each quarter and make adjustments when necessary. Our final effective tax rate for the full year is dependent on the level of pre-tax income and the magnitude of any nondeductible expenses in relation to that pre-tax income.

Comparison of six months ended June 30, 2014 to six months ended June 30, 2013

Operating Revenues

Operating revenues increased $159.5 million, or 20.5%, to $937.3 million for the six months ended June 30, 2014, compared to the prior year period, as we achieved an 87.2% load factor on an increase in traffic of 21.5%.

Total RASM for the six months ended June 30, 2014 was 12.0 cents, an increase of 1.3% compared to the same period of 2013. Total revenue per passenger flight segment increased 3.7% from $132.30 for the six months ended June 30, 2013 to $137.19 for the six months ended June 30, 2014. Our average ticket fare per passenger flight segment increased from $78.25 to $81.43, or 4.1%, compared to the prior year period, and non-ticket revenue per passenger flight segment increased from $54.05 to $55.76, or 3.2%, compared to the prior year period. Stronger demand in the period allowed us to better leverage our ability to revenue manage our inventory, resulting in higher ticket revenue per passenger segment. This increase in non-ticket revenue was primarily driven by a higher volume of passengers selecting to purchase seat assignments, largely due to a recent software update that enables us to sell seat assignments through more channels as well as a more rigorous approach to revenue managing our seat inventory. Additionally, in July 2013, we made adjustments to our passenger usage fee (PUF) helping to drive the increase in PUF fees year over year.

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Operating Expenses

Operating expense increased for the six months ended June 30, 2014 by $110.9 million, or 16.8%, compared to the same period for 2013 primarily due to our 19.0% capacity growth. The increases in salaries and wages expense, depreciation and amortization expense and maintenance, materials and repairs expense, which outpaced our growth in capacity, were offset by lower re-accommodation expense as a result of improved operational reliability as well as lower aircraft rent resulting from renegotiated lease terms.

Aircraft fuel expense for the six months ended June 30, 2014increased $36.4 million, or 13.6%, compared to the prior year period as a result of a 16.6%increase in block hours, offset by a decrease of $8.4 million in net realized and unrealized losses from fuel derivatives and a 0.6%decrease for into-plane fuel cost per gallon, year over year. The elements of the changes are illustrated in the following table:

The elements of the changes in aircraft fuel expense are illustrated in the following table:

	Six Months Ended June 30,					Percent Change
	2014		2013
	(in thousands, except per gallon amounts)
Fuel gallons consumed	96,078		81,311			18.2	%
Into-plane fuel cost per gallon	$	3.15	$	3.17		(0.6	)%
Into-plane fuel expense	$	302,856	$	258,088		17.3	%
Cash paid (received) from settled derivatives, net	—		(315		)	(100.0	)%
Impact on fuel expense from unrealized (gains) and losses arising from mark-to-market adjustments to our outstanding fuel derivatives	—		9,144			(100.0	)%
Premium expense recognized related to fuel option contracts	467		—			100.0	%
Aircraft fuel expense (per Statement of Operations)	$	303,323	$	266,917		13.6	%

The elements of the changes in economic fuel expense are illustrated in the following table:

	Six Months Ended June 30,					Percent Change
	2014		2013
	(in thousands, except per gallon amounts)
Into-plane fuel expense	$	302,856	$	258,088		17.3	%
Cash paid (received) from settled derivatives, net	—		(315		)	(100.0	)%
Economic premium expense related to fuel option contracts	—		—			—	%
Economic fuel expense	$	302,856	$	257,773		17.5	%
Fuel gallons consumed	96,078		81,311			18.2	%
Economic fuel cost per gallon	$	3.15	$	3.17		(0.6	)%

We did not have any derivatives settle during the six months ended June 30, 2014. Total net gain recognized for derivatives that settled during the six months ended June 30, 2013 was $0.3 million. This amount represents the net cash received for the settlement of derivatives.

As of June 30, 2014, we had fuel derivatives consisting of jet fuel options with refined products as the underlying commodities designed to protect 52.5 million gallons, or approximately 50.1%, of our remaining 2014 anticipated jet fuel consumption at a weighted-average ceiling price of $3.25 per gallon. We had no unrealized gains and losses arising from mark-to-market adjustments to our outstanding fuel derivatives during the six months ended June 30, 2014. Total unrealized losses arising from mark-to-market adjustments to our outstanding fuel derivatives of $9.1 million for the six months ended June 30, 2013 was due to a decrease in the market price, as indicated by the forward curve, for jet fuel when compared to that market as of the time of our derivative trade. Total premium cost incurred during the six months ended June 30, 2014 for outstanding fuel derivatives was $0.5 million.

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We measure our operating cost performance on a per-ASM basis, since one ASM is the unit of production of an airline’s capacity. The following table presents our cost per-ASM, or unit cost, for the six months ended June 30, 2014 and 2013, followed by explanations of the material changes on a unit cost basis and/or dollar basis:

	Six Months Ended June 30,		Per-ASM Change		Percent Change
	2014	2013
	(in cents, except for percentages)
Aircraft fuel	3.89	4.08	(0.19	)	(4.7	)%
Salaries, wages, and benefits	1.97	1.92	0.05		2.6	%
Aircraft rent	1.21	1.27	(0.06	)	(4.7	)%
Landing fees and other rents	0.64	0.60	0.04		6.7	%
Distribution	0.50	0.50	—		—	%
Maintenance, materials and repairs	0.47	0.41	0.06		14.6	%
Depreciation and amortization	0.29	0.21	0.08		38.1	%
Other operating	0.92	1.10	(0.18	)	(16.4	)%
Loss on disposal of assets	0.01	—	0.01		NA
Special charges (credits)	—	—	—		NA
CASM	9.91	10.10	(0.19	)	(1.9	)%
Adjusted CASM (1)	9.89	9.96	(0.07	)	(0.7	)%
Adjusted CASM ex fuel (2)	6.01	6.02	(0.01	)	(0.2	)%

(1) For the six months ended June 30, 2014, adjusted CASM excludes premium expense recognized related to fuel option contracts of less than 0.01 cent per ASM, loss on disposal of assets of 0.01 cent per ASM and special charges of less than 0.01 cent per ASM. For the six months ended June 30, 2013, adjusted CASM excludes mark-to-market losses of less than 0.01 cent per ASM.

(2) Excludes aircraft fuel expense, loss on disposal of assets, and special charges and credits.

Our adjusted CASM ex-fuel for the six months ended June 30, 2014decreased by 0.2% as compared to the same period in 2013. The decrease on a per-unit basis was due primarily to lower passenger re-accommodation, year over year, due to better operational performance during 2014, as compared to 2013. In addition, on a per-ASM basis, aircraft rent expense decreased due to reduced rent expense related to 14 A319 aircraft for which lease extensions with reduced rates were negotiated with the lessor at the end of the second quarter of 2013. These decreases were partially offset by higher depreciation and amortization expense and higher maintenance, materials and repairs expense per ASM for the six months ended June 30, 2014, resulting from the increase in deferred heavy maintenance events as compared to the same period in 2013.

Labor costs for the six months ended June 30, 2014increased $27.7 million, or 22.0%, compared to same period in 2013, primarily driven by a 21.7%increase in our pilot and flight attendant workforce resulting from the introduction of seven new aircraft since the end of the second quarter of 2013. On a per-ASM basis, labor costs outpaced our capacity growth primarily due to an increase in our incentive pay and group health care costs.

Aircraft rent expense for the six months ended June 30, 2014increased by $11.6 million, or 14.0%, compared to the same period in 2013. This increase was primarily driven by the delivery of seven new aircraft subsequent to the end of the second quarter of 2013. On a per-ASM basis, aircraft rent expense decreased due to the reduced aircraft rent expense related to 14 A319 aircraft for which we negotiated reduced lease rates with the lessor at the end of the second quarter of 2013.

Landing fees and other rents for the six months ended June 30, 2014increased $10.4 million, or 26.5%, as compared to the same period in 2013 primarily due to a 12.1%increase in departures as well as increased rates at certain airports where we operate. On a per-ASM basis, landing fees and other rents increased, as compared to the prior year period, due to increased rates at certain airports as well as increased volume at higher-cost airports.

Distribution costs increased by $5.8 million, or 17.5%, for the six months ended June 30, 2014 as compared to the same period in 2013. The increase was due primarily to increased sales volume and an increase of approximately 3.0 percentage points, year over year, in sales from third-party travel agents, which are more expensive than selling directly through our website. On a per-unit basis, distribution costs remained relatively flat due to stability in credit card fee rates period over period.

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Maintenance costs for the six months ended June 30, 2014increased by $9.8 million, or 36.5%, compared to the prior year period. The increase in maintenance costs on a dollar basis and per unit basis resulted from an increase in both the number and cost of scheduled maintenance events during the six months ended June 30, 2014 as compared to the prior year. As our fleet ages, our aircraft require more comprehensive work during routine scheduled maintenance. We expect maintenance expense to increase significantly as our fleet continues to grow and age, resulting in the need for additional repairs over time.

