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, 2012

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	o	Accelerated filer	o
Non-accelerated filer	ý	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 17, 2012:

Class	Number of Shares
Voting Common Stock, $0.0001 par value	70,853,821
Non-Voting Common Stock, $0.0001 par value	1,669,205

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, 2012 and June 30, 2011	1
		Condensed Balance Sheets – June 30, 2012 and December 31, 2011	2
		Condensed Statements of Cash Flows – Six Months Ended June 30, 2012 and June 30, 2011	3
		Notes to Condensed Financial Statements	4
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	15
		Glossary of Airline Terms	26
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	28
	Item 4.	Controls and Procedures	28
Part II. Other Information
	Item 1.	Legal Proceedings	29
	Item 1A.	Risk Factors	29
	Item 6.	Exhibits	30
Signature			31

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,
	2012			2011			2012			2011
Operating revenues:
Passenger	$	211,812		$	180,418		$	391,890		$	333,698
Non-ticket	134,496			95,473			255,913			174,855
Total operating revenue	346,308			275,891			647,803			508,553
Operating expenses:
Aircraft fuel	120,233			107,322			228,958			188,234
Salaries, wages and benefits	53,489			45,173			106,143			88,366
Aircraft rent	36,060			29,081			68,933			56,789
Landing fees and other rents	17,066			13,007			32,180			24,662
Distribution	14,738			13,037			28,939			24,969
Maintenance, materials and repairs	13,558			7,480			23,972			15,538
Depreciation and amortization	3,327			1,691			6,197			3,237
Other operating	32,657			21,826			59,680			42,559
Loss on disposal of assets	33			35			482			35
Special charges	15			2,280			(57		)	2,361
Total operating expenses	291,176			240,932			555,427			446,750
Operating income	55,132			34,959			92,376			61,803
Other (income) expense:
Interest expense	794			9,678			1,334			23,964
Capitalized interest	(794		)	(1,039		)	(1,334		)	(2,076		)
Interest income	(180		)	(71		)	(595		)	(157		)
Other expense	84			76			127			124
Total other (income) expense	(96		)	8,644			(468		)	21,855
Income before income taxes	55,228			26,315			92,844			39,948
Provision for income taxes	20,637			9,398			34,834			15,148
Net income	$	34,591		$	16,917		$	58,010		$	24,800
Net income per share, basic	$	0.48		$	0.41		$	0.80		$	0.73
Net income per share, diluted	$	0.48		$	0.41		$	0.80		$	0.72

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

1

Spirit Airlines, Inc.

Condensed Balance Sheets

(unaudited, in thousands)

	June 30, 2012			December 31, 2011
Assets
Current assets:
Cash and cash equivalents	$	414,977		$	343,328
Accounts receivable, net	24,936			15,425
Deferred income taxes	17,982			20,738
Other current assets	81,668			63,217
Total current assets	539,563			442,708
Property and equipment:
Flight equipment	10,698			4,182
Ground and other equipment	51,365			46,608
Less accumulated depreciation	(30,127		)	(27,580		)
	31,936			23,210
Deposits on flight equipment purchase contracts	84,291			91,450
Prepaid aircraft maintenance to lessors	117,560			120,615
Security deposits and other long-term assets	96,175			67,830
Total assets	$	869,525		$	745,813
Liabilities and shareholders’ equity
Current liabilities:
Accounts payable	28,599			15,928
Air traffic liability	145,085			112,280
Other current liabilities	117,479			98,856
Total current liabilities	291,163			227,064
Long-term deferred income taxes	22,191			12,108
Deferred credits and other long-term liabilities	28,848			39,935
Shareholders’ equity:
Common stock	7			7
Additional paid-in-capital	499,599			496,136
Treasury stock	(985		)	(129		)
Retained earnings (deficit)	28,702			(29,308		)
Total shareholders’ equity	527,323			466,706
Total liabilities and shareholders’ equity	$	869,525		$	745,813

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,
	2012			2011
Net cash provided by operating activities	$	97,420		$	37,902
Investing activities:
Proceeds from sale of property, equipment and slots	9,074			5,537
Pre-delivery deposits for flight equipment, net of refunds	4,738			(20,091		)
Purchase of property and equipment, net	(19,218		)	(7,305		)
Net cash used in investing activities	(5,406		)	(21,859		)
Financing activities:
Proceeds from issuance of common stock	303			171,014
Payments on debt	—			(20,564		)
Proceeds from sale leaseback transactions	5,627			—
Payments to pre-IPO shareholders pursuant to tax receivable agreement	(26,905		)	—
Excess tax benefits from share-based compensation	1,466			—
Repurchase of restricted common stock	(856		)	(757		)
Debt issuance costs	—			8
Net cash provided by (used in) financing activities	(20,365		)	149,701
Net increase in cash and cash equivalents	71,649			165,744
Cash and cash equivalents at beginning of period	343,328			82,714
Cash and cash equivalents at end of period	$	414,977		$	248,458
Supplemental disclosures
Cash payments for:
Interest paid	$	287		$	2,615
Taxes paid	$	21,819		$	187
Non-cash transactions
Exchange of Notes due to related parties for common stock	$	—		$	279,206
Exchange of mandatorily redeemable preferred stock for common stock	$	—		$	81,747
Liability and offsetting reduction to equity recorded related to tax receivable agreement	$	—		$	35,889

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 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.

Certain prior period amounts have been reclassified to conform to the current year's presentation. For the year ended December 31, 2011, long-term deferred income taxes have been broken out separately from deferred credits and other long-term liabilities in the accompanying Condensed Balance Sheets.

2. Recent Accounting Developments

In May 2011, the FASB issued Accounting Standards Update No. 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards (Topic 820)—Fair Value Measurement (ASU 2011-04). This ASU provides a consistent definition of fair value and ensures that the fair value measurement and disclosure requirements are similar between GAAP and International Financial Reporting Standards. ASU 2011-04 changes certain fair value measurement principles and enhances the disclosure requirements particularly for Level 3 fair value measurements. ASU 2011-04 requires public and non-public companies to disclose the unobservable inputs that are significant to the fair value measurement. Public companies are now required to quantitatively disclose the unobservable inputs used in their Level 3 measurements. ASU 2011-04 provides examples of information companies might provide to comply with the disclosure requirements. The requirements include: (1) a description of the group responsible for valuation policies and procedures, to whom the group reports and the types of internal reporting procedures in place (e.g., interaction between the group and risk management or the audit committee to assess fair value measurements); (2) a description of the frequency and methods for calibration, back testing and other testing procedures used to evaluate pricing models; (3) a description of the process for analyzing changes in fair value measurements from period to period; (4) a description of the methods used to evaluate pricing information provided by third-party brokers or pricing services; (5) a description of the methods used to develop and substantiate the unobservable inputs used in a fair value measurement; and (6) a narrative description of the sensitivity of recurring Level 3 fair value measurements to changes in the unobservable inputs used, if changing those inputs would significantly affect the fair value measurement. On January 1, 2012, the Company adopted ASU 2011-04.

The adoption of ASU 2011-04 resulted in qualitative presentation changes to the Company's disclosures related to fair value measurements as disclosed in Note 8. These changes were primarily the addition of discussion regarding the Company's valuation policies and procedures including the frequency of valuation and testing of valuation models as well as the sensitivity of the Company's model to changes in unobservable inputs.

In December 2011, the FASB issued amendments to Accounting Standards Update No. 2011-11, Balance Sheet (Topic 210); Disclosures about Offsetting Assets and Liabilities (ASU 2011-11). The amendments in this update are designed to enhance disclosures by requiring improved information about financial instruments and derivative instruments that are either (a) offset in accordance with certain right to set-off conditions prescribed by current accounting guidance or (b) subject to an enforceable master netting arrangement or similar agreement, irrespective of whether they are offset in accordance with current accounting guidance. The amendments to ASU 2011-11 will be effective for the first interim or annual period beginning on or after January 1, 2013. Management does not expect the adoption of ASU 2011-11 to have a material impact on its financial statements.

4

Notes to Condensed Financial Statements—(Continued)

3. Special Charges

Secondary Offering Costs

On January 25, 2012, certain stockholders of the Company, including affiliates of Oaktree Capital Management and Indigo Partners and certain members of the Company's executive team, sold an aggregate of 12,650,000 shares of common stock in an underwritten public offering (the secondary offering). The Company incurred a total of $1.3 million in costs between 2011 and 2012 related to the January 2012 secondary offering, of which $0.5 million were incurred during the six months ended June 30, 2012, offset by reimbursements from certain selling shareholders of $0.5 million in accordance with the Fourth Amendment to the Second Amended and Restated Investor Rights Agreement. The Company did not receive any proceeds from the sale of shares in the secondary offering.

Initial Public Offering Costs

In June 2011, the Company issued and sold 15,600,000 shares of common stock in its initial public offering (IPO). The Company incurred contract termination costs and fees of $2.3 million in connection with the IPO during the six months ended June 30, 2011, which included $1.8 million paid to Indigo Partners, LLC to terminate its professional services agreement with the Company and $0.5 million paid to three individual, unaffiliated holders of the Company’s subordinated notes.

4. Net Income 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,
	2012		2011		2012		2011
	(in thousands, except per-share amounts)
Numerator
Net income	$	34,591	$	16,917	$	58,010	$	24,800
Denominator
Weighted-average shares outstanding, basic	72,379		41,493		72,336		33,962
Effect of dilutive nonvested stock awards	205		276		206		308
Adjusted weighted-average shares outstanding, diluted	72,584		41,769		72,542		34,270
Net Income per Share
Basic earnings per common share	$	0.48	$	0.41	$	0.80	$	0.73
Diluted earnings per common share	$	0.48	$	0.41	$	0.80	$	0.72

For the three and six months ended June 30, 2012, there was a weighted-average of 40 thousand and 26 thousand anti-dilutive stock awards, respectively, excluded from the computation of diluted earnings per common share. At June 30, 2011, there were no anti-dilutive awards excluded from the computation of diluted earnings per common share.

5

Notes to Condensed Financial Statements—(Continued)

5. Accrued Liabilities

Accrued liabilities included in other current liabilities as of June 30, 2012 and December 31, 2011 consist of the following:

	June 30, 2012		December 31, 2011
	(in thousands)
Federal excise and other passenger taxes and fees payable	$	27,383	$	17,813
Salaries and wages	18,381		17,123
Airport expenses	13,693		10,682
Aircraft maintenance	10,575		7,816
Fuel	10,288		87
Current portion of tax receivable agreement	9,490		27,399
Deferred gain on sale of slots	9,060		—
Aircraft and facility rent	7,096		7,206
Restructuring	234		329
Other	11,279		10,401
Accrued liabilities	$	117,479	$	98,856

Slot Transaction

During June 2012, the Company transferred four permanent air carrier slots at Ronald Reagan National Airport to another airline ("buyer") for $9.1 million in cash, which the Company received in June. Due to FAA regulations, the buyer may not operate the slots until written confirmation of the slot transfer has been received from the FAA. In accordance with FAA's 80% “use or lose” requirements, the Company will continue to operate all four slots through September 6, 2012. Due to the restriction preventing operating use of the slots by buyer, the gain of $9.1 million was fully deferred as of June 30, 2012 and included within other current liabilities on the accompanying balance sheet. The Company expects to recognize a $9.1 million gain in the third quarter of 2012, the period in which the FAA operating restriction lapses and written confirmation of the slot transfer is expected to be received by the buyer from the FAA. 

6. 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, the counterparty credit ratings, and the historical performance of the counterparties relating to hedge 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.

The Company records financial derivative instruments at fair value, which includes an evaluation of the counterparty credit risk. Fair value of the instruments is determined using standard option valuation models.

Management chose not to elect hedge accounting on any derivative instruments during the six months endedJune 30, 2012 and 2011 and, as a result, changes in the fair value of these fuel hedge contracts are recorded each period in aircraft fuel expense.