Depreciation and amortization increased by $8.5 million primarily due to deferred heavy aircraft maintenance events, which in turn resulted in higher amortization expense recorded in the six months ended June 30, 2014 compared to the prior year period.

We account for heavy maintenance under the deferral method. Under the deferral method, the cost of heavy maintenance is capitalized and amortized as a component of depreciation and amortization expense in the statement of operations until the next heavy maintenance event or end of the lease term. The amortization of heavy maintenance costs was $18.0 million and $9.8 million for the six months ended of June 30, 2014 and 2013, respectively. If heavy maintenance events were amortized within maintenance, materials and repairs expense in the statement of operations, our maintenance, materials and repairs expense would have been $54.8 million and $36.8 million for the six months ended June 30, 2014 and 2013, respectively.

Other operating expense for the six months ended June 30, 2014decreased by $0.1 million, or 0.1%, compared to the prior year period. The decrease on both an absolute dollar basis and a per-ASM basis was due primarily to lower passenger re-accommodation expense as a result of improved operational reliability.

Other income (expenses)

Our interest expense and corresponding capitalized interest for the six months ended June 30, 2014 and 2013 represents primarily interest charged under the TRA. Other expense of $1.5 million for the six months ended June 30, 2014 primarily relates to the settlement paid to the Pre-IPO Stockholders in excess of the liability we had previously estimated related to the TRA.

Income Taxes

Our effective tax rate for the six months ended June 30, 2014 was 37.4% compared to 37.7% for the six months ended June 30, 2013. In arriving at these rates, we considered a variety of factors, including our forecast full-year pre-tax results, the U.S. federal rate of 35%, expected nondeductible expenses, and estimated state income taxes. We evaluate our tax rate each quarter and make adjustments when necessary. Our final effective tax rate for the full year is dependent on the level of pre-tax income and the magnitude of any nondeductible expenses in relation to that pre-tax income.

Liquidity and Capital Resources

Cash at June 30, 2014 was $567.2 million, an increase of $36.6 million, from December 31, 2013. Our primary use of cash is for working capital needs, capital expenditures, pre-delivery deposit payments (PDPs) and maintenance reserves.

Currently, our single largest capital need is to fund the acquisition costs of our aircraft.PDPs relating to future deliveries under our agreement with Airbus are required at various times prior to each delivery date. In the six months ended June 30, 2014, $16.0 million of PDPs have been returned related to delivered aircraft and engines in the period, and we have paid $110.0 million for future deliveries of aircraft and spare engines. As of June 30, 2014, we have $248.8 million of PDPs on our balance sheet.

In addition to funding the acquisition of our fleet, we are required to make maintenance reserve payments for a majority of our current fleet. Maintenance reserves are paid to aircraft lessors and are held as collateral in advance of our performance of major maintenance activities. In the six months ended June 30, 2014, we recorded an increase of $14.3 million in maintenance reserves, net of reimbursements, and as of June 30, 2014, we had $234.2 million ($48.5 million in prepaid expenses and other current assets and $185.7 million in aircraft maintenance deposits) on our balance sheet.

As of June 30, 2014, we had secured third-party financing commitments for our next four aircraft deliveries from Airbus, scheduled for delivery in 2014. We do not have financing commitments in place for the remaining 105 Airbus aircraft currently on firm order scheduled for delivery between the fourth quarter of 2014 through 2021. However, we signed letters of intent to finance the remaining 4 aircraft being delivered in 2014 and the first 11 aircraft being delivered in 2015 under secured debt arrangements. Future aircraft deliveries may be leased or otherwise financed based on market conditions, our prevailing level of liquidity, and capital market availability.

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Net Cash Flows Provided By Operating Activities. Operating activities in the six months ended June 30, 2014provided$144.1 million in cash compared to $134.3 millionprovided in the six months ended June 30, 2013. The increase resulted primarily from an increase in operations for the six months ended June 30, 2014 as compared to the prior year period.

Net Cash Flows Used In Investing Activities. In the six months ended June 30, 2014, investing activities used$101.4 million, compared to $33.6 millionused in the prior year period. The increase was due mainly to an increase in paid PDPs, net of refunds, during the six months ended June 30, 2014, as compared to the prior year period, driven by the timing of aircraft deliveries. Capital expenditures decreased period over period mainly due to the purchase of a spare engine in the first quarter of 2013.

Net Cash Flows (Used in) Provided By Financing Activities. During the six months ended June 30, 2014, financing activities used$6.1 million primarily due to the payment of $5.6 million made to pre-IPO shareholders, pursuant to the tax receivable agreement, during the second quarter of 2014. In the prior year, financing activities provided $7.4 million mainly resulting from a sale and leaseback transaction of a spare engine.

Commitments and Contractual Obligations

The following table discloses aggregate information about our contractual obligations as of June 30, 2014 and the periods in which payments are due (in millions):

	Remainder of 2014		2015 - 2016		2017 - 2018		2019 and beyond		Total
Operating lease obligations	$	109	$	421	$	349	$	628	$	1,507
Flight equipment purchase obligations	350		1,259		1,372		2,207		5,188
Other	2		8		6		—		16
Total future payments on contractual obligations	$	461	$	1,688	$	1,727	$	2,835	$	6,711

Some of our master lease agreements provide that we pay maintenance reserves to aircraft lessors to be held as collateral in advance of our required performance of major maintenance activities. Some maintenance reserve payments are fixed contractual amounts, while others are based on utilization. In addition to the contractual obligations disclosed in the table above, we have fixed maintenance reserve payments for these aircraft and related flight equipment, including estimated amounts for contractual price escalations, which are approximately $3.7 million for the remainder of 2014, $7.6 million in 2015, $8.0 million in 2016, $7.4 million in 2017, $5.8 million in 2018, and $18.4 million in 2019 and beyond.

Off-Balance Sheet Arrangements

We have significant obligations for aircraft as all 57 of our aircraft are financed under operating leases and therefore are not reflected on our balance sheets. These leases expire between 2016 and 2025. Aircraft rent payments were $49.1 million and $41.9 million for the three months ended June 30, 2014 and 2013, respectively, and $97.0 million and $82.1 million for the six months ended June 30, 2014 and 2013, respectively. Our aircraft lease payments for 52 of our aircraft are fixed-rate obligations. Five of our aircraft leases provide for variable rent payments, which fluctuate based on changes in LIBOR (the London Interbank Offered Rate).

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Our contractual purchase commitments consist primarily of aircraft and engine acquisitions through manufacturers and aircraft leasing companies. As of June 30, 2014, our aircraft orders consisted of the following:

	Airbus				Third-Party Lessor
	A320	A320NEO	A321	A321NEO	A320NEO	Total
remainder of 2014	8					8
2015	8		6		1	15
2016	3		9		4	16
2017	8		10			18
2018	2	6	5			13
2019		3		10		13
2020		13				13
2021		18				18
	29	40	30	10	5	114

We also have six spare engine orders for V2500 SelectOne engines with IAE and nine spare engine orders for PurePower PW1100G-JM engines with Pratt & Whitney. Spare engines are scheduled for delivery from 2014 through 2024. Committed expenditures for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and aircraft PDPs, are expected to be approximately $350 million for the remainder of 2014, $658 million in 2015, $601 million in 2016, $757 million in 2017, $615 million in 2018 and $2,207 million in 2019 and beyond.

As of June 30, 2014, we had lines of credit related to corporate credit cards of $18.6 million from which we had drawn $4.4 million.

As of June 30, 2014, we had lines of credit with counterparties for both physical fuel delivery and jet fuel derivatives in the amount of $34.5 million. As of June 30, 2014, we had drawn $11.0 million on these lines of credit. We are required to post collateral for any excess above the lines of credit if the derivatives are in a net liability position and make periodic payments in order to maintain an adequate undrawn portion for physical fuel delivery. As of June 30, 2014, we were not required to post collateral for these instruments.

As of June 30, 2014, we had $6.4 million in uncollateralized surety bonds and a $25.1 million in unsecured standby letter of credit facilities of which $10.0 million had been drawn upon for issued letters of credit.

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GLOSSARY OF AIRLINE TERMS

Set forth below is a glossary of industry terms:

“Adjusted CASM” means operating expenses, excluding mark-to-market gains or losses and the change in value of the option premium recognized in earnings, including the cost of economic premium recognized over the period the option is benefiting, loss on disposal of assets, and special charges (credits), divided by ASMs.

“Adjusted CASM ex fuel” means operating expenses excluding aircraft fuel expense, loss on disposal of assets, and special charges (credits), divided by ASMs.

“AFA-CWA” means the Association of Flight Attendants-CWA.

“Air traffic liability” or “ATL” means the value of tickets sold in advance of travel.

“ALPA” means the Airline Pilots Association, International.

“ASIF” means an Aviation Security Infrastructure Fee assessed by the TSA on each airline.

“Available seat miles” or “ASMs” means the number of seats available for passengers multiplied by the number of miles the seats are flown, also referred to as "capacity."

“Average aircraft” means the average number of aircraft in our fleet as calculated on a daily basis.