6

Notes to Condensed Financial Statements—(Continued)

The following table summarizes the components of aircraft fuel expense for the three and six months ended June 30, 2012 and 2011:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in millions)
Into-plane fuel cost	$	116.6	$	107.0	$	227.5	$	192.6
Changes in value and settlements of fuel hedge contracts	3.6		0.3		1.4		(4.3		)
Aircraft fuel expense	$	120.2	$	107.3	$	229.0	$	188.2

During the three months ended June 30, 2012, $3.6 million of net fuel derivative losses were recognized, consisting of realized losses of $2.5 million and unrealized losses of $1.1 million. During the three months ended June 30, 2011, $0.3 million of net fuel derivative losses were recognized, consisting of realized gains of $3.1 million offset by unrealized losses of $3.5 million. During the six months endedJune 30, 2012, $1.4 million of net fuel derivative losses were recognized, consisting of realized losses of $37 thousand and unrealized losses of $1.4 million. During the six months endedJune 30, 2011, $4.3 million of net fuel derivative gains were recognized, consisting of realized gains of $7.2 million offset by unrealized losses of $2.9 million. Changes in the fair value of such derivative contracts were recorded within aircraft fuel expense in the accompanying statements of operations. These amounts include both realized gains and losses and mark-to-market adjustments of the fair value of unsettled derivative instruments at the end of each period.

As of June 30, 2012 and December 31, 2011, the Company had fuel hedges using U.S. Gulf Coast jet fuel collars as the underlying commodity. As of June 30, 2012, the Company had agreements in place to protect 7.5 million gallons, or approximately 19% of its estimated fuel consumption for the third quarter of 2012, at a weighted-average ceiling and floor price of $3.16 and $2.95 per gallon, respectively. As of June 30, 2012, the Company did not have any of these fuel hedges in place for the fourth quarter of 2012 and beyond. As of December 31, 2011, the Company had agreements in place to protect 13.5 million gallons or approximately 9% of its estimated fuel consumption for the twelve months ended December 31, 2012 at a weighted-average ceiling and floor price of $2.99 and $2.81 per gallon, respectively. Additionally, during peak hurricane season (August through October), the Company enters into basis swap agreements using NYMEX Heating Oil indexes to protect the refining price risk between the price of crude oil and the price of refined jet fuel. As of June 30, 2012, the Company had approximately 72% of its August through October 2012 forecasted refining risk protected using these basis swaps.

7. 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, 2012, firm aircraft orders with Airbus consisted of 101 A320 family aircraft (56 of the existing aircraft model and 45 A320 NEOs) and engine orders with International Aero Engines consisted of three spare V2500 IAE International Aero Engines AG engines. Aircraft are scheduled for delivery from 2012 through 2021, and spare engines are scheduled for delivery from 2013 through 2018. Committed expenditures for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and pre-delivery payments, will be approximately $96 million for the remainder of 2012, $323 million in 2013, $348 million in 2014, $520 million in 2015, $510 million in 2016 and $2,955 million in 2017 and beyond.

During the first six months of 2012, the Company entered into sale and leaseback transactions with third-party aircraft lessors for the sale and leaseback of five Airbus A320 aircraft that resulted in deferred losses of $4.9 million, which are included in other long-term assets on the accompanying balance sheet. The deferred losses will be recognized as an increase 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 $27.9 million in pre-delivery deposits from Airbus for the six months endedJune 30, 2012. The refunded pre-delivery deposits have been disclosed in the accompanying statement of cash flows as investing activities within pre-delivery deposits for flight equipment, net of refunds. All of the leases from these sale and leaseback transactions are accounted for as operating leases. Under the terms of the lease agreements, the Company will continue to operate and maintain the aircraft. Rent payments under the lease agreements are fixed for the term of the lease. The lease agreements provide for 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, standard maintenance and return condition provisions, and the payment of

7

Notes to Condensed Financial Statements—(Continued)

maintenance reserves. 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.

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 fees, and other ancillary services by customers. As 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 that its credit card processors hold to cover refunds to customers if the Company fails to fulfill its flight obligations. During 2011, the Company amended its contractual agreements with all of its processors in light of the Company’s improved balance sheet attributable to the Company's IPO and related recapitalization, resulting in the elimination of all required holdbacks. As of June 30, 2012, the Company continued to be in compliance with its credit card processing agreements, resulting in the respective processors holding back $0 of remittances.

Failure to meet certain liquidity covenants would provide the processors the right to reinstate a holdback, resulting in a commensurate reduction of unrestricted cash. 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, 2012 and December 31, 2011, was $159.5 million and $115.2 million, respectively.

Employees

Approximately 53% of the Company’s employees are covered under collective bargaining agreements. The table below sets forth our employee groups and status of the collective bargaining agreements.

Employee Groups	Representative	Amendable Date
Pilots	Air Line Pilots Association, International (ALPA)	August 2015
Flight Attendants	Association of Flight Attendants (AFA-CWA)	August 2007
Dispatchers	Transport Workers Union (TWU)	July 2012

The collective bargaining agreement between the Company and the Company’s pilots represents 21% of the Company’s employees and was executed on August 1, 2010.

The collective bargaining agreement between the Company and the Company’s flight attendants represents approximately 31% of the Company’s employees and became amendable on August 6, 2007. The Company and the union are currently in negotiations to reach a new collective bargaining agreement. The CBA between the Company and its dispatchers represents approximately 1% of the Company’s employees.

The Company is self-insured for health care claims 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 $1.7 million and $2.0 million for health care claims as of June 30, 2012 and December 31, 2011, respectively.

Other

The Company is contractually obligated to pay the following minimum guaranteed payments to the provider of its reservation system as of June 30, 2012: $1.5 million for the remainder of 2012, $3.1 million in 2013, $3.7 million in 2014, $3.7 million in 2015, $3.7 million in 2016 and $6.2 million in 2017 and thereafter.

8

Notes to Condensed Financial Statements—(Continued)

The Company entered into a Tax Receivable Agreement (“TRA”) with the Company's Pre-IPO Stockholders (as defined in the TRA) that became effective immediately prior to the consummation of the IPO. In accordance with the TRA, the Company paid $27.2 million, including $0.3 million of applicable interest, in the second quarter of 2012. See Note 10.

8. 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 fuel derivative contracts, which primarily consist of costless collar contracts, 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 fair value on a recurring basis are summarized below:

	Fair Value Measurements as of June 30, 2012
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	415.0	$	415.0	$	—	$	—
Basis swaps	0.3		—		—		0.3
Option contracts	0.1		—		—		0.1
Total assets	$	415.4	$	415.0	$	—	$	0.4
Option contracts	$	1.4	$	—	$	—	$	1.4
Total liabilities	$	1.4	$	—	$	—	$	1.4

	Fair Value Measurements as of December 31, 2011
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	343.3	$	343.3	$	—	$	—
Option contracts	1.0		—		—		1.0
Total assets	$	344.3	$	343.3	$	—	$	1.0
Option contracts	$	0.7	$	—	$	—	$	0.7
Total liabilities	$	0.7	$	—	$	—	$	0.7

9

Notes to Condensed Financial Statements—(Continued)

Cash and cash equivalents at June 30, 2012 and December 31, 2011 are comprised of liquid money market funds and cash. 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 endedJune 30, 2012 and the year ended December 31, 2011.

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 hedge contracts are recorded each period in fuel expense. Fair values of the instruments are 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. The Company offsets fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. The Company determines the fair value of fuel derivative option contracts 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.

Due to the fact that certain inputs utilized to determine the fair value of aircraft fuel derivatives are unobservable (principally implied volatility), the Company has categorized these derivatives as Level 3. Implied volatility of an option contract is the volatility of the price of the underlying that is implied by the market price of the option based on an option pricing model. Thus, it is the volatility that, when used in a particular pricing model, yields a theoretical value for the option equal to the current market price of that option. Implied volatility, a forward-looking measure, differs from historical volatility because the latter is calculated from known past returns. At each balance sheet date, the Company substantiates and adjusts unobservable inputs. The Company routinely assesses the valuation model's sensitivity to changes in implied volatility. Based on the Company's assessment of the valuation model's sensitivity to changes in implied volatility, it noted that holding other inputs constant, a significant increase (decrease) in implied volatility would result in a significantly higher (lower) determination of fair value measurement for the Company's aircraft fuel derivatives.

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 Audit Committee who approve all derivative transactions. 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 fair value on a recurring basis using significant unobservable inputs (Level 3):

	Fuel Derivative Activity for Six Months Ended June 30, 2012
	(in millions)
Balance at December 31, 2011	$	0.3
Total gains (losses) realized or unrealized included in earnings, net	2.2
Settlements, net	(2.4		)
Balance at March 31, 2012	$	0.1
Total gains (losses) realized or unrealized included in earnings, net	(3.6		)
Settlements, net	2.5
Balance at June 30, 2012	$	(1.0	)

Total losses during the three months endedJune 30, 2012, included in earnings, attributable to the change in unrealized gains or losses related to aircraft fuel derivatives still held by the Company were $0.9 million. The Company records the fair value 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 balance sheet date.

The Company did not have any outstanding debt as of June 30, 2012 or December 31, 2011.

10

Notes to Condensed Financial Statements—(Continued)

9. Stock-Based Compensation

The Company has stock plans under which directors, officers, key employees, and consultants of the Company may be granted restricted stock awards, stock options and other equity-based instruments as a means of promoting the Company’s long-term growth and profitability. The plans are intended to encourage participants to contribute to and participate in the success of the Company.

The Company's board of directors adopted, and the Company's stockholders approved, the Amended and Restated 2005 Incentive Stock Plan, or the 2005 Stock Plan, effective January 1, 2008. The total number of shares of common stock authorized for issue pursuant to awards granted under the 2005 Stock Plan was 2,500,000 shares. The 2005 Stock Plan provided for the grant of non-qualified stock options, stock appreciation rights, restricted stock, performance shares, phantom stock, restricted stock units and other awards that are valued in whole or in part by reference to our stock.

On May 9, 2011, the Company's board of directors adopted, and the Company's stockholders approved, the 2011 Equity Incentive Award Plan, or 2011 Plan. Under the 2011 Plan, 3,000,000 new shares of common stock are reserved for issuance pursuant to a variety of stock-based compensation awards, including stock options, stock appreciation rights or SARs, restricted stock awards, restricted stock unit awards, deferred stock awards, dividend equivalent awards, stock payment awards and performance share awards and other stock-based awards, plus the number of shares remaining available for future awards under our 2005 Stock Plan. The number of shares reserved for issuance or transfer pursuant to awards under the 2011 Plan will be increased by the number of shares represented by awards outstanding under our 2005 Stock Plan that are forfeited or lapse unexercised and which, following the effective date of the 2011 Plan, are not issued under the 2005 Stock Plan. No further awards will be granted under the 2005 Stock Plan, and all outstanding awards will continue to be governed by their existing terms. As of June 30, 2012 and December 31, 2011, 2,794,172 and 3,336,614 shares of the Company’s common stock, respectively, remained available for future issuance under the 2011 Plan.

Restricted stock awards are valued at the fair value of the shares on the date of grant if vesting is based on a service or a performance condition. Granted shares vest 25% per year on each anniversary of issuance. Compensation expense is recognized on a straight-line basis over the requisite service period.

Restricted stock unit awards are valued at the fair value of the shares on the date of grant if vesting is based on a service or a performance condition. Granted units vest 25% per year on each anniversary of issuance. Each restricted stock unit represents the right to receive one share of common stock upon vesting of such restricted stock unit. Compensation expense is recognized on a straight-line basis over the requisite service period.

Stock option awards are granted with an exercise price equal to the fair market value of the Company’s common stock at the date of grant, vest over four years of continuous service, and have 10-year contractual terms. The fair value of each stock option award is estimated on the date of grant using the Black Scholes model. There were no options granted during the first two quarters of 2012 or 2011. Expected volatilities are based on the historical volatility of a group of peer entities within the same industry. The expected term of options is based upon the simplified method, which represents the average of the vesting term and the contractual term. The risk-free interest rate is based on U.S. Treasury yields for securities with terms approximating the expected term of the option.

To the extent a market price was not available, the fair value of the Company’s common stock was estimated using a discounted cash flow analysis and market multiples, based on management’s estimates of revenue, driven by assumed market growth rates, and estimated costs as well as appropriate discount rates. These estimates are consistent with the plans and estimates management uses to manage the Company’s business. Share-based compensation cost is included within salaries, wages and benefits in operating expenses in the accompanying statements of operations and amounted to $1.7 million and $0.2 million for the six months endedJune 30, 2012 and 2011, respectively. During the six months endedJune 30, 2012 and 2011, there was no tax benefit recognized in income.

11

Notes to Condensed Financial Statements—(Continued)

A summary of share option activity under the 2011 Plan as of June 30, 2012 and changes during the six months endedJune 30, 2012 are presented below:

	Number of Shares		Weighted- Average Exercise Price ($)	Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2011	312,000		9.33	8.9	1,946
Granted	—		—
Exercised	(39,125	)	7.80
Forfeited or expired	(3,625	)	7.80
Outstanding at June 30, 2012	269,250		9.58	8.4	2,661
Exercisable at June 30, 2012	55,125		8.43	8.1	608
Vested or expected to vest at June 30, 2012	256,204		9.54	8.4	2,541

The total intrinsic value of share options exercised during the six months endedJune 30, 2012 was $0.5 million.

A summary of the status of the Company’s restricted stock shares (restricted stock awards and restricted stock unit awards) as of June 30, 2012, and changes during the six months endedJune 30, 2012:

	Number of Shares		Weighted-Average Grant Date Fair Value ($)
Outstanding at December 31, 2011	271,999		1.43
Granted	298,692		20.29
Vested	(164,515	)	3.04
Forfeited	(15,125	)	3.79
Outstanding at June 30, 2012	391,051		15.07

There were 298,692 restricted stock units granted during the six months endedJune 30, 2012 and none during the year ended 2011. The total fair value of restricted stock shares vested during the six months endedJune 30, 2012 and 2011 was $3.3 million and $2.2 million, respectively.

As of June 30, 2012 and June 30, 2011, there was $6.3 million and $1.7 million, respectively, of total unrecognized compensation cost related to nonvested restricted stock and options granted under the plan expected to be recognized over a weighted-average period of 3.3 years and 2.5 years, respectively.

Performance Share Awards

During the six months ended June 30, 2012, the Company granted certain senior-level executives restricted stock units that vest based on market and service conditions as part of a long-term incentive plan, which are referred to herein as performance share awards. The number of shares of common stock underlying each award is determined at the end of a three-year performance period. In order to vest, the senior level executive must still be employed by the Company, with certain contractual exclusions, at the end of the performance period. At the end of the performance period, the percentage of the stock units that will vest will be determined by ranking the Company’s total shareholder return compared to the total shareholder return of twelve peer companies. Based on the level of performance, between 0% and 200% of the award may vest. Within 60 days after vesting, the shares underlying the award will be issued to the participant. In the event of a change in control of the Company or the disability or death of a participant, the payout of any award is limited to a prorated portion of such award based upon a performance assessment prior to the change-in-control date or date of disability or death.

The market condition requirements are reflected in the grant date fair value of the award, and the compensation expense for the award will be recognized assuming that the requisite service is rendered regardless of whether the market conditions are achieved.

12

Notes to Condensed Financial Statements—(Continued)

The grant date fair value of the performance share awards was determined through the use of a Monte Carlo simulation model, which utilizes multiple input variables that determine the probability of satisfying the market condition requirements applicable to each award as follows:

	Weighted-Average at Grant Date
Expected volatility factor	0.39
Risk free interest rate	0.45	%
Expected term (in years)	2.75
Expected dividend yield	—	%

At the time of the Performance Share Award grants, the Company had been public for less than one year; as such, the volatility was based upon a weighted average of the volatility for the Company and the most recent 2.75-year volatility of its peers. The peer group used to calculate volatility is consistent with the group used for the traditional employee stock options. The Company chose to use historical volatility to value these awards because historical stock prices were used to develop the correlation coefficients between the Company and each of the peer companies within the peer group in order to model stock price movements. The volatilities used were calculated over the most recent 2.75-year period, which was the remaining term of the performance period at the date of grant. The risk-free interest rate was based on the implied yield available on U.S. Treasury zero-coupon issues with remaining terms equivalent to the remaining performance period. The Company does not intend to pay dividends on its common stock in the foreseeable future. Accordingly, the Company used a dividend yield of zero in its model.

The following table summarizes the Company’s performance share awards for the six months endedJune 30, 2012:

	Number of Awards	Weighted-Average Fair Value at Grant Date
Outstanding at December 31, 2011	—	$	—
Granted	262,500	32.26
Vested	—	—
Forfeited	—	—
Outstanding at June 30, 2012	262,500	32.26

As of June 30, 2012, there was $7.8 million of total unrecognized compensation cost related to performance share awards. The unrecognized cost is expected to be recognized over 2.51 years.

10. Initial Public Offering and Tax Receivable Agreement

On June 1, 2011, the Company raised $187.2 million of gross proceeds from an initial public offering of 15,600,000 shares of its common stock at a price of $12.00 per share. The resulting proceeds to the Company were approximately $176.9 million, after deducting underwriter commissions. The Company retained $150.0 million of the net proceeds, after paying $20.6 million of debt, $450,000 to pay three unaffiliated holders of its subordinated notes, and $5.9 million in direct costs of the offering. In accordance with a Recapitalization Agreement, all of the principal and accrued and unpaid interest on outstanding notes, to the extent not paid, totaling $279.2 million, as well as all of the Class A and B Preferred Stock outstanding immediately prior to the offering along with accrued and unpaid dividends totaling $81.7 million, were exchanged for 30,079,420 shares of common stock at a share price of $12.00 per share. Each share of Class B Common Stock was exchanged for one share of common stock. In addition, interest expense was reduced by $0.4 million due to a write off of the unamortized portion of prepaid loan fees and deferred interest.

The Company entered into the TRA with the Company's Pre-IPO Stockholders (as defined in the TRA) that became effective immediately prior to the consummation of the IPO. Under the TRA, the Company is obligated to pay to the Pre-IPO Stockholders an amount equal to 90% of the cash savings in federal income tax realized by it 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. Cash tax savings generally will be computed by comparing 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 (as defined in the TRA) 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.

13

Notes to Condensed Financial Statements—(Continued)

The term of the TRA will continue 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 of 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. The amount and timing of payments under the TRA will depend 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 Company paid $27.2 million, or 90% of the tax savings realized from the utilization of NOLs in 2011, including $0.3 million of applicable interest in 2012 related to the TRA. As of June 30, 2012, an estimated remaining cash benefit of $9.5 million is expected to be paid to our Pre-IPO Stockholders under the terms of the TRA in 2013.

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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. 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, Inc., headquartered in Miramar, Florida, is an ultra low-cost, low-fare airline that provides affordable travel opportunities within the United States, the Caribbean and Latin America. Our all-Airbus fleet currently operates more than 200 daily flights to over 50 destinations. We completed an initial public offering during the second quarter of 2011, and our stock trades on the Nasdaq Global Select Stock Market under the symbol “SAVE.”

Our ultra low-cost carrier, or ULCC, business model allows us to compete principally through offering low base fares. Our business strategy empowers customers to save money on air travel by offering ultra low base fares with a range of optional services for a fee, allowing customers the freedom to choose 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 for additional fees (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 have reduced our unit operating costs significantly since redefining Spirit as a ULCC in 2007. As a result, our operating cost structure is among the lowest in the Americas, enabling us to offer very low fares in the markets we serve while delivering operating profitability.

Our goal is to offer compelling value to our customers by utilizing our low-cost structure to offer ultra low fares and an unbundled pricing strategy which stimulates customer demand and supports profitable growth. We target large markets where fares are high and we believe we can lower the existing fare by 25% or more while achieving our targeted returns. We believe there are hundreds of routes meeting this criteria that we do not currently serve which provide us many profitable expansion opportunities.

As part of our strategy, we seek to improve profitability by offering optional services which generate ancillary revenue in excess of any associated increase in our costs. When this occurs, our CASM may increase without materially adversely affecting our results of operations due to the corresponding related revenue. In addition, our CASM will vary inversely with our average stage length due to some operating costs, such as airport facilities and landing fees, being fixed regardless of the stage length. Our average stage length also will vary with the routes we elect to fly and was shorter in the first six months of 2012 than the prior year period as we added service on a number of domestic routes with shorter stage lengths, resulting in upward pressure on CASM. Our fare pricing strategy is designed to take into account the costs incurred on each particular route and targeted returns.

15

Comparative Operating Statistics:

The following tables set forth our operating statistics for the three-month and six-month periods ended June 30, 2012 and 2011:

	Three Months Ended June 30,		Percent Change
	2012	2011
Operating Statistics:
Available seat miles (ASMs) (thousands)	2,826,916	2,425,642	16.5	%
Revenue passenger miles (RPMs) (thousands)	2,397,663	2,083,804	15.1	%
Load factor (%)	84.8	85.9	(1.1) pts
Passenger flight segments (thousands)	2,613	2,200	18.8	%
Block hours	48,147	41,815	15.1	%
RASM (cents)	12.25	11.37	7.7	%
Average yield (cents)	14.44	13.24	9.1	%
Average ticket revenue per passenger flight segment ($)	81.06	82.00	(1.1	)%
Average non-ticket revenue per passenger flight segment ($)	51.47	43.39	18.6	%
Total revenue per passenger flight segment ($)	132.53	125.39	5.7	%
CASM (cents)	10.30	9.93	3.7	%
Adjusted CASM (cents)	10.26	9.70	5.8	%
Adjusted CASM ex fuel (cents)	6.05	5.41	11.8	%
Fuel gallons consumed (thousands)	35,829	31,264	14.6	%
Average economic fuel cost per gallon ($)	3.32	3.32	—	%
Aircraft at end of period (1)	42	35	20.0	%
Average aircraft	41.0	35.0	17.1	%
Average daily aircraft utilization (hours)	12.9	13.1	(1.5	)%
Average stage length (miles)	902	932	(3.2	)%
Airports served in the period	51	45	13.3	%

(1)    Count excludes one wet-leased aircraft by the Company, for which the lease commenced on June 11, 2012

and is expected to run through August 11, 2012.

16

	Six Months Ended June 30,		Percent Change
	2012	2011
Operating Statistics:
Available seat miles (ASMs) (thousands)	5,415,930	4,625,739	17.1	%
Revenue passenger miles (RPMs) (thousands)	4,592,013	3,931,084	16.8	%
Load factor (%)	84.8	85.0	(0.2) pts
Passenger flight segments (thousands)	4,962	4,063	22.1	%
Block hours	92,620	79,965	15.8	%
RASM (cents)	11.96	10.99	8.8	%
Average yield (cents)	14.11	12.94	9.0	%
Average ticket revenue per passenger flight segment ($)	78.97	82.14	(3.9	)%
Average non-ticket revenue per passenger flight segment ($)	51.57	43.04	19.8	%
Total revenue per passenger flight segment ($)	130.54	125.18	4.3	%
CASM (cents)	10.26	9.66	6.2	%
Adjusted CASM (cents)	10.22	9.54	7.1	%
Adjusted CASM ex fuel (cents)	6.02	5.54	8.7	%
Fuel gallons consumed (thousands)	68,559	59,436	15.3	%
Average economic fuel cost per gallon ($)	3.32	3.12	6.4	%
Aircraft at end of period (1)	42	35	20.0	%
Average aircraft	39.6	34.3	15.5	%
Average daily aircraft utilization (hours)	12.9	12.9	—	%
Average stage length (miles)	907	946	(4.1	)%
Airports served in the period	51	45	13.3	%

(1)    Count excludes one wet-leased aircraft by the Company, for which the lease commenced on June 11, 2012

and is expected to run through August 11, 2012.

Executive Summary

For the second quarter of 2012, we achieved a 15.9% operating margin, up 3.2 points compared to the prior year period. We generated pre-tax earnings of $55.2 million and net earnings of $34.6 million on operating revenues of $346.3 million. For the second quarter of 2011, we generated pre-tax earnings of $26.3 million and net earnings of $16.9 million on operating revenues of $275.9 million, and achieved an 12.7% operating margin. The increase in our second quarter 2012 earnings are a result of our increased capacity due to strong demand for our low fares, and continued growth in our ancillary products.

For the six months ended June 30, 2012, we achieved a 14.3% operating margin, up 2.1 points compared to the prior year period despite a 6.4%increase in the average economic fuel cost per gallon year-over-year. We generated pre-tax earnings of $92.8 million and net earnings of $58.0 million on operating revenues of $647.8 million. For the six months ended June 30, 2011, we generated pre-tax earnings of $39.9 million and net earnings of $24.8 million on operating revenues of $508.6 million, and achieved an 12.2% operating margin. In June 2011, in connection with the IPO and recapitalization, we paid down or exchanged for common stock all of our outstanding notes and preferred stock. Results for the six months ended June 30, 2011 include recognition of $24.0 million of interest expense primarily related to the notes and preferred stock outstanding during the period prior to the IPO and recapitalization. As of June 30, 2012, we had unrestricted cash of $415.0 million.