“Average daily aircraft utilization” means block hours divided by number of days in the period divided by average aircraft.

“Average economic fuel cost per gallon” means total aircraft fuel expense, excluding mark-to-market gains and losses and the change in value of the option premium recognized in earnings, plus the cost of economic premium recognized over the period the option is benefiting, divided by the total number of fuel gallons consumed.

“Average non-ticket revenue per passenger flight segment” means the total non-ticket revenue divided by passenger flight segments.

“Average ticket revenue per passenger flight segment” means total passenger revenue divided by passenger flight segments.

“Average stage length” represents the average number of miles flown per flight.

“Average yield” means average operating revenue earned per RPM, calculated as total revenue divided by RPMs.

“Block hours” means the number of hours during which the aircraft is in revenue service, measured from the time of gate departure before take-off until the time of gate arrival at the destination.

“CASM” or “unit costs” means operating expenses divided by ASMs.

“CBA” means a collective bargaining agreement.

“CBP” means United States Customs and Border Protection.

“DOT” means the United States Department of Transportation.

“EPA” means the United States Environmental Protection Agency.

“FAA” means the United States Federal Aviation Administration.

“FCC” means the United States Federal Communications Commission.

“FLL Airport” means the Fort Lauderdale-Hollywood International Airport.

“GDS” means Global Distribution System (e.g., Amadeus, Galileo, Sabre and Worldspan).

“Into-plane fuel cost per gallon” means into-plane fuel expense divided by number of fuel gallons consumed.

“Into-plane fuel expense” represents the cost of jet fuel and certain other charges such as fuel taxes and oil.

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“Load factor” means the percentage of aircraft seats actually occupied on a flight (RPMs divided by ASMs).

“NMB” means the National Mediation Board.

“Operating revenue per-ASM,” “RASM” or “unit revenue” means operating revenue divided by ASMs.

“OTA” means Online Travel Agent (e.g., Orbitz and Travelocity).

“Passenger flight segments” or “PFS” means the total number of passengers flown on all flight segments.

“PDP” means pre-delivery deposit payment.

“Revenue passenger mile” or “RPM” means one revenue passenger transported one mile. RPMs equals revenue passengers multiplied by miles flown, also referred to as “traffic.”

“RLA” means the United States Railway Labor Act.

“TWU” means the Transport Workers Union of America.

“TSA” means the United States Transportation Security Administration.

“ULCC” means “ultra low-cost carrier.”

“VFR” means visiting friends and relatives.

“Wet-leased aircraft” means a lease where the lessor provides for aircraft, crew, maintenance and insurance, also known as an “ACMI.”

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market Risk-Sensitive Instruments and Positions

We are subject to certain market risks, including commodity prices (specifically aircraft fuel). The adverse effects of changes in these markets could pose a potential loss as discussed below. The sensitivity analysis provided below does not consider the effects that such adverse changes may have on overall economic activity, nor does it consider additional actions we may take to mitigate our exposure to such changes. Actual results may differ.

Aircraft Fuel. Our results of operations can vary materially due to changes in the price and availability of aircraft fuel. Aircraft fuel expense for the six months ended June 30, 2014 and 2013 represented 39.3% and 40.4% of our operating expenses, respectively. Increases in aircraft fuel prices or a shortage of supply could have a material adverse effect on our operations and operating results. We source a significant portion of our fuel from refining resources located in the southeast United States, particularly facilities adjacent to the Gulf of Mexico. Gulf Coast fuel is subject to volatility and supply disruptions, particularly during hurricane season when refinery shutdowns have occurred, or when the threat of weather related disruptions has caused Gulf Coast fuel prices to spike above other regional sources. During peak hurricane season (August through October), we may enter into fuel derivative contracts to protect the refining price risk between the price of crude oil and the price of refined jet fuel. Gulf Coast Jet indexed fuel is the basis for a substantial majority of our fuel consumption. Based on our fuel consumption over the last twelve months, a 10% increase in the average price per gallon of aircraft fuel would have increased aircraft fuel expense by approximately $58.8 million. To attempt to manage fuel price risk, from time to time we use jet fuel options or jet fuel swaps to mitigate a portion of the crack spread between crude and jet fuel. As of June 30, 2014, we had jet fuel option agreements in place to protect 52.5 million gallons, or approximately 50.1%, of its remaining 2014 anticipated jet fuel consumption at a weighted-average ceiling price of $3.25 per gallon.

We measure our financial derivative instruments at fair value. Fair value of the instruments is determined using standard option valuation models. Changes in the related commodity derivative instrument cash flows may change by more or less than this amount based upon further fluctuations in futures prices. Outstanding financial derivative instruments expose us to credit loss in the event of nonperformance by the counterparties to the agreements. However, we do not expect the counterparties to fail to meet their obligations.

Interest Rates. We have market risk associated with changing interest rates due to LIBOR-based lease rates on five of our aircraft. A hypothetical 10% change in interest rates in 2013 would affect total aircraft rent expense in 2014 by less than $0.1 million.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2014. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of June 30, 2014, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the quarter ended June 30, 2014, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We are subject to commercial litigation claims and to administrative and regulatory proceedings and reviews that may be asserted or maintained from time to time. We believe the ultimate outcome of pending lawsuits, proceedings and reviews will not, individually or in the aggregate, have a material adverse effect on our financial position, liquidity, or results of operations.

ITEM 1A. RISK FACTORS

There have been no material changes to the risk factors disclosed in Item 1A Risk Factors contained in our Annual Report on Form 10-K for the year ended December 31, 2013. Investors are urged to review these risk factors carefully.

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ITEM 6. EXHIBITS

Exhibit Number	Description of Exhibits
31.1	Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2*	Certification of the 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
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

* Exhibits 32.1 and 32.2 are being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall such exhibits be deemed to be incorporated by reference in any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as otherwise specifically stated in such filing.

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SIGNATURE

Pursuant to the requirements 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.

	SPIRIT AIRLINES, INC.
Date: July 29, 2014	By:	/s/ Edward Christie
		Edward Christie
		Senior Vice President and Chief Financial Officer

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, B. Ben Baldanza, President and Chief Executive Officer of Spirit Airlines, Inc., certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spirit Airlines, Inc. (the "Registrant");

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 described in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and 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 most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) 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 officer 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 (or persons performing the equivalent functions):

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.

Date: July 29, 2014	/s/ B. Ben Baldanza
	B. Ben Baldanza
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Edward Christie, Senior Vice President and Chief Financial Officer of Spirit Airlines, Inc., certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spirit Airlines, Inc. (the "Registrant");

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 described in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and 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 Company’s most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) 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 officer 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 (or persons performing the equivalent functions):

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.

Date: July 29, 2014	/s/ Edward M. Christie
	Edward M. Christie
	Senior Vice President and
	Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. § 1350 As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Spirit Airlines, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i.) the Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2014 (the "Report") fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii.) the information contained in the Report fairly present, in all material respects, the financial condition and results of operations of the Company.

Date: July 29, 2014	/s/ B. Ben Baldanza
	B. Ben Baldanza
	President and Chief Executive Officer

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer Pursuant to 18 U.S.C. § 1350 As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Spirit Airlines, Inc. (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i.) the Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2014 (the "Report") fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii.) the information contained in the Report fairly present, in all material respects, the financial condition and results of operations of the Company.

Date: July 29, 2014	/s/ Edward Christie
	Edward Christie
	Senior Vice President and
	Chief Financial Officer

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Fair Value Measurements - Unobservable Inputs (Details) (Jet fuel options [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Jet fuel options [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 0	$ 0
Total realized or unrealized gains (losses) included in earnings, net	(467)	(467)
Purchases	827	827
Sales	0	0
Settlements, net	0	0
Ending Balance	$ 360	$ 360

XML

Commitments and Contingencies - Commitments (Details) (USD $)	Jun. 30, 2014 aircraft
Airbus [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of Aircraft without Secured Financing Commitments Scheduled for Delivery (in aircraft)	105
Airbus [Member] | 2014 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of Aircraft with Secured Financing Commitments Scheduled for Delivery (in aircraft)	4
Airbus [Member] | Fourth Quarter of 2014 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of Aircraft without Secured Financing Commitments Scheduled for Delivery (in aircraft)	4
Airbus [Member] | 2015 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of Aircraft without Secured Financing Commitments Scheduled for Delivery (in aircraft)	11
Aircraft and Related Flight Equipment [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	$ 350,000,000
Unrecorded Unconditional Purchase Obligation, Due in 2015	658,000,000
Unrecorded Unconditional Purchase Obligation, Due in 2016	601,000,000
Unrecorded Unconditional Purchase Obligation, Due in 2017	757,000,000
Unrecorded Unconditional Purchase Obligation, Due in 2018	615,000,000
Unrecorded Unconditional Purchase Obligation, Due in 2019 and beyond	$ 2,207,000,000
V2500 SelectOne Engine [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of spare aircraft engines ordered (in aircraft engine)	6
PurePower PW1100G-JM Engine [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of spare aircraft engines ordered (in aircraft engine)	9

XML

Financial Instruments and Risk Management

6 Months Ended

Jun. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Financial Instruments and Risk Management

Financial Instruments and Risk Management

As part of the Company’s risk management program, the Company from time to time uses a variety of financial instruments to reduce its exposure to fluctuations in the price of jet fuel. The Company does not hold or issue derivative financial instruments for trading purposes.

The Company is exposed to credit losses in the event of nonperformance by counterparties to these financial instruments. The Company periodically reviews and seeks to mitigate exposure to the financial deterioration and nonperformance of any counterparty by monitoring the absolute exposure levels, each counterparty's credit ratings, and the historical performance of the counterparties relating to derivative transactions. The credit exposure related to these financial instruments is limited to the fair value of contracts in a net receivable position at the reporting date. The Company also maintains security agreements that require the Company to post collateral if the value of selected instruments falls below specified mark-to-market thresholds. As of June 30, 2014, the Company was not required to post collateral for these instruments.

The Company records financial derivative instruments at fair value, which includes an evaluation of each counterparty's credit risk. The Company's derivative contracts generally consist of United States Gulf Coast jet fuel swaps (jet fuel swaps) and United States Gulf Coast jet fuel options (jet fuel options). Both jet fuel swaps and jet fuel options are used at times to protect the refining price risk between the price of crude oil and the price of refined jet fuel, and to manage the risk of increasing fuel prices. Fair value of the instruments is determined using standard option valuation models.

The Company did not elect hedge accounting on any derivative instruments entered into during the three and six months ended June 30, 2014 and 2013 and, as a result, changes in the fair value of these fuel derivative contracts are recorded in aircraft fuel expense. Premiums paid or received for fuel options are recognized in earnings within aircraft fuel expense as the fair value of the time value portion of each option changes.

The following table summarizes the components of aircraft fuel expense for the three and six months ended June 30, 2014 and 2013:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands)
Into-plane fuel cost	$	154,385	$	129,375	$	302,856	$	258,088
Settlement losses (gains)	—		113		—		(315		)
Unrealized mark-to-market losses (gains)	—		5,763		—		9,144
Premium expense recognized related to fuel option contracts	467		—		467		—
Aircraft fuel	$	154,852	$	135,251	$	303,323	$	266,917

Premiums and settlements received or paid on fuel derivative contracts are reflected in the accompanying statements of cash flows in net cash provided by operating activities.

Historically, during peak hurricane season (August through October), the Company has entered into jet fuel derivative contracts to protect the refining price risk between the price of crude oil and the price of refined jet fuel. As of June 30, 2014, the Company had fuel derivatives consisting of jet fuel options with refined products as the underlying commodities designed to protect 52.5 million gallons, or approximately 50.1%, of its remaining 2014 anticipated jet fuel consumption at a weighted-average ceiling price of $3.25 per gallon. As of December 31, 2013, the Company had no outstanding fuel derivatives in place.

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Commitments and Contingencies - Insurance Deductible (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Insurance Deductible	$ 0.8

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Commitments and Contingencies - Fixed Maintenance Reserve Payments and Other Commitments (Details) (USD $)	Jun. 30, 2014
Fixed Maintenance Reserve Payments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	$ 3,700,000
Unrecorded Unconditional Purchase Obligation, Due in 2015	7,600,000
Unrecorded Unconditional Purchase Obligation, Due in 2016	8,000,000
Unrecorded Unconditional Purchase Obligation, Due in 2017	7,400,000
Unrecorded Unconditional Purchase Obligation, Due in 2018	5,800,000
Unrecorded Unconditional Purchase Obligation, Due in 2019 and beyond	18,400,000
Reservation System and Advertising Media [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	1,900,000
Unrecorded Unconditional Purchase Obligation, Due in 2015	3,900,000
Unrecorded Unconditional Purchase Obligation, Due in 2016	3,900,000
Unrecorded Unconditional Purchase Obligation, Due in 2017	3,900,000
Unrecorded Unconditional Purchase Obligation, Due in 2018	2,600,000
Unrecorded Unconditional Purchase Obligation, Due in 2019 and beyond	$ 0

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Commitments and Contingencies - Credit Card Processing Arrangements (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Cash collateral required for credit card transactions as a percentage of air traffic liability, prior to amendment	100.00%
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash holdbacks	$ 0	$ 0
Maximum [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash holdbacks	$ 265,500,000	$ 188,600,000

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Commitments and Contingencies - Employees (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended					6 Months Ended
	Dec. 31, 2013	Jun. 30, 2014 Health Insurance [Member]	Dec. 31, 2013 Health Insurance [Member]	Jul. 08, 2014 Subsequent Event [Member] airport	Jul. 08, 2014 International Association Of Machinists And Aerospace Workers (IAM) [Member] Subsequent Event [Member] airport	Jun. 30, 2014 Unionized Employees Concentration Risk [Member] Number of Employees, Total [Member]	Jun. 30, 2014 Unionized Employees Concentration Risk [Member] Number of Employees, Total [Member] Air Line Pilots Association, International [Member]	Jun. 30, 2014 Unionized Employees Concentration Risk [Member] Number of Employees, Total [Member] Association of Flight Attendants [Member]	Jun. 30, 2014 Unionized Employees Concentration Risk [Member] Number of Employees, Total [Member] Transport Workers Union [Member]
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements (as a percent)						59.00%	24.00%	34.00%	1.00%
Collective bargaining agreement, contract term	5 years
Number of airports in which entity operates				55	4
Liability for Claims and Claims Adjustment Expense [Line Items]
Accrued health care claims		$ 2.2	$ 2.1

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Accrued Liabilities

6 Months Ended

Jun. 30, 2014

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

Other current liabilities as of June 30, 2014 and December 31, 2013 consist of the following:

	June 30, 2014		December 31, 2013
	(in thousands)
Federal excise and other passenger taxes and fees payable	$	36,006	$	26,979
Salaries and wages	28,640		26,174
Aircraft maintenance	23,322		36,165
Airport expenses	17,322		17,109
Fuel	11,037		13,819
Federal and state income tax payable	9,091		794
Aircraft and facility rent	8,605		7,993
Other	12,601		16,229
Other current liabilities	$	146,624	$	145,262

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Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 567.2	$ 530.6
Total assets	567.6	530.6
Total liabilities	0	0
Jet fuel options [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0.4
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	567.2	530.6
Total assets	567.2	530.6
Total liabilities	0	0
Level 1 [Member] | Jet fuel options [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Total assets	0	0
Total liabilities	0	0
Level 2 [Member] | Jet fuel options [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Total assets	0.4	0
Total liabilities	0	0
Level 3 [Member] | Jet fuel options [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 0.4

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Condensed Statements Of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating revenues:
Passenger	$ 302,487	$ 241,119	$ 556,365	$ 460,016
Non-ticket	196,850	166,220	380,959	317,760
Total operating revenues	499,337	407,339	937,324	777,776
Operating expenses:
Aircraft fuel	154,852	135,251	303,323	266,917
Salaries, wages and benefits	77,440	64,456	153,689	125,953
Aircraft rent	48,222	41,915	94,609	82,987
Landing fees and other rents	25,831	21,346	49,847	39,402
Distribution	20,159	17,277	38,728	32,958
Maintenance, materials and repairs	19,205	15,202	36,819	26,982
Depreciation and amortization	11,344	7,604	22,465	13,928
Other operating	36,408	37,416	71,856	71,915
Loss on disposal of assets	715	91	865	261
Special charges (credits)	17	23	26	46
Total operating expenses	394,193	340,581	772,227	661,349
Operating income	105,144	66,758	165,097	116,427
Other (income) expense:
Interest expense	103	95	210	104
Capitalized interest	(103)	(95)	(210)	(104)
Interest income	(83)	(105)	(151)	(221)
Other expense	1,439	36	1,476	137
Total other (income) expense	1,356	(69)	1,325	(84)
Income before income taxes	103,788	66,827	163,772	116,511
Provision for income taxes	38,939	24,759	61,217	43,889
Net income	$ 64,849	$ 42,068	$ 102,555	$ 72,622
Basic earnings per share (in dollars per share)	$ 0.89	$ 0.58	$ 1.41	$ 1.00
Diluted earnings per share (in dollars per share)	$ 0.88	$ 0.58	$ 1.40	$ 1.00

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Recent Accounting Developments

6 Months Ended

Jun. 30, 2014

Accounting Changes and Error Corrections [Abstract]

Recent Accounting Developments

Recent Accounting Developments

In May 2014, the Financial Accounting Standards Board (the FASB) issued Accounting Standards Update (ASU) No. 2014-09, (ASU 2014-09), "Revenue from Contracts with Customers." The objective of ASU 2014-19 is to establish a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and will supersede most of the existing revenue recognition guidance, including industry-specific guidance. The core principle of ASU 2014-09 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the new guidance, an entity will (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the contract's performance obligations; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. The new guidance is effective for annual reporting periods (including interim periods within those periods) beginning after December 15, 2016 for public companies. Early adoption is not permitted. Entities have the option of using either a full retrospective or modified approach to adopt ASU 2014-09. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements nor decided upon the method of adoption.