Cost per available seat mile excluding fuel, restructuring and termination costs and loss on disposal of assets (“Adjusted CASM ex fuel”) for the second quarter 2012 was 6.05 cents, a 11.8%increase year-over-year, and was 6.02 cents for the six months ended June 30, 2012, an 8.7%increase year-over-year. Our average stage length for the second quarter ended June 30, 2012decreased by 3.2% compared to the second quarter of 2011 and decreased by 4.1% for the six months ended June 30, 2012, contributing to the year-over-year increase in Adjusted CASM ex fuel. In addition, we had increased aircraft rent related to a short-term lease agreement with a third-party aircraft provider (wet leased aircraft) to maintain desired capacity during the summer months, higher maintenance expense as a result of our seat maintenance program and hail storm damage in the second quarter of 2012, as well as higher other operating expenses related to costs incurred to re-accommodate passengers due to higher than normal flight cancellations in the second quarter of 2012.

17

As of June 30, 2012, we had 42 Airbus A320-family aircraft in our fleet consisting of 26 A319s, 14 A320s and two A321s (excluding the one wet-leased aircraft). With the scheduled delivery of two A320s in the fourth quarter, we expect to end 2012 with 44 aircraft in the fleet. All of our current aircraft are under operating leases.

Comparison of three months ended June 30, 2012 to three months ended June 30, 2011

Revenue

Operating revenue increased $70.4 million, or 25.5%, to $346.3 million in the second quarter of 2012 as we increased traffic by 15.1% and improved our yield by 9.1% to 14.44 cents.

Our second quarter 2012 results were driven by a 16.5% increase in ASMs on strong demand, as evidenced by our load factor of 84.8% and 9.1%increase in average yield. We continued to generate demand for our fares by lowering our average ticket fare per passenger flight segment to $81.06 or by 1.1% compared to the prior year period while increasing our non-ticket revenue per passenger flight segment from $43.39 to $51.47 (an 18.6%increase) versus the same period last year. Total revenue per passenger flight segment increased 5.7% from $125.39 per passenger flight segment in the second quarter of 2011 to $132.53 in the second quarter of 2012.

We experienced a 40.9% increase in non-ticket revenues in the second quarter of 2012 compared to the second quarter of 2011, reflecting the continued optimization of ancillary revenues and aided by an 18.8%increase in passenger flight segments compared to the prior year. Ancillary revenue represented 38.8% of total revenue in the second quarter of 2012 compared to 34.6% in the second quarter of 2011.

Operating Expenses

Operating expense increased by $50.2 million for the second quarter of 2012 compared to the prior year period primarily due to higher fuel and other direct expenses as a result of our 16.5% capacity growth.

Fuel, our largest operating cost as a percentage of operating expenses, increased due to a 14.6%increase in fuel gallons consumed as a result of block hours increasing 15.1% year-over-year. Aircraft fuel expense includes both into-plane expense (defined below) plus the effect of mark-to-market adjustments to our portfolio of derivative instruments, which is a component of aircraft fuel expense. Into-plane fuel expense is defined as the price that we generally pay at the airport, or the “into-plane” price, including taxes and fees. Into-plane fuel prices are affected by the global oil market and refining costs, 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 the six months endedJune 30, 2012 and 2011 and, as a result, changes in the fair value of these fuel hedge contracts are recorded each period in aircraft fuel expense.

Aircraft fuel expense for the second quarter of 2012 increased $12.9 million, or 12.0%, compared to the second quarter of 2011. The elements of the changes are illustrated in the following table:

	Three Months Ended June 30,					Percent Change
	2012		2011
	(in thousands, except per-gallon amounts)
Into-plane fuel expense	$	116,622	$	106,984		9.0	%
Cash paid (received) from settled derivatives, net of cash settlements paid	2,488		(3,119		)	(179.8	)%
Economic fuel expense	119,110		103,865			14.7	%
Impact on fuel expense from unrealized (gains) and losses arising from mark-to-market adjustments to our outstanding fuel derivatives	1,123		3,457			(67.5	)%
Aircraft fuel expense (per Statement of Operations)	$	120,233	$	107,322		12.0	%
Fuel gallons consumed	35,829		31,264			14.6	%
Economic fuel cost per gallon	$	3.32	$	3.32		—	%
Into-plane fuel cost per gallon	$	3.26	$	3.42		(4.7	)%

18

Our fuel purchasing is largely concentrated in the southeast United States with Fort Lauderdale being the highest volume fueling point in our system. Gulf Coast Jet indexed fuel is the basis for a substantial majority of our fuel consumption. The into-plane fuel cost per gallon decreased 4.7% as a result of lower Gulf Coast jet fuel prices. Gulf Coast jet fuel prices are 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.

We evaluate economic fuel expense, which we define as into-plane fuel expense plus or minus the cash we paid or received from hedge counterparties for expiring positions that we settle during the relevant period, including hedges that we terminate early during the period. The key difference between aircraft fuel expense and economic fuel expense is unrealized mark-to-market changes. When we refer to economic fuel expense, we include realized gains or losses only when they are settled through a cash payment to or from our derivative contract counterparties for those contracts that were settled during the period. We believe this 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 for our operations. Accordingly, many industry analysts evaluate airline results using this measure and it is used in our internal management reporting. Total net loss recognized for hedges that settled during the second quarter of 2012 was $2.5 million, compared to a net benefit of $3.1 million in the prior year period. These amounts represent the net cash received for the settlement of hedges.

As of June 30, 2012, we had fuel hedges using Gulf Coast jet fuel collars in place for approximately 19% of our estimated fuel consumption for the third quarter of 2012. Additionally, during peak hurricane season (August through October), we enter into basis swap agreements using NYMEX Heating Oil indexes to protect the refining price risk between the price of crude oil and the price of refined jet fuel. As of June 30, 2012, we had approximately 72% of our August through October forecasted refining risk protected using these basis swaps.

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, 2012 and 2011 followed by explanations of the material changes on a unit cost basis and/or dollar basis:

	Three Months Ended June 30,		Per-ASM Change		Percent Change
	2012	2011
	(in cents, except for percentages)
Aircraft fuel	4.25	4.42	(0.17	)	(3.8	)%
Salaries, wages and benefits	1.89	1.86	0.03		1.6	%
Aircraft rent	1.28	1.20	0.08		6.7	%
Landing fees and other rents	0.60	0.54	0.06		11.1	%
Distribution	0.52	0.54	(0.02	)	(3.7	)%
Maintenance, materials and repairs	0.48	0.31	0.17		54.8	%
Depreciation and amortization	0.12	0.07	0.05		71.4	%
Other operating	1.16	0.90	0.26		28.9	%
Loss on disposal of assets	—	—	—		N/A
Special Charges	—	0.09	(0.09	)	N/A
CASM	10.30	9.93	0.37		3.7	%
Adjusted CASM (1)	10.26	9.70	0.56		5.8	%
Adjusted CASM ex fuel (2)	6.05	5.41	0.64		11.8	%

(1) Excludes mark-to-market losses of less than 0.01 cents and losses of 0.14 cents per ASM for the three months ended June 30, 2012 and 2011, respectively.

(2) Excludes all components of fuel expense, including realized and unrealized mark-to-market gains and losses.

Our Adjusted CASM ex fuel for the second quarter of 2012 was up 11.8% as compared to the same period in 2011. Our average stage length for the second quarter ended June 30, 2012decreased by 3.2% compared to the second quarter of 2011, contributing to the year-over-year increase in Adjusted CASM ex fuel. In addition, we had increased maintenance costs related to our seat maintenance program and hail storm damage incurred in the quarter and increased rent expense due to additional rental cost associated with a wet-leased aircraft. We also had higher other operating expenses driven by higher average ground handling rates, increased volume of crew hotel rooms related to the expanded scope of our network and increased crew training, as well as higher costs associated with passenger re-accommodations related to flight cancellations.

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Labor costs increased 18.4% on an absolute dollar basis during the second quarter of 2012 or 1.6% on a per-unit basis. Our labor cost increases were primarily driven by increases in our pilot, flight attendant and airport service personnel. The introduction of seven new aircraft since the second quarter of 2011, and the opening of six new airport stations, as well as a route expansion in the second quarter of 2012, drove a 25% increase in crew headcount. In addition, we incurred $1.4 million in incremental share-based compensation, recorded within salaries, wages and benefits in the second quarter of 2012 as compared to the prior year, which contributed to total salaries outpacing our ASM growth on a per unit basis.

Landing fees and other rents increased 31.2% on an absolute dollar basis during the second quarter of 2012 or 11.1% on a per-unit basis as a result of increased volume at higher cost airports. In addition, facility rent increased as a result of an additional six airports served period over period. 

We took delivery of seven Airbus A320 aircraft subsequent to the second quarter of 2011. These aircraft were acquired through sale and leaseback transactions and accounted for the majority of the $7.0 million of rent increase in the second quarter ended 2012. In addition, aircraft rent on a per-unit basis increased due to $1.2 million of additional aircraft rent expense incurred in the second quarter of 2012 related to a short-term lease agreement with a third-party provider (wet-leased aircraft) to maintain desired capacity during the summer months.

The increase in distribution costs on an absolute dollar basis is primarily due to increased volume in addition to an increase of approximately 6.0 percentage points year-over-year in the percentage of sales from third-party travel agents, which are more expensive than selling directly through our website. This shift in distribution mix did not materially affect operating income because the revenues received from sales through third-party travel agents are designed to at least offset the associated incremental costs.

Maintenance costs for the second quarter of 2012 increased by $6.1 million on an absolute dollar basis compared to the prior year period or 54.8% on a per-ASM basis. The increase in maintenance costs is primarily due to the start-up of the seat maintenance program introduced in the first quarter of 2012, which contributed $3.1 million in maintenance costs in the second quarter of 2012. We expect to spend an additional $4.5 million in the second half of 2012 to complete the start-up phase of the seat maintenance program on our entire fleet of aircraft. We do not expect the ongoing expense of our seat maintenance program to have a material impact on our overall future maintenance cost outlook. In addition, damage to aircraft due to a hail storm contributed $0.9 million in maintenance costs in the second quarter of 2012. The average age of our fleet increased to 4.6 years as of June 30, 2012 from 4.2 years as of June 30, 2011. Maintenance expense is expected to increase significantly as our fleet continues to age, resulting in the need for additional repairs over time.

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. The amortization of heavy maintenance costs was $1.8 million and $0.5 million for the second quarters of 2012 and 2011, 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 $15.4 million and $7.9 million for the second quarters of 2012 and 2011, respectively.

Depreciation and amortization increased by $1.6 million primarily due to deferred heavy aircraft maintenance events, which in turn resulted in higher amortization expense recorded in the second quarter of 2012 compared to the prior year period.

Other operating expense for the second quarter of 2012increased by 28.9% on a per-ASM basis and $10.8 million year-over-year on an absolute dollar basis. Increases in departures of 17.9% and overall increased rates at the airports we serve resulted in increases in variable operating costs such as ground handling expenses and travel and lodging expense in the second quarter of 2012 compared to the prior year period. The increase in travel and lodging costs was driven by both volume and hotel rate increases associated with increased training and scope of operations. We also experienced higher costs associated with passenger re-accommodation related to a greater percentage of flight cancellations during the second quarter of 2012.

Special charges decreased $2.3 million in the second quarter of 2012 compared to the prior year period due the recognition of contract termination costs and fees of $2.3 million in connection with our IPO during the second quarter of 2011, which included $1.8 million paid to Indigo Partners, LLC to terminate its professional services agreement with us and $0.5 million paid to three individual, unaffiliated holders of our subordinated notes.

Other income (expenses)

Interest expense decreased by $8.9 million due to the elimination of all debt on June 1, 2011 as a result of our IPO and recapitalization. Interest expense and corresponding capitalized interest in the second quarter of 2012 mostly relates to interest charged by Airbus on deferred pre-delivery deposits and interest related to the TRA.