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Subsequent Events (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	Jul. 22, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]
Purchased inventory	$ 13.0

XML

Financial Instruments and Risk Management (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Into-plane fuel cost	$ 154,385	$ 129,375	$ 302,856	$ 258,088
Settlement losses (gains)	0	113	0	(315)
Unrealized mark-to-market losses (gains)	0	5,763	0	9,144
Premium expense recognized related to fuel option contracts	467	0	467	0
Aircraft fuel	$ 154,852	$ 135,251	$ 303,323	$ 266,917

XML

Commitments and Contingencies - Aircraft Contractual Purchase Commitments (Details)	Jun. 30, 2014 aircraft
Long-term Purchase Commitment [Line Items]
Future Aircraft To Be Received, Remainder of FIscal Year	8
Future Aircraft To Be Received, in Two Years	15
Future Aircraft To Be Received, in Three Years	16
Future Aircraft To Be Received, in Four Years	18
Future Aircraft To Be Received, in Five Years	13
Future Aircraft To Be Received, in Six Years	13
Future Aircraft To Be Received, in Seven Years	13
Future Aircraft To Be Received, in Eight Years	18
Future Aircraft To Be Received	114
Airbus [Member] | Airbus 320 [Member]
Long-term Purchase Commitment [Line Items]
Future Aircraft To Be Received, Remainder of FIscal Year	8
Future Aircraft To Be Received, in Two Years	8
Future Aircraft To Be Received, in Three Years	3
Future Aircraft To Be Received, in Four Years	8
Future Aircraft To Be Received, in Five Years	2
Future Aircraft To Be Received	29
Airbus [Member] | Airbus A320 NEO [Member]
Long-term Purchase Commitment [Line Items]
Future Aircraft To Be Received, in Five Years	6
Future Aircraft To Be Received, in Six Years	3
Future Aircraft To Be Received, in Seven Years	13
Future Aircraft To Be Received, in Eight Years	18
Future Aircraft To Be Received	40
Airbus [Member] | Airbus A321 [Member]
Long-term Purchase Commitment [Line Items]
Future Aircraft To Be Received, in Two Years	6
Future Aircraft To Be Received, in Three Years	9
Future Aircraft To Be Received, in Four Years	10
Future Aircraft To Be Received, in Five Years	5
Future Aircraft To Be Received	30
Airbus [Member] | Airbus A321 NEO [Member]
Long-term Purchase Commitment [Line Items]
Future Aircraft To Be Received, in Six Years	10
Future Aircraft To Be Received	10
Third Party Lessor [Member] | Airbus A320 NEO [Member]
Long-term Purchase Commitment [Line Items]
Future Aircraft To Be Received, in Two Years	1
Future Aircraft To Be Received, in Three Years	4
Future Aircraft To Be Received	5

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Earnings per Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands, except per share amounts)
Numerator
Net income	$	64,849	$	42,068	$	102,555	$	72,622
Denominator
Weighted-average shares outstanding, basic	72,740		72,593		72,712		72,540
Effect of dilutive stock awards	554		399		562		358
Adjusted weighted-average shares outstanding, diluted	73,294		72,992		73,274		72,898
Net Income per Share
Basic earnings per common share	$	0.89	$	0.58	$	1.41	$	1.00
Diluted earnings per common share	$	0.88	$	0.58	$	1.40	$	1.00
Anti-dilutive weighted-average shares	57		2		56		1

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Condensed Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 567,239	$ 530,631
Accounts receivable, net	37,467	23,246
Deferred income taxes	15,166	16,243
Prepaid expenses and other current assets	68,589	78,955
Total current assets	688,461	649,075
Property and equipment:
Flight equipment	12,397	9,847
Ground and other equipment	55,112	50,987
Less accumulated depreciation	(29,516)	(25,221)
Total property and equipment	37,993	35,613
Deposits on flight equipment purchase contracts	248,770	157,669
Aircraft maintenance deposits	185,699	161,484
Deferred heavy maintenance, net	129,021	125,288
Other long-term assets	59,906	51,636
Total assets	1,349,850	1,180,765
Current liabilities:
Accounts payable	21,842	23,104
Air traffic liability	232,072	167,627
Other current liabilities	146,624	145,262
Total current liabilities	400,538	335,993
Long-term deferred income taxes	47,443	48,916
Deferred credits and other long-term liabilities	26,258	26,739
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	520,492	515,331
Treasury stock	(3,513)	(2,291)
Retained earnings	358,625	256,070
Total shareholders’ equity	875,611	769,117
Total liabilities and shareholders’ equity	$ 1,349,850	$ 1,180,765

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Financial Instruments and Risk Management (Tables)

6 Months Ended

Jun. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Components of aircraft fuel expense

The following table summarizes the components of aircraft fuel expense for the three and six months ended June 30, 2014 and 2013:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands)
Into-plane fuel cost	$	154,385	$	129,375	$	302,856	$	258,088
Settlement losses (gains)	—		113		—		(315		)
Unrealized mark-to-market losses (gains)	—		5,763		—		9,144
Premium expense recognized related to fuel option contracts	467		—		467		—
Aircraft fuel	$	154,852	$	135,251	$	303,323	$	266,917

XML

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 21, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Entity Registrant Name	SPIRIT AIRLINES, INC.
Entity Central Index Key	0001498710
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		72,746,694

XML

Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Operating Aircraft Leases

As of June 30, 2014, the Company's aircraft orders consisted of the following:

	Airbus				Third-Party Lessor
	A320	A320NEO	A321	A321NEO	A320NEO	Total
remainder of 2014	8					8
2015	8		6		1	15
2016	3		9		4	16
2017	8		10			18
2018	2	6	5			13
2019		3		10		13
2020		13				13
2021		18				18
	29	40	30	10	5	114

Future minimum lease payments under noncancelable capital leases

Future minimum lease payments under capital leases and noncancellable operating leases with initial or remaining terms in excess of one year at June 30, 2014 were as follows:

			Operating Leases
	Capital Leases		Aircraft and Spare Engine Leases		Property Facility Leases		Operating Lease Obligations
	(in thousands)
remainder of 2014	$	923	$	98,287	$	10,272	$	108,559
2015	1,244		197,137		17,256		214,393
2016	1,044		195,312		11,359		206,671
2017	44		178,811		8,832		187,643
2018	44		155,123		6,445		161,568
2019 and thereafter	12		603,289		24,406		627,695
Total minimum lease payments	$	3,311	$	1,427,959	$	78,570	$	1,506,529
Less amount representing interest	$	324
Present value of minimum lease payments	$	2,987
Less current portion	$	1,324
Long term portion	$	1,663

Future minimum lease payments under noncancelable operating leases

Future minimum lease payments under capital leases and noncancellable operating leases with initial or remaining terms in excess of one year at June 30, 2014 were as follows:

			Operating Leases
	Capital Leases		Aircraft and Spare Engine Leases		Property Facility Leases		Operating Lease Obligations
	(in thousands)
remainder of 2014	$	923	$	98,287	$	10,272	$	108,559
2015	1,244		197,137		17,256		214,393
2016	1,044		195,312		11,359		206,671
2017	44		178,811		8,832		187,643
2018	44		155,123		6,445		161,568
2019 and thereafter	12		603,289		24,406		627,695
Total minimum lease payments	$	3,311	$	1,427,959	$	78,570	$	1,506,529
Less amount representing interest	$	324
Present value of minimum lease payments	$	2,987
Less current portion	$	1,324
Long term portion	$	1,663

Employee groups and status of the collective bargaining agreements

The table below sets forth the Company's employee groups and status of the collective bargaining agreements as of June 30, 2014.

Employee Groups	Representative	Amendable Date	Percentage of Workforce
Pilots	Air Line Pilots Association, International (ALPA)	August 2015	24%
Flight Attendants	Association of Flight Attendants (AFA-CWA)	August 2007	34%
Dispatchers	Transport Workers Union (TWU)	August 2018	1%

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Condensed Statements Of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net income	$ 102,555	$ 72,622
Adjustments to reconcile net income to net cash provided by operations:
Unrealized mark-to-market losses (gains)	0	9,144
Equity-based compensation, net	3,872	2,788
Allowance for doubtful accounts	(33)	156
Amortization of deferred gains and losses	(178)	(324)
Depreciation and amortization	22,465	13,928
Deferred income tax	(395)	5,962
Loss on disposal of assets	865	261
Capitalized interest	(210)	(104)
Changes in operating assets and liabilities:
Accounts receivable	(14,188)	(10,223)
Prepaid maintenance reserves	(14,286)	(16,641)
Long-term deposits and other assets	(27,020)	(36,304)
Accounts payable	(1,462)	(991)
Air traffic liability	64,331	74,374
Other liabilities	7,819	19,612
Net cash provided by operating activities	144,135	134,260
Investing activities:
Pre-delivery deposits for flight equipment, net of refunds	(94,009)	(19,748)
Purchase of property and equipment	(7,430)	(13,816)
Net cash used in investing activities	(101,439)	(33,564)
Financing activities:
Proceeds from options exercised	63	555
Payments on capital lease obligations	(511)	0
Proceeds from sale and leaseback transactions	0	6,900
Payments to pre-IPO shareholders pursuant to tax receivable agreement	(5,643)	0
Excess tax benefits from equity-based compensation	1,225	875
Repurchase of common stock	(1,222)	(937)
Net cash (used in) provided by financing activities	(6,088)	7,393
Net increase in cash and cash equivalents	36,608	108,089
Cash and cash equivalents at beginning of period	530,631	416,816
Cash and cash equivalents at end of period	567,239	524,905
Cash payments for:
Interest	326	17
Taxes	$ 52,093	$ 44,806

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Tax Receivable Agreement

6 Months Ended

Jun. 30, 2014

Tax Receivable Agreement [Abstract]

Tax Receivable Agreement

Tax Receivable Agreement

On June 1, 2011, the Company completed its initial public offering of common stock, or IPO. In connection with the IPO, the Company entered into a Tax Receivable Agreement (TRA) and thereby distributed immediately prior to the completion of the IPO to the holders of common stock as of such time, or the Pre-IPO Stockholders, the right to receive an amount equal to 90% of the cash savings in federal income tax realized by the Company by virtue of the use of the federal net operating loss, deferred interest deductions, and alternative minimum tax credits held by the Company as of March 31, 2011, which is defined as the Pre-IPO NOL. Cash tax savings generally will be computed by comparing the actual federal income tax liability to the amount of such taxes that the Company would have been required to pay had such Pre-IPO NOLs not been available. Upon consummation of the IPO and execution of the TRA, the Company recorded a liability with an offsetting reduction to additional paid-in-capital. The amount and timing of payments under the TRA depends upon a number of factors, including, but not limited to, the amount and timing of taxable income generated in the future and any future limitations that may be imposed on the Company's ability to use the Pre-IPO NOLs. The term of the TRA continues until the first to occur of (a) the full payment of all amounts required under the agreement with respect to utilization or expiration of all the Pre-IPO NOLs, (b) the end of the taxable year including the tenth anniversary of the IPO or (c) a change in control of the Company.

In accordance with the TRA, the Company is required to submit a Tax Benefit Schedule showing the proposed TRA payout amount to the Stockholder Representatives within 45 calendar days after the Company files its tax return. The Stockholder Representatives are Indigo Pacific Partners, LLC and OCM FIE, LLC, who represent the two largest ownership interests of pre-IPO shares. The Tax Benefit Schedule shall become final and binding on all parties unless a Stockholder Representative, within 45 calendar days after receiving such schedule, provides the Company with notice of a material objection to such schedule. If the parties, for any reason, are unable to successfully resolve the issues raised in any notice within 30 calendar days of receipt of such notice, the Company and the Stockholder Representatives shall employ the Reconciliation procedures. If the Tax Benefit Schedule is accepted, the Company has five days after the acceptance to make payments to the pre-IPO shareholders. Pursuant to the TRA's Reconciliation procedures, any disputes that cannot be settled amicably, are settled by arbitration conducted by a single arbitrator jointly selected by both parties.

During the second quarter of 2012, the Company paid $27.2 million, or 90% of the 2011 tax savings realized from the utilization of NOLs, including $0.3 million of applicable interest, to the Pre-IPO Stockholders.

During 2013, the Company filed an amended 2009 income tax return which resulted in a reduction to the estimated TRA liability from $8.0 million to $5.6 million. On September 13, 2013, the Company filed its 2012 federal income tax return, and on October 14, 2013 the Company submitted the Tax Benefit Schedule to the Stockholder Representatives. On November 27, 2013, pursuant to the TRA, the Company received an objection notice to the Tax Benefit Schedule from the Stockholder Representatives. After several unsuccessful attempts at resolving the objections, on April 7, 2014, the Company received a demand for arbitration from the Stockholder Representatives. Prior to commencing arbitration proceedings, on June 17, 2014, the Company and Stockholder Representatives agreed on a settlement amount of $7.0 million in addition to interest of $0.3 million. The agreed upon settlement was in excess of the outstanding liability of $5.6 million at the time of settlement. The excess payment of $1.4 million was recorded within other expense in the statement of operations and recorded as cash from operations in the statement of cash flows. As of June 30, 2014, the Company had made all payments in accordance with the agreed upon settlement terms and had no outstanding obligations related to the TRA.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Under ASC 820, Fair Value Measurements and Disclosures, disclosures are required about how fair value is determined for assets and liabilities, and a hierarchy for which these assets and liabilities must be grouped is established, based on significant levels of inputs, as follows:

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.

Fair value is defined 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 Company utilizes several valuation techniques in order to assess the fair value of the Company’s financial assets and liabilities. The Company's derivative contracts generally consist of jet fuel swaps and jet fuel options. These instruments are valued using energy and commodity market data, which is derived by combining raw inputs with quantitative models and processes to generate forward curves and volatilities.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

Assets and liabilities measured at gross fair value on a recurring basis are summarized below:

	Fair Value Measurements as of June 30, 2014
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	567.2	$	567.2	$	—	$	—
Jet fuel options	0.4		—		—		0.4
Total assets	$	567.6	$	567.2	$	—	$	0.4
Total liabilities	$	—	$	—	$	—	$	—

	Fair Value Measurements as of December 31, 2013
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	530.6	$	530.6	$	—	$	—
Total assets	$	530.6	$	530.6	$	—	$	—
Total liabilities	$	—	$	—	$	—	$	—

Cash and cash equivalents at June 30, 2014 and December 31, 2013 are comprised of liquid money market funds and cash and are categorized as Level 1 instruments. The Company maintains cash with various high-quality financial institutions. The Company had no transfers of assets or liabilities between any of the above levels during the six months ended June 30, 2014 and the year endedDecember 31, 2013.

The Company did not elect hedge accounting on any of the derivative instruments, and as a result, changes in the fair values of these fuel derivative contracts are recorded each period in fuel expense. Fair value of the instruments is determined using standard option valuation models. The Company also considers counterparty risk and its own credit risk in its determination of all estimated fair values. Within the Condensed Balance Sheets, the Company offsets fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. All derivative instruments are presented on a gross basis in the table above.

The Company determines the fair value of jet fuel options utilizing an option pricing model based on inputs that are either readily available in public markets or can be derived from information available in publicly quoted markets. The Company has consistently applied these valuation techniques in all periods presented and believes it has obtained the most accurate information available for the types of derivative contracts it holds.

The fair value of the Company's jet fuel swaps are determined based on inputs that are readily available in public markets or can be derived from information available in publicly quoted markets; therefore, the Company has categorized these instruments as Level 2. Due to the fact that certain inputs utilized to determine the fair value of the Company's jet fuel options are unobservable (principally implied volatility), the Company has categorized these instruments as Level 3.

The Company records the fair value adjustment of its aircraft fuel derivatives in the accompanying statement of operations within aircraft fuel and on the balance sheet within other current assets or other current liabilities, depending on whether the net fair value of the derivatives is in an asset or liability position as of the respective date.

The Company's Valuation Group is made up of individuals from the Company's Risk Management, Treasury and Corporate Accounting departments. The Valuation Group is responsible for the Company's valuation policies, procedures and execution thereof. The Company's Valuation Group reports to the Company's Chief Financial Officer and seeks approval for certain fuel derivative transactions from the Audit Committee. The Valuation Group compares the results of the Company's internally developed valuation methods with counterparty reports at each balance sheet date and assesses the Company's valuation methods for accurateness and identifies any needs for modification.

The following table presents the Company's activity for assets and liabilities measured at gross fair value on a recurring basis using significant unobservable inputs (Level 3):

	Jet Fuel Option Activity for the Three Months Ended June 30, 2014
	(in thousands)
Balance at March 31, 2014	—
Total realized or unrealized gains (losses) included in earnings, net	(467		)
Purchases	827
Sales	—
Settlements, net	—
Balance at June 30, 2014	$	360

	Jet Fuel Option Activity for the Six Months Ended June 30, 2014
	(in thousands)
Balance at December 31, 2013	—
Total realized or unrealized gains (losses) included in earnings, net	(467		)
Purchases	827
Sales	—
Settlements, net	—
Balance at June 30, 2014	$	360

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Financial Instruments and Risk Management - Narrative (Details)	Jun. 30, 2014 gal	Jun. 30, 2014 Fuel [Member] Options Held [Member]	Dec. 31, 2013 Fuel [Member] Future [Member] hedge_contract
Derivative [Line Items]
Anticipated jet fuel consumption protected by hedges (in gallons)	52,500,000
Anticipated jet fuel consumption protected by hedges (as a percent)	50.10%
Derivative contract, weighted average ceiling price (in USD per gallon)		3.25
Number of derivative contracts			0

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured at fair value on a recurring basis

Assets and liabilities measured at gross fair value on a recurring basis are summarized below:

	Fair Value Measurements as of June 30, 2014
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	567.2	$	567.2	$	—	$	—
Jet fuel options	0.4		—		—		0.4
Total assets	$	567.6	$	567.2	$	—	$	0.4
Total liabilities	$	—	$	—	$	—	$	—