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Income Taxes

Our effective tax rate for the second quarter of 2012 was 37.4% compared to 35.7% in the second quarter of 2011. In arriving at these rates, we considered a variety of factors, including our forecasted full-year pretax results, the U.S. federal rate of 35%, expected nondeductible expenses and estimated state income taxes. During the first two months of the second quarter of 2011, we had not yet completed our IPO and recapitalization and therefore could not factor the effects of such transactions into our forecasted full-year pretax results, which resulted in an increase in nondeductible expenses forecasted for the full year and adversely affected our tax rate. 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 pretax income and the magnitude of any nondeductible expenses in relation to that pretax income.

Comparison of six months endedJune 30, 2012 to six months endedJune 30, 2011

Revenue

Operating revenue increased $139.3 million, or 27.4%, to $647.8 million in the six months endedJune 30, 2012 compared to the prior-year period as we increased traffic by 16.8% and improved our yield by 9.0% to 14.11 cents.

Our results for the six months endedJune 30, 2012 were driven by a 17.1%increase in ASMs, strong demand, and a network reorientation in mid-2011 that added capacity in Dallas-Fort Worth, Chicago and Las Vegas. We generated greater demand by lowering our average ticket fare per passenger flight segment to $78.97 or by 3.9% compared to the prior year period while increasing our non-ticket revenue per passenger flight segment from $43.04 to $51.57 (a 19.8%increase) versus the same period last year. Total revenue per passenger flight segment increased 4.3% from $125.18 per passenger flight segment in the six months endedJune 30, 2011 to $130.54 in the six months endedJune 30, 2012.

We experienced a 46.4% increase in non-ticket revenues in the six months endedJune 30, 2012 compared to the same period in 2011, reflecting the continued development and optimization of ancillary revenues and a 22.1%increase in passenger flight segments. Ancillary revenue represented 39.5% of total revenue in the six months endedJune 30, 2012 compared to 34.4% in the same period of 2011.

Operating Expenses

Operating expense increased by $108.7 million for the six months endedJune 30, 2012 compared to the prior year period primarily due to increases in fuel costs and our 17.1% capacity growth.

Aircraft fuel expense for the six months endedJune 30, 2012 increased $40.7 million, or 21.6%, compared to the prior year period due to a 6.4%increase in fuel prices and a 15.3%increase in fuel gallons consumed. The elements of the changes are illustrated in the following table:

	Six Months Ended June 30,					Percent Change
	2012		2011
	(in thousands, except per-gallon amounts)
Into-plane fuel expense	$	227,540	$	192,551		18.2	%
Cash paid (received) from settled derivatives, net of cash settlements paid	37		(7,228		)	(100.5	)%
Economic fuel expense	227,577		185,323			22.8	%
Impact on fuel expense from unrealized (gains) and losses arising from mark-to-market adjustments to our outstanding fuel derivatives	1,381		2,911			(52.6	)%
Aircraft fuel expense (per Statement of Operations)	$	228,958	$	188,234		21.6	%
Fuel gallons consumed	68,559		59,436			15.3	%
Economic fuel cost per gallon	$	3.32	$	3.12		6.4	%
Into-plane fuel cost per gallon	$	3.32	$	3.24		2.5	%

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Fuel gallons consumed increased 15.3% as a result of increased operations as evidenced by a 15.8%increase in block hours. Our average daily aircraft utilization in the six months endedJune 30, 2012 did not change compared to the prior year period.

Total net loss recognized for hedges that settled during the six months endedJune 30, 2012 was $37 thousand, compared to a net benefit of $7.2 million in the prior year period. These amounts represent the net cash paid (received) for the settlement of hedges.

The following table presents our cost per ASM, or unit cost, for the six months endedJune 30, 2012 and 2011 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
	2012	2011
	(in cents, except for percentages)
Aircraft fuel	4.23	4.07	0.16		3.9	%
Salaries, wages and benefits	1.96	1.91	0.05		2.6	%
Aircraft rent	1.27	1.23	0.04		3.3	%
Landing fees and other rents	0.59	0.53	0.06		11.3	%
Distribution	0.53	0.54	(0.01	)	(1.9	)%
Maintenance, materials and repairs	0.44	0.34	0.10		29.4	%
Depreciation and amortization	0.11	0.07	0.04		57.1	%
Other operating	1.10	0.92	0.18		19.6	%
Loss on disposal of assets	0.01	—	0.01		N/A
Special Charges	—	0.05	(0.05	)	N/A
CASM	10.26	9.66	0.60		6.2	%
Adjusted CASM (1)	10.22	9.54	0.68		7.1	%
Adjusted CASM ex fuel (2)	6.02	5.54	0.48		8.7	%

(1) Excludes mark-to-market gains of 0.03 cents and losses of 0.06 cents per ASM for the six months endedJune 30, 2012 and 2011, respectively.

(2) Excludes all components of fuel expense, including realized and unrealized mark-to-market gains and losses.

Our Adjusted CASM ex fuel for the six months endedJune 30, 2012 is up 8.7% as compared to the same period in 2011. Our average stage length for the six months ended June 30, 2012decreased by 4.1%, contributing to the year-over-year increase in Adjusted CASM ex fuel. In addition, we had increased maintenance costs related to our seat maintenance program and hail storm damage incurred during the second quarter of 2012, increased aircraft rent expense due to additional rental cost associated with a wet-leased aircraft, and higher other operating expenses driven by higher average airport costs and increased volume of crew hotel rooms related to the expanded scope of our network and increased crew training, as well as higher costs associated with passenger re-accommodation related to flight cancellations.

Labor costs increased 20% on an absolute dollar basis during the six months endedJune 30, 2012 or 2.6% on a per-unit basis. Our labor cost increases were primarily driven by increases in our pilot, flight attendant and airport service personnel. The introduction of seven new aircraft since the second quarter of 2011, the opening of six new airport stations, as well as a route expansion in the second quarter of 2012 drove a 25% increase in crew headcount, which outpaced our 17.1% capacity (ASM) growth. In addition, we incurred $1.5 million in incremental share-based compensation recorded within salaries, wages and benefits in the six months ended June 30, 2012 as compared to the prior year period, which contributed to total salaries outpacing our ASM growth on a per unit basis.

Landing fees and other rents increased 30.5% on an absolute dollar basis during the six months endedJune 30, 2012 and by 11.3% on a per-unit basis as a result of increased volume at higher cost airports. In addition, the facility rent increase on an absolute dollar basis is the result of an additional six airports served period over period. 

We took delivery of seven Airbus A320 aircraft subsequent to the second quarter of 2011. These aircraft were acquired under sale and leaseback transactions which primarily drove the $12.1 million or 21.4% increase in rent expense in the six months endedJune 30, 2012 as compared to the prior year period. The increase in aircraft rent on a per-unit basis of 3.3% is primarily due to higher rent expense related to the seven new aircraft deliveries as well as $1.2 million of additional aircraft

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rent incurred related to a short-term lease agreement with a third-party provider (wet-leased aircraft) to maintain desired capacity during the summer months.

The increase in distribution costs on an absolute dollar basis is primarily due to increased volume in addition to an increase of approximately 5.1 percentage points year-over-year in the percentage of sales from third-party travel agents, which are more expensive than selling directly through our website. This shift in distribution mix did not materially affect operating income because the revenues received from sales through third-party travel agents are designed to at least offset the associated incremental costs.

Maintenance costs for the six months endedJune 30, 2012 increased by $8.4 million on an absolute dollar basis compared to the prior year period and increased 29.4% on a per-ASM basis. The increase in maintenance costs is primarily due to implementation of the the start-up of the seat maintenance program, which contributed $3.1 million in maintenance costs in the second quarter of 2012. We expect to spend an additional $4.5 million in the second half of 2012 to complete the start-up phase of the seat maintenance program on our entire fleet of aircraft. We do not expect the ongoing expense of our seat maintenance program to have a material impact on our overall future maintenance cost outlook. In addition, damage to aircraft due to a hail storm contributed $0.9 million in maintenance costs in the second quarter of 2012. The average age of our fleet increased to 4.6 years as of June 30, 2012 from 4.2 years as of June 30, 2011. Maintenance expense is expected to increase as our fleet continues to age, resulting in the need for additional repairs over time.

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. The amortization of heavy maintenance costs was $3.3 million and $0.8 million for the six months endedJune 30, 2012 and 2011, 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 $27.3 million and $16.3 million for the six months endedJune 30, 2012 and 2011, respectively.

Depreciation and amortization increased by $3.0 million primarily due to deferred heavy aircraft maintenance events, which in turn resulted in higher amortization expense recorded in the six months endedJune 30, 2012 compared to the prior year period.

Other operating expense for the six months endedJune 30, 2012increased by 19.6% on a per-ASM basis and $17.1 million year-over-year on an absolute dollar basis. Increases in departures of 19.8% and overall increased rates at the airports we serve resulted in increases in variable operating costs such as ground handling expenses and travel and lodging expense in the six months endedJune 30, 2012 compared to the prior year period. The increase in travel and lodging costs was driven by both volume and hotel rate increases associated with increased training and scope of operations. We also experienced higher costs associated with passenger re-accommodation related to a greater percentage of flight cancellations during the second quarter ended 2012.

Special charges decreased $2.4 million in the six months endedJune 30, 2012 compared to the prior year period due to the reimbursement of secondary offering costs recognized during the first quarter of 2012 and the recognition of termination costs of $2.3 million in connection with our IPO during the three months ended June 30, 2011, which included $1.8 million paid to Indigo Partners, LLC to terminate its professional services agreement with us and $0.5 million paid to three individual, unaffiliated holders of our subordinated notes.

Other income (expenses)

Interest expense decreased by $22.6 million due to the elimination of all debt on June 1, 2011 as a result of our IPO and recapitalization. Interest expense and corresponding capitalized interest in the six months endedJune 30, 2012 primarily relates to interest charged by Airbus on deferred pre-delivery deposits and interest related to the TRA.

Income Taxes

Our effective tax rate for the six months endedJune 30, 2012 was 37.5% compared to 37.9% in the prior year period.

Liquidity and Capital Resources

Our primary source of liquidity is cash on hand and cash provided by operations, with our primary uses of liquidity being working capital, capital expenditures, pre-delivery deposits (“PDPs”), and maintenance reserves.

Our total cash at June 30, 2012 was $415.0 million, an increase of $71.6 million from December 31, 2011, primarily driven by cash generated from operations.

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In prior periods, restricted cash represented cash collateral related primarily to a portion of our obligation to fulfill future flights, or air traffic liability (“ATL”), held by credit card processors. Our credit card processors have historically required holdbacks (collateral), which we record as restricted cash, when future air travel and other future services are purchased via credit card transactions. As of September 30, 2011, our restricted cash balance was eliminated, reflecting a complete release of all holdback requirements by all of our credit card processors provided that we continue to satisfy certain financial criteria. Failure to meet these liquidity covenants would provide the processors the right to reinstate a holdback, resulting in a commensurate reduction of unrestricted cash that could be material. As of June 30, 2012, we continued to be in compliance with our credit card processing agreements, and we were not subject to any credit card holdbacks. The maximum potential exposure to cash holdbacks by our credit card processors, based upon advance ticket sales and $9 Fare Club memberships as of June 30, 2012 and December 31, 2011, was $159.5 million and $115.2 million, respectively.

In recent years, our short-term capital needs have been funded primarily by cash from operations. Our most significant capital needs are 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 endedJune 30, 2012, $27.9 million of PDPs have been returned related to delivered aircraft in the period, and we have paid $23.2 million for future deliveries of aircraft and spare engines. As of June 30, 2012, we have $80.5 million of PDPs on our balance sheet, representing the amount paid since inception, net of refunds. Maintenance reserves are paid to aircraft lessors to be held as collateral in advance of our performance of major maintenance activities. In the six months endedJune 30, 2012, we paid $16.5 million in maintenance reserves, net of reimbursements, and as of June 30, 2012, we have $184.4 million ($66.8 million in other current assets and $117.6 million in prepaid aircraft maintenance to lessors) on our balance sheet, representing the amount paid in reserves since inception, net of reimbursements.

We do not have financing commitments in place for 101 of the aircraft currently on firm order which are scheduled for delivery in late 2012 through 2021. These future aircraft deliveries may be leased or otherwise financed based on market conditions, our prevailing level of liquidity, and capital market availability.

Net Cash Flows Provided By Operating Activities. Operating activities in the six months endedJune 30, 2012provided$97.4 million in cash compared to $37.9 millionprovided in cash in the six months endedJune 30, 2011. The increase is primarily due to cash received from sales for future travel. In the six months endedJune 30, 2011, we were still subject to holdback requirements which resulted in all cash from sales on future travel being held back and recorded as restricted cash. In addition, the increase in cash was also attributed to higher earnings during the six months endedJune 30, 2012 compared to the prior year period.