	Fair Value Measurements as of December 31, 2013
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	530.6	$	530.6	$	—	$	—
Total assets	$	530.6	$	530.6	$	—	$	—
Total liabilities	$	—	$	—	$	—	$	—

Schedule of assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

The following table presents the Company's activity for assets and liabilities measured at gross fair value on a recurring basis using significant unobservable inputs (Level 3):

	Jet Fuel Option Activity for the Three Months Ended June 30, 2014
	(in thousands)
Balance at March 31, 2014	—
Total realized or unrealized gains (losses) included in earnings, net	(467		)
Purchases	827
Sales	—
Settlements, net	—
Balance at June 30, 2014	$	360

	Jet Fuel Option Activity for the Six Months Ended June 30, 2014
	(in thousands)
Balance at December 31, 2013	—
Total realized or unrealized gains (losses) included in earnings, net	(467		)
Purchases	827
Sales	—
Settlements, net	—
Balance at June 30, 2014	$	360

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Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per common share

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(in thousands, except per share amounts)
Numerator
Net income	$	64,849	$	42,068	$	102,555	$	72,622
Denominator
Weighted-average shares outstanding, basic	72,740		72,593		72,712		72,540
Effect of dilutive stock awards	554		399		562		358
Adjusted weighted-average shares outstanding, diluted	73,294		72,992		73,274		72,898
Net Income per Share
Basic earnings per common share	$	0.89	$	0.58	$	1.41	$	1.00
Diluted earnings per common share	$	0.88	$	0.58	$	1.40	$	1.00
Anti-dilutive weighted-average shares	57		2		56		1

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Subsequent Events

6 Months Ended

Jun. 30, 2014

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On July 22, 2014, the Company executed a contract for the purchase of $13.0 million of rotable inventory to support its aircraft fleet.

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Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of accounting

The accompanying unaudited condensed financial statements include the accounts of Spirit Airlines, Inc. (the Company). These unaudited condensed financial statements reflect all normal recurring adjustments which management believes are necessary to present fairly the financial position, results of operations and cash flows of the Company for the respective periods presented. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission for Form 10-Q. These unaudited interim condensed financial statements should be read in conjunction with the audited financial statements of the Company and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2013 filed with the Securities and Exchange Commission.

Use of estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Recent Accounting Developments

In May 2014, the Financial Accounting Standards Board (the FASB) issued Accounting Standards Update (ASU) No. 2014-09, (ASU 2014-09), "Revenue from Contracts with Customers." The objective of ASU 2014-19 is to establish a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and will supersede most of the existing revenue recognition guidance, including industry-specific guidance. The core principle of ASU 2014-09 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the new guidance, an entity will (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the contract's performance obligations; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. The new guidance is effective for annual reporting periods (including interim periods within those periods) beginning after December 15, 2016 for public companies. Early adoption is not permitted. Entities have the option of using either a full retrospective or modified approach to adopt ASU 2014-09. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements nor decided upon the method of adoption.

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Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2014

Payables and Accruals [Abstract]

Accrued liabilities included in other current liabilities

Other current liabilities as of June 30, 2014 and December 31, 2013 consist of the following:

	June 30, 2014		December 31, 2013
	(in thousands)
Federal excise and other passenger taxes and fees payable	$	36,006	$	26,979
Salaries and wages	28,640		26,174
Aircraft maintenance	23,322		36,165
Airport expenses	17,322		17,109
Fuel	11,037		13,819
Federal and state income tax payable	9,091		794
Aircraft and facility rent	8,605		7,993
Other	12,601		16,229
Other current liabilities	$	146,624	$	145,262

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Tax Receivable Agreement (Details) (USD $)	0 Months Ended		3 Months Ended	6 Months Ended
	Jun. 17, 2014	Jun. 01, 2011	Jun. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 17, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 01, 2011 owner	Mar. 31, 2011
Tax Receivable Agreement [Abstract]
Percentage of cash savings from pre-initial public offering net operating loss due to pre-initial public offering stockholders			90.00%							90.00%
Tax receivable agreement, tax benefit schedule days to submission		45 days
Tax receivable agreement, number of largest owners pre initial public offering									2
Tax receivable agreement, tax benefit schedule days to response		45 days
Tax receivable agreement, tax benefit schedule days to resolve notice		30 days
Tax receivable agreement, tax benefit schedule days to payment after acceptance		5 days
Cash payment including interest to pre-IPO stockholders pursuant to tax receivable agreement			$ 27,200,000	$ 5,643,000	$ 0
Interest included in cash payment to pre-IPO stockholders pursuant to tax receivable agreement			300,000
Estimated remaining cash payment to pre-IPO stockholders						5,600,000	5,600,000	8,000,000
Tax settlement amount	7,000,000
Tax settlement interest	300,000
Excess Tax Payment Resulting From Settlement				$ 1,400,000

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Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Federal excise and other passenger taxes and fees payable	$ 36,006	$ 26,979
Salaries and wages	28,640	26,174
Aircraft maintenance	23,322	36,165
Airport expenses	17,322	17,109
Fuel	11,037	13,819
Federal and state income tax payable	9,091	794
Aircraft and facility rent	8,605	7,993
Other	12,601	16,229
Other current liabilities	$ 146,624	$ 145,262

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Commitments and Contingencies - Sale Leaseback Transactions Aircraft (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014 aircraft
Commitments and Contingencies Disclosure [Abstract]
Number of aircrafts delivered	3
Aircraft [Member]
Sale Leaseback Transaction [Line Items]
Number of aircraft entered into sale and leaseback agreement	3
Sale leaseback transaction on aircraft, net deferred gain (loss)	$ (1.0)
Sale leaseback transaction on aircraft, refund in pre-delivery deposits	$ 16.0

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Basis of Presentation

6 Months Ended

Jun. 30, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited condensed financial statements include the accounts of Spirit Airlines, Inc. (the Company). These unaudited condensed financial statements reflect all normal recurring adjustments which management believes are necessary to present fairly the financial position, results of operations and cash flows of the Company for the respective periods presented. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission for Form 10-Q. These unaudited interim condensed financial statements should be read in conjunction with the audited financial statements of the Company and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2013 filed with the Securities and Exchange Commission.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

The interim results reflected in the unaudited condensed financial statements are not necessarily indicative of the results that may be expected for other interim periods or for the full year.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Aircraft-Related Commitments and Financing Arrangements

The Company’s contractual purchase commitments consist primarily of aircraft and engine acquisitions through manufacturers and aircraft leasing companies. As of June 30, 2014, the Company's aircraft orders consisted of the following:

	Airbus				Third-Party Lessor
	A320	A320NEO	A321	A321NEO	A320NEO	Total
remainder of 2014	8					8
2015	8		6		1	15
2016	3		9		4	16
2017	8		10			18
2018	2	6	5			13
2019		3		10		13
2020		13				13
2021		18				18
	29	40	30	10	5	114

The Company also has six spare engine orders for V2500 SelectOneengines with International Aero Engines (IAE) and nine spare engine orders for PurePower PW1100G-JM engines with Pratt & Whitney. Spare engines are scheduled for delivery from 2014 through 2024. Purchase commitments for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and pre-delivery payments, will be approximately $350 million for the remainder of 2014, $658 million in 2015, $601 million in 2016, $757 million in 2017, $615 million in 2018, and $2,207 million in 2019 and beyond. The Company has secured financing commitments with third parties for four aircraft deliveries from Airbus, scheduled for delivery in 2014. The Company does not have financing commitments in place for the remaining 105 Airbus aircraft currently on firm order scheduled for delivery between the fourth quarter of 2014 through 2021. However, the Company has signed letters of intent to finance the remaining 4 aircraft being delivered in 2014 and the first 11 aircraft being delivered in 2015 under secured debt arrangements.

During the first six months of 2014, the Company took delivery of three aircraft which were financed via sale and leaseback transactions with third-party aircraft lessors. The three sale and leaseback transactions resulted in net deferred losses of $1.0 million. Deferred losses are included in other long-term assets on the accompanying balance sheet. Deferred losses are recognized as an increase to rent expense on a straight-line basis over the term of the respective operating leases. Deferred gains are included in deferred credits and other long-term liabilities on the accompanying balance sheet. Deferred gains are recognized as a decrease to rent expense on a straight-line basis over the term of the respective operating leases. The Company had agreements in place prior to the delivery of these aircraft which resulted in the settlement of the purchase obligation by the lessor and the refund of $16.0 million in pre-delivery deposits from Airbus during the six months ended June 30, 2014. The refunded pre-delivery deposits have been disclosed in the accompanying statements of cash flows as pre-delivery deposits for flight equipment, net of refunds, within investing activities. All leases from these sale and leaseback transactions were accounted for as operating leases. Under the terms of the lease agreements, the Company will continue to operate and maintain the aircraft. Payments under the lease agreements are fixed for the term of the lease. The lease agreements contain standard termination events, including termination upon a breach of the Company's obligations to make rental payments and upon any other material breach of the Company's obligations under the leases, and standard maintenance and return condition provisions. These return provisions are evaluated at inception of the lease and throughout the lease terms and are accounted for as additional rent expense when it is probable that such amounts will be incurred. Upon a termination of the lease due to a breach by the Company, the Company would be liable for standard contractual damages, possibly including damages suffered by the lessor in connection with remarketing the aircraft or while the aircraft is not leased to another party. During the fourth quarter of 2013, the Company entered into an agreement for the lease of two quick engine change kits, classified as capital leases. Payments under the lease agreement are fixed for the three year term of the lease.

Future minimum lease payments under capital leases and noncancellable operating leases with initial or remaining terms in excess of one year at June 30, 2014 were as follows:

			Operating Leases
	Capital Leases		Aircraft and Spare Engine Leases		Property Facility Leases		Operating Lease Obligations
	(in thousands)
remainder of 2014	$	923	$	98,287	$	10,272	$	108,559
2015	1,244		197,137		17,256		214,393
2016	1,044		195,312		11,359		206,671
2017	44		178,811		8,832		187,643
2018	44		155,123		6,445		161,568
2019 and thereafter	12		603,289		24,406		627,695
Total minimum lease payments	$	3,311	$	1,427,959	$	78,570	$	1,506,529
Less amount representing interest	$	324
Present value of minimum lease payments	$	2,987
Less current portion	$	1,324
Long term portion	$	1,663

Aircraft rent expense consists of monthly lease rents for aircraft and spare engines under the terms of the related operating leases and is recognized on a straight-line basis. Aircraft rent expense also includes supplemental rent. Supplemental rent is made up of maintenance reserves paid or to be paid to aircraft lessors in advance of the performance of major maintenance activities that are not probable of being reimbursed, and lease return condition obligations which the Company begins to accrue when they are probable and can be estimated. The Company expects supplemental rent to increase as individual aircraft lease agreements approach their respective termination dates and the Company begins to accrue the estimated cost of return conditions for the corresponding aircraft.

Some of the Company’s master lease agreements provide that the Company pays maintenance reserves to aircraft lessors to be held as collateral in advance of the Company’s required performance of major maintenance activities. Maintenance reserve payments are either contractually fixed or utilization based amounts. Fixed maintenance reserve payments for these aircraft and related flight equipment, including estimated amounts for contractual price escalations, will be approximately $3.7 million for the remainder of 2014, $7.6 million in 2015, $8.0 million in 2016, $7.4 million in 2017, $5.8 million in 2018, and $18.4 million in 2019 and beyond. These lease agreements provide that maintenance reserves are reimbursable to the Company upon completion of the maintenance event in an amount equal to the lesser of (1) the amount of the maintenance reserve held by the lessor associated with the specific maintenance event or (2) the qualifying costs related to the specific maintenance event.

On October 15, 2013, the Company had an aircraft experience an engine failure shortly after takeoff. The aircraft immediately returned to the airport, and the passengers and crew safely disembarked from the aircraft. The airframe and engine incurred damage as a result of the failure. In 2013, the Company expensed the insurance deductible related to this incident of approximately $0.8 million. The Company anticipates it will recover insurance proceeds to cover the expenses related to this incident.

Other

The Company is contractually obligated to pay the following minimum guaranteed payments for its reservation system and advertising media as of June 30, 2014: $1.9 million for the remainder of 2014, $3.9 million in 2015, $3.9 million in 2016, $3.9 million in 2017, $2.6 million in 2018, and none in 2019 and thereafter.

Litigation

The Company is subject to commercial litigation claims and to administrative and regulatory proceedings and reviews that may be asserted or maintained from time to time. The Company believes the ultimate outcome of such lawsuits, proceedings and reviews will not, individually or in the aggregate, have a material adverse effect on its financial position, liquidity or results of operations.

Credit Card Processing Arrangements

The Company has agreements with organizations that process credit card transactions arising from the purchase of air travel, baggage charges, and other ancillary services by customers. As it is standard in the airline industry, the Company's contractual arrangements with credit card processors permit them, under certain circumstances, to retain a holdback or other collateral, which the Company records as restricted cash, when future air travel and other future services are purchased via credit card transactions. The required holdback is the percentage of the Company's overall credit card sales its credit card processors hold to cover refunds to customers if the Company fails to fulfill its flight obligations. If the Company fails to satisfy certain liquidity and other financial covenants, the processing agreements provide the processors the right to require the Company to maintain cash collateral up to approximately 100% of the Company's air traffic liability, which would result in a commensurate reduction of unrestricted cash. As of June 30, 2014 and December 31, 2013, the Company continued to be in compliance with its credit card processing agreements and liquidity and other financial covenant requirements, and the processors were holding back no remittances.

The maximum potential exposure to cash holdbacks by the Company's credit card processors, based upon advance ticket sales and $9 Fare Club memberships as of June 30, 2014 and December 31, 2013, was $265.5 million and $188.6 million, respectively.

Employees

Approximately 59% of the Company’s employees are covered under collective bargaining agreements. The table below sets forth the Company's employee groups and status of the collective bargaining agreements as of June 30, 2014.

Employee Groups	Representative	Amendable Date	Percentage of Workforce
Pilots	Air Line Pilots Association, International (ALPA)	August 2015	24%
Flight Attendants	Association of Flight Attendants (AFA-CWA)	August 2007	34%
Dispatchers	Transport Workers Union (TWU)	August 2018	1%

In December 2013, with the help of the National Mediation Board (NMB), the Company reached a tentative agreement for a five-year contract with the Company's flight attendants. The tentative agreement was subject to ratification by the flight attendant membership. On February 7, 2014, the Company was notified that the flight attendants voted not to ratify the tentative agreement. The Company will continue to work together with the AFA and the NMB with a goal of reaching a mutually beneficial agreement. On July 8, 2014, ramp service agents directly employed by the Company voted to be represented by the International Association of Machinists and Aerospace Workers (IAM). These ramp service agents currently serve 4 of the 55 airports where the Company operates. The Company is in discussions to begin the process of negotiations with the IAM.

The Company is self-insured for health care claims, up to a stop loss amount for eligible participating employees, and qualified dependent medical claims, subject to deductibles and limitations. The Company’s liabilities for claims incurred but not reported are determined based on an estimate of the ultimate aggregate liability for claims incurred. The estimate is calculated from actual claim rates and adjusted periodically as necessary. The Company has accrued $2.2 million and $2.1 million in health care claims as of June 30, 2014 and December 31, 2013, respectively.

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Commitments and Contingencies - Future Minimum Lease Payments Under Noncancelable Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013 leases
Capital Leases, Future Minimum Payments, Net Minimum Payments, Rolling Maturity [Abstract]
Future Minimum Payments Due, Remainder of Fiscal Year	$ 923
Future Minimum Payments Due, 2015	1,244
Future Minimum Payments Due, 2016	1,044
Future Minimum Payments Due, 2017	44
Future Minimum Payments Due, 2018	44
Future Minimum Payments Due, 2019 and thereafter	12
Total minimum lease payments	3,311
Less amount representing interest	324
Present value of minimum lease payments	2,987
Less current portion	1,324
Long term portion	1,663
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Payments Due, Remainder of Fiscal Year	108,559
Future Minimum Payments Due, 2015	214,393
Future Minimum Payments Due, 2016	206,671
Future Minimum Payments Due, 2017	187,643
Future Minimum Payments Due, 2018	161,568
Future Minimum Payments Due, 2019 and thereafter	627,695
Total minimum lease payments	1,506,529
Aircraft and Spare Engine Leases [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Payments Due, Remainder of Fiscal Year	98,287
Future Minimum Payments Due, 2015	197,137
Future Minimum Payments Due, 2016	195,312
Future Minimum Payments Due, 2017	178,811
Future Minimum Payments Due, 2018	155,123
Future Minimum Payments Due, 2019 and thereafter	603,289
Total minimum lease payments	1,427,959
Property Facility Leases [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Payments Due, Remainder of Fiscal Year	10,272
Future Minimum Payments Due, 2015	17,256
Future Minimum Payments Due, 2016	11,359
Future Minimum Payments Due, 2017	8,832
Future Minimum Payments Due, 2018	6,445
Future Minimum Payments Due, 2019 and thereafter	24,406
Total minimum lease payments	$ 78,570
Quick Engine Change Kit [Member]
Capital Leased Assets [Line Items]
Number of Capital Leases		2
Capital Leases of Lessee, Lease Term	3 years

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Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator
Net income	$ 64,849	$ 42,068	$ 102,555	$ 72,622
Denominator
Weighted-average shares outstanding, basic	72,740	72,593	72,712	72,540
Effect of dilutive stock awards (in shares)	554	399	562	358
Adjusted weighted-average shares outstanding, diluted	73,294	72,992	73,274	72,898
Net Income per Share
Basic earnings per common share (in dollars per share)	$ 0.89	$ 0.58	$ 1.41	$ 1.00
Diluted earnings per common share (in dollars per share)	$ 0.88	$ 0.58	$ 1.40	$ 1.00
Anti-dilutive weighted-average shares	57	2	56	1