Net Cash Flows Used In Investing Activities. During the six months endedJune 30, 2012, investing activities used$5.4 million, compared to $21.9 millionused for the prior year period. The decrease is mainly due to the refund of $27.9 million in PDPs related to the delivery of five aircraft from Airbus and corresponding sale and leaseback transactions, the sale of intangible assets for $9.1 million, offset by higher capital expenditures which included the purchase of two spare engines for $10.3 million during the six months endedJune 30, 2012.

Net Cash Provided By (Used In) Financing Activities. During the six months endedJune 30, 2012, we paid $27.2 million related to the Tax Receivable Agreement (TRA), received $5.6 million in proceeds from the sale of a spare engine as part of sale and leaseback transactions, retained $1.5 million as a result of excess tax benefits related to share-based payments, and received cash as a result of exercised stock options. Additional cash used in financing activities consisted of cash used to purchase treasury stock. As of June 30, 2012, an estimated remaining cash benefit of $9.5 million is expected to be paid to our Pre-IPO Stockholders under the terms of the TRA in 2013.

Commitments and Contractual Obligations

The following table discloses aggregate information about our contractual obligations as of June 30, 2012 and the periods in which payments are due:

(in millions)	Total		Remainder of 2012		2013 - 2014		2015 - 2016		Thereafter
Operating lease obligations	$	1,122	$	77	$	304	$	298	$	443
Flight equipment purchase obligations	4,752		96		671		1,030		2,955
Total future payments on contractual obligations (1)	$	5,874	$	173	$	975	$	1,328	$	3,398

(1)     Does not include remaining contractual payments to the Pre-IPO Stockholders under the Tax Receivable Agreement

(estimated to be approximately $9.5 million as of June 30, 2012). See Note 10.

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Off-Balance Sheet Arrangements

We have significant obligations for aircraft as all 42 of our aircraft are operated under operating leases and therefore are not reflected on our balance sheets. These leases expire between 2017 and 2024. Aircraft rent payments were $34.8 million and $29.2 million, for the three months ended June 30, 2012 and 2011, respectively, and $67.7 million and $58.1 million for the six months ended June 30, 2012 and 2011, respectively. Our aircraft lease payments for 37 of our aircraft are fixed-rate obligations. Five of our leases provide for variable rent payments, which fluctuate based on changes in LIBOR (London Interbank Offered Rate).

Our contractual purchase commitments consist primarily of aircraft and engine acquisitions through manufacturers and aircraft leasing companies. As of June 30, 2012, our firm orders consisted of 101 A320 family aircraft (56 of the existing aircraft model A320s and 45 A320 NEOs) with Airbus and engine orders with International Aero Engines consisted of three spare V2500 IAE International Aero Engines AG engines. Aircraft are scheduled for delivery from 2012 through 2021, and spare engines are scheduled for delivery from 2013 through 2018. Committed expenditures for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and aircraft pre-delivery deposits, will be approximately $96 million for the remainder of 2012, $323 million in 2013, $348 million in 2014, $520 million in 2015, $510 million in 2016 and $2,955 million in 2017 and beyond.

As of June 30, 2012, we had lines of credit related to corporate credit cards of $13.6 million from which we had drawn $5.4 million. As of June 30, 2011, we had lines of credit related to corporate credit cards of $3.6 million from which we had drawn $2.4 million.

As of June 30, 2012, we have lines of credit with counterparties to our jet fuel derivatives in the amount of $18.0 million. Of the $18.0 million in lines of credit, $5.0 million is provided exclusively for jet fuel derivatives, $10.0 million is provided exclusively for physical fuel delivery and the remaining $3.0 million is provided for either purpose. As of June 30, 2012, we had drawn $8.2 million for physical fuel delivery and had not drawn on the remaining lines. As of June 30, 2011, we had lines of credit with counterparties in the amount of $2.0 million exclusively for jet fuel derivatives. As of June 30, 2011, we had not drawn on the 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, 2012, we have $2.3 million in uncollateralized surety bonds and a $10.0 million unsecured standby letter of credit facility of which $7.3 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 restructuring charges and mark-to-market gains or losses, divided by ASMs.

“Adjusted CASM ex fuel” means operating expenses less aircraft fuel expense and excluding restructuring charges and mark-to-market gains or losses, 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.

“Average aircraft” means the average number of aircraft used in flight operations, 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, 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” means the average number of miles flown per passenger flight segment.

“Average yield” means the average amount one passenger pays to fly one mile, 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” means the total number of passengers flown on all flight segments.

“PDP” means pre-delivery deposit payment.

“Revenue passenger miles” or “RPMs” means the number of miles flown by passengers.

“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 endedJune 30, 2012 and 2011 represented 41.2% and 42.1% 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 often use basis swaps, priced using NYMEX Heating Oil indexes, to protect the refining price risk between the price of crude oil and the price of refined jet fuel. Based on our fuel consumption over the last 12 months, a 10% increase in the average price per gallon of aircraft fuel would have increased aircraft fuel expense by approximately $42.9 million. To attempt to manage fuel price risk, from time to time we use jet fuel option contracts, swap agreements and basis swaps to mitigate a portion of the crack spread between crude and jet fuel. As of June 30, 2012, we had fuel hedges using Gulf Coast jet fuel collars in place for approximately 19% of our estimated fuel consumption for the third quarter of 2012.

The fair value of our fuel derivative contracts as of June 30, 2012 and December 31, 2011 was a $1.1 million liability and a $0.3 million asset, respectively. 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. As of June 30, 2012, we believe the credit exposure related to these fuel forward contracts was negligible.

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 2011 would affect total aircraft rent expense in 2012 by less than $0.1 million.

ITEM 4. 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, 2012. 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 SEC’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, 2012, 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 during the six months endedJune 30, 2012 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

28

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 currently believe the ultimate outcome of such 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.

In June 2011, we and a competitor, Allegiant Travel Services, LLC (“Allegiant,” and together with us, “Petitioners”), filed petitions of appeal in the U.S. Court of Appeals for the D.C. Circuit ("Court"), requesting relief from certain aspects of a new rule adopted by the Department of Transportation (“DOT”), which rule is known as Enhancing Airline Passenger Protections Final Rule (“EAPP-2”). The petitions, filed by us on June 15, 2011 and by Allegiant on June 16, 2011, have been consolidated. The aspects of EAPP-2 that we and Allegiant have challenged include (i) a requirement to quote fares inclusive of government taxes and fees, rather than quoting such taxes and fees separately from the base fare, (ii) a requirement that travel reservations be held at the quoted fare without payment, or canceled without penalty, for at least 24 hours after the reservation is made if the reservation is made one week or more prior to a flight’s departure, and (iii) a prohibition on post-purchase price increases for products and services not purchased at the time of the initial booking. On July 24, 2012, the Court denied our petition.

ITEM 1A. RISK FACTORS

There have been no material changes to the factors disclosed in Item 1A Risk Factors in the Company's Annual Report on Form 10-K for the year ended December 31, 2011. Investors are urged to review these risk factors carefully.

29

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 Securities Exchange Act of 1934, as amended (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.

** Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933 or Section 18 of the Securities Exchange Act of 1934 and otherwise are not subject to liability.

30

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 30, 2012	By:	/s/ Edward Christie
		Edward Christie
		Senior Vice President and Chief Financial Officer

31

EX-31.1

Exhibit 31.1

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, B. Ben Baldanza, certify that:

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

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 Company as of, and for, the periods presented in this report;

4. The Company’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 Company 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 Company, 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) evaluated the effectiveness of the Company’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

c) disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’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 Company’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 Company’s internal control over financial reporting.

Date: July 30, 2012	/s/ B. Ben Baldanza
	B. Ben Baldanza
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Edward Christie, certify that:

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

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 Company as of, and for, the periods presented in this report;

4. The Company’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 Company 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 Company, 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) evaluated the effectiveness of the Company’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

c) disclosed in this report any change in the Company’s internal control over financial reporting that occurred during the Company’s most recent fiscal quarter (the Company’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting; and

5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’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 Company’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 Company’s internal control over financial reporting.

Date: July 30, 2012	/s/ Edward Christie
	Edward 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, 2012 (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 30, 2012	/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, 2012 (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 30, 2012	/s/ Edward Christie
	Edward Christie
	Senior Vice President and
	Chief Financial Officer

XML

Stock-Based Compensation - Performance Share Awards (Details) (Performance Shares Awards [Member], USD $)	6 Months Ended
	Jun. 30, 2012
Performance Shares Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding (in shares)	0
Granted (in shares)	262,500
Vested (in shares)	0
Forfeited (in shares)	0
Outstanding (in shares)	262,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding, Weighted-average grant date fair value (in dollars per share)	$ 0
Granted, weighted-average grant date fair value (in dollars per share)	$ 32.26
Vested, weighted-average grant date fair value (in dollars per share)	$ 0
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 0
Outstanding, Weighted-average grant date fair value (in dollars per share)	$ 32.26

XML

Commitments and Contingencies - Commitments (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012 aircraft_engine	Jun. 30, 2012 aircraft_engine	Dec. 31, 2011
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of spare aircraft engines ordered (in aircraft engine)	3	3
Sale leaseback transaction, deferred gain (loss)	$ (4,900,000)	$ (4,900,000)
Sale leaseback transaction, refund in pre-delivery deposits	27,900,000
Amount of credit card holdback	0	0
Maximum potential exposure to cash holdbacks from credit card processors	159,500,000	159,500,000	115,200,000
Interest included in cash payment to pre-IPO stockholders pursuant to tax receivable agreement		300,000
Cash payment including interest to pre-IPO stockholders pursuant to tax receivable agreement	27,200,000
Aircraft and Related Flight Equipment [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Committed expenditures, remiander of 2012	96,000,000	96,000,000
Committed expenditures, 2013	323,000,000	323,000,000
Committed expenditures, 2014	348,000,000	348,000,000
Committed expenditures, 2015	520,000,000	520,000,000
Committed expenditures, 2016	510,000,000	510,000,000
Committed expenditures, 2017 and beyond	2,955,000,000	2,955,000,000
Reservation System Provider [Member]
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Committed expenditures, remiander of 2012	1,500,000	1,500,000
Committed expenditures, 2013	3,100,000	3,100,000
Committed expenditures, 2014	3,700,000	3,700,000
Committed expenditures, 2015	3,700,000	3,700,000
Committed expenditures, 2016	3,700,000	3,700,000
Committed expenditures, 2017 and beyond	$ 6,200,000	$ 6,200,000
Airbus A320 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircraft ordered (in aircraft)	101	101
Number of aircraft in sale and leaseback agreement	5
Airbus A320, current model [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircraft ordered (in aircraft)	56	56
Airbus A320 NEO [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircraft ordered (in aircraft)	45	45

XML

Accrued Liabilities

6 Months Ended

Jun. 30, 2012

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

Accrued liabilities included in other current liabilities as of June 30, 2012 and December 31, 2011 consist of the following:

	June 30, 2012		December 31, 2011
	(in thousands)
Federal excise and other passenger taxes and fees payable	$	27,383	$	17,813
Salaries and wages	18,381		17,123
Airport expenses	13,693		10,682
Aircraft maintenance	10,575		7,816
Fuel	10,288		87
Current portion of tax receivable agreement	9,490		27,399
Deferred gain on sale of slots	9,060		—
Aircraft and facility rent	7,096		7,206
Restructuring	234		329
Other	11,279		10,401
Accrued liabilities	$	117,479	$	98,856

Slot Transaction

During June 2012, the Company transferred four permanent air carrier slots at Ronald Reagan National Airport to another airline ("buyer") for $9.1 million in cash, which the Company received in June. Due to FAA regulations, the buyer may not operate the slots until written confirmation of the slot transfer has been received from the FAA. In accordance with FAA's 80% “use or lose” requirements, the Company will continue to operate all four slots through September 6, 2012. Due to the restriction preventing operating use of the slots by buyer, the gain of $9.1 million was fully deferred as of June 30, 2012 and included within other current liabilities on the accompanying balance sheet. The Company expects to recognize a $9.1 million gain in the third quarter of 2012, the period in which the FAA operating restriction lapses and written confirmation of the slot transfer is expected to be received by the buyer from the FAA.

XML

Fair Value Measurements - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Fair Value Disclosures [Abstract]
Losses included in earnings attributable to the change in unrealized gains or losses related to aircraft fuel derivatives	$ (0.9)
Debt outstanding	$ 0	$ 0

XML

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Details) (Aircraft fuel derivatives [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Mar. 31, 2012
Aircraft fuel derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 0.1	$ 0.3
Total gains (losses) realized or unrealized included in earnings, net	(3.6)	2.2
Settlements, net	(2.5)	(2.4)
Balance at end of period	$ (1.0)	$ 0.1

XML

Stock-Based Compensation - Share Option Activity (Details) (Stock Options [Member], USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding (in shares)	312,000
Grants in period (in shares)	0	0
Exercised (in shares)	(39,125)
Forfeited or expired (in shares)	(3,625)
Outstanding (in shares)	269,250		312,000
Exercisable (in shares)	55,125
Vested or expected to vest (in shares)	256,204
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, weighted-average exercise price (in dollars per share)	$ 9.33
Granted, weighted-average exercise price (in dollers per share)	$ 0.00
Exercised, weighted-average exercise price (in dollars per share)	$ 7.80
Forfeited or expired, weighted-average exercise price (in dollars per share)	$ 7.80
Outstanding, weighted-average exercise price (in dollars per share)	$ 9.58		$ 9.33
Exercisable, weighted-average exercise price (in dollars per share)	$ 8.43
Vested or expected to vest, weighted-average exercise price (in dollars per share)	$ 9.54
Outstanding, average remaining contractual term (in years)	8 years 4 months 24 days		8 years 10 months 24 days
Outstanding, average remaining contractual term (in years)	8 years 4 months 24 days		8 years 10 months 24 days
Exercisable, average remaining contractual term (in years)	8 years 1 month 6 days
Vested or expected to vest, average remaining contractual term (in years)	8 years 4 months 24 days
Outstanding, aggregate intrinsic value	$ 1,946,000
Outstanding, aggregate intrinsic value	2,661,000		1,946,000
Exercisable, aggregate intrinsic value	608,000
Vested or expected to vest, aggregate intrinsic value	2,541,000
Total intrinsic value of share options exercised	$ 500,000

XML

Stock-Based Compensation - Restricted Stock Activity (Details) (Restricted Stock [Member], USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding (in shares)	271,999
Granted (in shares)	298,692		0
Vested (in shares)	(164,515)
Forfeited (in shares)	(15,125)
Outstanding (in shares)	391,051		271,999
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding, Weighted-average grant date fair value (in dollars per share)	$ 1.43
Granted, weighted-average grant date fair value (in dollars per share)	$ 20.29
Vested, weighted-average grant date fair value (in dollars per share)	$ 3.04
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 3.79
Outstanding, Weighted-average grant date fair value (in dollars per share)	$ 15.07		$ 1.43
Total fair value of shares vested	$ 3.3	$ 2.2

XML

Net Income per Share

6 Months Ended

Jun. 30, 2012

Earnings Per Share [Abstract]

Net Income per Share

Net Income 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,
	2012		2011		2012		2011
	(in thousands, except per-share amounts)
Numerator
Net income	$	34,591	$	16,917	$	58,010	$	24,800
Denominator
Weighted-average shares outstanding, basic	72,379		41,493		72,336		33,962
Effect of dilutive nonvested stock awards	205		276		206		308
Adjusted weighted-average shares outstanding, diluted	72,584		41,769		72,542		34,270
Net Income per Share
Basic earnings per common share	$	0.48	$	0.41	$	0.80	$	0.73
Diluted earnings per common share	$	0.48	$	0.41	$	0.80	$	0.72

For the three and six months ended June 30, 2012, there was a weighted-average of 40 thousand and 26 thousand anti-dilutive stock awards, respectively, excluded from the computation of diluted earnings per common share. At June 30, 2011, there were no anti-dilutive awards excluded from the computation of diluted earnings per common share.

XML

Stock-Based Compensation - Simulation Model Input Variables (Details) (Performance Shares Awards [Member])	3 Months Ended
	Jun. 30, 2012
Performance Shares Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility factor (as a percent)	39.00%
Risk-free interest rate (as a percent)	0.45%
Expected term (in years)	2 years 9 months
Expected dividend yield (as a percent)	0.00%

XML

Condensed Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenues:
Passenger	$ 211,812	$ 180,418	$ 391,890	$ 333,698
Non-ticket	134,496	95,473	255,913	174,855
Total operating revenue	346,308	275,891	647,803	508,553
Operating expenses:
Aircraft fuel	120,233	107,322	228,958	188,234
Salaries, wages and benefits	53,489	45,173	106,143	88,366
Aircraft rent	36,060	29,081	68,933	56,789
Landing fees and other rents	17,066	13,007	32,180	24,662
Distribution	14,738	13,037	28,939	24,969
Maintenance, materials and repairs	13,558	7,480	23,972	15,538
Depreciation and amortization	3,327	1,691	6,197	3,237
Other operating	32,657	21,826	59,680	42,559
Loss on disposal of assets	33	35	482	35
Special charges	15	2,280	(57)	2,361
Total operating expenses	291,176	240,932	555,427	446,750
Operating income	55,132	34,959	92,376	61,803
Other (income) expense:
Interest expense	794	9,678	1,334	23,964
Capitalized interest	(794)	(1,039)	(1,334)	(2,076)
Interest income	(180)	(71)	(595)	(157)
Other expense	84	76	127	124
Total other (income) expense	(96)	8,644	(468)	21,855
Income before income taxes	55,228	26,315	92,844	39,948
Provision for income taxes	20,637	9,398	34,834	15,148
Net income	$ 34,591	$ 16,917	$ 58,010	$ 24,800
Net income per share, basic	$ 0.48	$ 0.41	$ 0.80	$ 0.73
Net income per share, diluted	$ 0.48	$ 0.41	$ 0.80	$ 0.72

XML

Recent Accounting Developments

6 Months Ended

Jun. 30, 2012

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Developments

Recent Accounting Developments

In May 2011, the FASB issued Accounting Standards Update No. 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards (Topic 820)—Fair Value Measurement (ASU 2011-04). This ASU provides a consistent definition of fair value and ensures that the fair value measurement and disclosure requirements are similar between GAAP and International Financial Reporting Standards. ASU 2011-04 changes certain fair value measurement principles and enhances the disclosure requirements particularly for Level 3 fair value measurements. ASU 2011-04 requires public and non-public companies to disclose the unobservable inputs that are significant to the fair value measurement. Public companies are now required to quantitatively disclose the unobservable inputs used in their Level 3 measurements. ASU 2011-04 provides examples of information companies might provide to comply with the disclosure requirements. The requirements include: (1) a description of the group responsible for valuation policies and procedures, to whom the group reports and the types of internal reporting procedures in place (e.g., interaction between the group and risk management or the audit committee to assess fair value measurements); (2) a description of the frequency and methods for calibration, back testing and other testing procedures used to evaluate pricing models; (3) a description of the process for analyzing changes in fair value measurements from period to period; (4) a description of the methods used to evaluate pricing information provided by third-party brokers or pricing services; (5) a description of the methods used to develop and substantiate the unobservable inputs used in a fair value measurement; and (6) a narrative description of the sensitivity of recurring Level 3 fair value measurements to changes in the unobservable inputs used, if changing those inputs would significantly affect the fair value measurement. On January 1, 2012, the Company adopted ASU 2011-04.

The adoption of ASU 2011-04 resulted in qualitative presentation changes to the Company's disclosures related to fair value measurements as disclosed in Note 8. These changes were primarily the addition of discussion regarding the Company's valuation policies and procedures including the frequency of valuation and testing of valuation models as well as the sensitivity of the Company's model to changes in unobservable inputs.

In December 2011, the FASB issued amendments to Accounting Standards Update No. 2011-11, Balance Sheet (Topic 210); Disclosures about Offsetting Assets and Liabilities (ASU 2011-11). The amendments in this update are designed to enhance disclosures by requiring improved information about financial instruments and derivative instruments that are either (a) offset in accordance with certain right to set-off conditions prescribed by current accounting guidance or (b) subject to an enforceable master netting arrangement or similar agreement, irrespective of whether they are offset in accordance with current accounting guidance. The amendments to ASU 2011-11 will be effective for the first interim or annual period beginning on or after January 1, 2013. Management does not expect the adoption of ASU 2011-11 to have a material impact on its financial statements.

XML

Initial Public Offering and Tax Receivable Agreement (Details) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended
	Jun. 02, 2011 debtors	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Initial Public Offering [Line Items]
Gross Proceeds from initial public offering	$ 187,200,000
Common stock price at IPO (in dollars per share)	$ 12.00
Proceeds from IPO, after underwriter commissions	176,900,000
Proceeds from IPO, after paying debt and direct issuance costs	150,000,000
Debts paid from IPO proceeds	20,600,000
Payments to debt holders from IPO proceeds	450,000
Number of unaffiliated debt holders paid with IPO proceeds (in debtors)	3
Direct IPO costs	5,900,000
Debt exchanged for common stock	279,200,000
Unpaid dividends exchanged for common stock	81,700,000
Common shares exchanged for forgiveness of debt and unpaid dividends (in shares)	30,079,420
Interest expense reduction from IPO transactions	400,000
Percentage of cash savings from pre-IPO NOLs due to pre-IPO stockholders	90.00%
Cash payment including interest to pre-IPO stockholders pursuant to tax receivable agreement		27,200,000
Interest included in cash payment to pre-IPO stockholders pursuant to tax receivable agreement			300,000
Estimated remaining cash payment to pre-IPO stockholders		$ 9,490,000	$ 9,490,000	$ 27,399,000
Common Class B [Member]
Initial Public Offering [Line Items]
Conversion ratio for class B common stock to common stock (in shares)	1.0

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Net Income per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Numerator
Net income	$ 34,591	$ 16,917	$ 58,010	$ 24,800
Denominator
Weighted-average shares outstanding, basic (in shares)	72,379,000	41,493,000	72,336,000	33,962,000
Effect of dilutive nonvested stock awards (in shares)	205,000	276,000	206,000	308,000
Adjusted weighted-average shares outstanding, diluted (in shares)	72,584,000	41,769,000	72,542,000	34,270,000
Net Income per Share
Basic earnings per common share (in dollars per share)	$ 0.48	$ 0.41	$ 0.80	$ 0.73
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.41	$ 0.80	$ 0.72
Antidilutive awards excluded from computation of earnings per common share (in shares)	40,000		26,000	0

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Financial Instruments and Risk Management (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Fuel, Transportation [Member] gal	Dec. 31, 2011 Fuel, Transportation [Member] gal	Jun. 30, 2012 Heating Oil [Member]
Derivative [Line Items]
Into-plane fuel cost	$ 116,600,000	$ 107,000,000	$ 227,500,000	$ 192,600,000
Changes in value and settlements of fuel hedge contracts	3,600,000	300,000	1,400,000	(4,300,000)
Aircraft fuel expense	120,233,000	107,322,000	228,958,000	188,234,000
Realized gains (losses) from derivatives	(2,500,000)	3,100,000	(37,000)	7,200,000
Unrealized gains (losses) from derivatives	$ (1,100,000)	$ (3,500,000)	$ (1,400,000)	$ (2,900,000)
Nonmonetary notional amount (in gallons)					7,500,000	13,450,000
Nonmonetary notional amount, percent of required need, coverage (as a percent)					19.00%	9.00%	72.00%
Weighted average floor price (in dollars per gallon)					2.95	2.81
Weighted average ceiling price (in dollars per gallon)					3.16	2.99

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Special Charges

6 Months Ended

Jun. 30, 2012

Restructuring and Related Activities [Abstract]

Special Charges

Special Charges

Secondary Offering Costs

On January 25, 2012, certain stockholders of the Company, including affiliates of Oaktree Capital Management and Indigo Partners and certain members of the Company's executive team, sold an aggregate of 12,650,000 shares of common stock in an underwritten public offering (the secondary offering). The Company incurred a total of $1.3 million in costs between 2011 and 2012 related to the January 2012 secondary offering, of which $0.5 million were incurred during the six months ended June 30, 2012, offset by reimbursements from certain selling shareholders of $0.5 million in accordance with the Fourth Amendment to the Second Amended and Restated Investor Rights Agreement. The Company did not receive any proceeds from the sale of shares in the secondary offering.

Initial Public Offering Costs

In June 2011, the Company issued and sold 15,600,000 shares of common stock in its initial public offering (IPO). The Company incurred contract termination costs and fees of $2.3 million in connection with the IPO during the six months ended June 30, 2011, which included $1.8 million paid to Indigo Partners, LLC to terminate its professional services agreement with the Company and $0.5 million paid to three individual, unaffiliated holders of the Company’s subordinated notes.

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Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 414,977	$ 343,328
Accounts receivable, net	24,936	15,425
Deferred income taxes	17,982	20,738
Other current assets	81,668	63,217
Total current assets	539,563	442,708
Property and equipment:
Flight equipment	10,698	4,182
Ground and other equipment	51,365	46,608
Less accumulated depreciation	(30,127)	(27,580)
Total property and equipment	31,936	23,210
Deposits on flight equipment purchase contracts	84,291	91,450
Prepaid aircraft maintenance to lessors	117,560	120,615
Security deposits and other long-term assets	96,175	67,830
Total assets	869,525	745,813
Current liabilities:
Accounts payable	28,599	15,928
Air traffic liability	145,085	112,280
Other current liabilities	117,479	98,856
Total current liabilities	291,163	227,064
Long-term deferred income taxes	22,191	12,108
Deferred credits and other long-term liabilities	28,848	39,935
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	499,599	496,136
Treasury stock	(985)	(129)
Retained earnings (deficit)	28,702	(29,308)
Total shareholders' equity	527,323	466,706
Total liabilities and shareholders' equity	$ 869,525	$ 745,813

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Financial Instruments and Risk Management (Tables)

6 Months Ended

Jun. 30, 2012

Investments, All Other Investments [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, 2012 and 2011:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in millions)
Into-plane fuel cost	$	116.6	$	107.0	$	227.5	$	192.6
Changes in value and settlements of fuel hedge contracts	3.6		0.3		1.4		(4.3		)
Aircraft fuel expense	$	120.2	$	107.3	$	229.0	$	188.2

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Document	6 Months Ended
	Jun. 30, 2012	Jul. 17, 2012 Common Stock [Member]	Jul. 17, 2012 Nonvoting Common Stock [Member]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2012
Document Fiscal Year Focus	2012
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	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		70,853,821	1,669,205

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Employee groups and status of the collective bargaining agreements

The table below sets forth our employee groups and status of the collective bargaining agreements.

Employee Groups	Representative	Amendable Date
Pilots	Air Line Pilots Association, International (ALPA)	August 2015
Flight Attendants	Association of Flight Attendants (AFA-CWA)	August 2007
Dispatchers	Transport Workers Union (TWU)	July 2012

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Condensed Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net cash provided by operating activities	$ 97,420	$ 37,902
Investing activities:
Proceeds from sale of property, equipment and slots	9,074	5,537
Pre-delivery deposits for flight equipment, net of refunds	4,738	(20,091)
Purchase of property and equipment, net	(19,218)	(7,305)
Net cash used in investing activities	(5,406)	(21,859)
Financing activities:
Proceeds from issuance of common stock	303	171,014
Payments on debt	0	(20,564)
Proceeds from sale leaseback transactions	5,627	0
Payments to pre-IPO shareholders pursuant to tax receivable agreement	(26,905)	0
Excess tax benefits from share-based compensation	1,466	0
Repurchase of restricted common stock	(856)	(757)
Debt issuance costs	0	8
Net cash provided by (used in) financing activities	(20,365)	149,701
Net increase in cash and cash equivalents	71,649	165,744
Cash and cash equivalents at beginning of period	343,328	82,714
Cash and cash equivalents at end of period	414,977	248,458
Cash Payments for:
Interest paid	287	2,615
Taxes paid	21,819	187
Non-cash transactions
Exchange of Notes due to related parties for common stock	0	279,206
Exchange of mandatorily redeemable preferred stock for common stock	0	81,747
Liability and offsetting reduction to equity recorded related to tax receivable agreement	$ 0	$ 35,889

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Fair Value Measurements

6 Months Ended

Jun. 30, 2012

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 fuel derivative contracts, which primarily consist of costless collar contracts, 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 fair value on a recurring basis are summarized below:

	Fair Value Measurements as of June 30, 2012
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	415.0	$	415.0	$	—	$	—
Basis swaps	0.3		—		—		0.3
Option contracts	0.1		—		—		0.1
Total assets	$	415.4	$	415.0	$	—	$	0.4
Option contracts	$	1.4	$	—	$	—	$	1.4
Total liabilities	$	1.4	$	—	$	—	$	1.4

	Fair Value Measurements as of December 31, 2011
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	343.3	$	343.3	$	—	$	—
Option contracts	1.0		—		—		1.0
Total assets	$	344.3	$	343.3	$	—	$	1.0
Option contracts	$	0.7	$	—	$	—	$	0.7
Total liabilities	$	0.7	$	—	$	—	$	0.7

Cash and cash equivalents at June 30, 2012 and December 31, 2011 are comprised of liquid money market funds and cash. 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 endedJune 30, 2012 and the year ended December 31, 2011.

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 hedge contracts are recorded each period in fuel expense. Fair values of the instruments are 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. The Company offsets fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. The Company determines the fair value of fuel derivative option contracts 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.

Due to the fact that certain inputs utilized to determine the fair value of aircraft fuel derivatives are unobservable (principally implied volatility), the Company has categorized these derivatives as Level 3. Implied volatility of an option contract is the volatility of the price of the underlying that is implied by the market price of the option based on an option pricing model. Thus, it is the volatility that, when used in a particular pricing model, yields a theoretical value for the option equal to the current market price of that option. Implied volatility, a forward-looking measure, differs from historical volatility because the latter is calculated from known past returns. At each balance sheet date, the Company substantiates and adjusts unobservable inputs. The Company routinely assesses the valuation model's sensitivity to changes in implied volatility. Based on the Company's assessment of the valuation model's sensitivity to changes in implied volatility, it noted that holding other inputs constant, a significant increase (decrease) in implied volatility would result in a significantly higher (lower) determination of fair value measurement for the Company's aircraft fuel derivatives.

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 Audit Committee who approve all derivative transactions. 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 fair value on a recurring basis using significant unobservable inputs (Level 3):

	Fuel Derivative Activity for Six Months Ended June 30, 2012
	(in millions)
Balance at December 31, 2011	$	0.3
Total gains (losses) realized or unrealized included in earnings, net	2.2
Settlements, net	(2.4		)
Balance at March 31, 2012	$	0.1
Total gains (losses) realized or unrealized included in earnings, net	(3.6		)
Settlements, net	2.5
Balance at June 30, 2012	$	(1.0	)

Total losses during the three months endedJune 30, 2012, included in earnings, attributable to the change in unrealized gains or losses related to aircraft fuel derivatives still held by the Company were $0.9 million. The Company records the fair value 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 balance sheet date.

The Company did not have any outstanding debt as of June 30, 2012 or December 31, 2011.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2012

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, 2012, firm aircraft orders with Airbus consisted of 101 A320 family aircraft (56 of the existing aircraft model and 45 A320 NEOs) and engine orders with International Aero Engines consisted of three spare V2500 IAE International Aero Engines AG engines. Aircraft are scheduled for delivery from 2012 through 2021, and spare engines are scheduled for delivery from 2013 through 2018. Committed expenditures for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and pre-delivery payments, will be approximately $96 million for the remainder of 2012, $323 million in 2013, $348 million in 2014, $520 million in 2015, $510 million in 2016 and $2,955 million in 2017 and beyond.

During the first six months of 2012, the Company entered into sale and leaseback transactions with third-party aircraft lessors for the sale and leaseback of five Airbus A320 aircraft that resulted in deferred losses of $4.9 million, which are included in other long-term assets on the accompanying balance sheet. The deferred losses will be recognized as an increase 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 $27.9 million in pre-delivery deposits from Airbus for the six months endedJune 30, 2012. The refunded pre-delivery deposits have been disclosed in the accompanying statement of cash flows as investing activities within pre-delivery deposits for flight equipment, net of refunds. All of the leases from these sale and leaseback transactions are accounted for as operating leases. Under the terms of the lease agreements, the Company will continue to operate and maintain the aircraft. Rent payments under the lease agreements are fixed for the term of the lease. The lease agreements provide for 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, standard maintenance and return condition provisions, and the payment of

maintenance reserves. 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.

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 fees, and other ancillary services by customers. As 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 that its credit card processors hold to cover refunds to customers if the Company fails to fulfill its flight obligations. During 2011, the Company amended its contractual agreements with all of its processors in light of the Company’s improved balance sheet attributable to the Company's IPO and related recapitalization, resulting in the elimination of all required holdbacks. As of June 30, 2012, the Company continued to be in compliance with its credit card processing agreements, resulting in the respective processors holding back $0 of remittances.

Failure to meet certain liquidity covenants would provide the processors the right to reinstate a holdback, resulting in a commensurate reduction of unrestricted cash. 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, 2012 and December 31, 2011, was $159.5 million and $115.2 million, respectively.

Employees

Approximately 53% of the Company’s employees are covered under collective bargaining agreements. The table below sets forth our employee groups and status of the collective bargaining agreements.

Employee Groups	Representative	Amendable Date
Pilots	Air Line Pilots Association, International (ALPA)	August 2015
Flight Attendants	Association of Flight Attendants (AFA-CWA)	August 2007
Dispatchers	Transport Workers Union (TWU)	July 2012

The collective bargaining agreement between the Company and the Company’s pilots represents 21% of the Company’s employees and was executed on August 1, 2010.

The collective bargaining agreement between the Company and the Company’s flight attendants represents approximately 31% of the Company’s employees and became amendable on August 6, 2007. The Company and the union are currently in negotiations to reach a new collective bargaining agreement. The CBA between the Company and its dispatchers represents approximately 1% of the Company’s employees.

The Company is self-insured for health care claims 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 $1.7 million and $2.0 million for health care claims as of June 30, 2012 and December 31, 2011, respectively.

Other

The Company is contractually obligated to pay the following minimum guaranteed payments to the provider of its reservation system as of June 30, 2012: $1.5 million for the remainder of 2012, $3.1 million in 2013, $3.7 million in 2014, $3.7 million in 2015, $3.7 million in 2016 and $6.2 million in 2017 and thereafter.

The Company entered into a Tax Receivable Agreement (“TRA”) with the Company's Pre-IPO Stockholders (as defined in the TRA) that became effective immediately prior to the consummation of the IPO. In accordance with the TRA, the Company paid $27.2 million, including $0.3 million of applicable interest, in the second quarter of 2012. See Note 10.

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Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Jun. 30, 2012 aircraft_slot	Dec. 31, 2011
Payables and Accruals [Abstract]
Federal excise and other passenger taxes and fees payable	$ 27,383	$ 17,813
Salaries and wages	18,381	17,123
Airport expenses	13,693	10,682
Aircraft maintenance	10,575	7,816
Fuel	10,288	87
Current portion of tax receivable agreement	9,490	27,399
Deferred gain on sale of slots	9,060	0
Aircraft and facility rent	7,096	7,206
Restructuring	234	329
Other	11,279	10,401
Accrued liabilities	$ 117,479	$ 98,856
Number of permanent air carrier slots transferred	4

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

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

	Fair Value Measurements as of June 30, 2012
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	415.0	$	415.0	$	—	$	—
Basis swaps	0.3		—		—		0.3
Option contracts	0.1		—		—		0.1
Total assets	$	415.4	$	415.0	$	—	$	0.4
Option contracts	$	1.4	$	—	$	—	$	1.4
Total liabilities	$	1.4	$	—	$	—	$	1.4

	Fair Value Measurements as of December 31, 2011
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	343.3	$	343.3	$	—	$	—
Option contracts	1.0		—		—		1.0
Total assets	$	344.3	$	343.3	$	—	$	1.0
Option contracts	$	0.7	$	—	$	—	$	0.7
Total liabilities	$	0.7	$	—	$	—	$	0.7

Assets and liabilities measured at fair value on a recuring basis using significant unobservable inputs (level 3)

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

	Fuel Derivative Activity for Six Months Ended June 30, 2012
	(in millions)
Balance at December 31, 2011	$	0.3
Total gains (losses) realized or unrealized included in earnings, net	2.2
Settlements, net	(2.4		)
Balance at March 31, 2012	$	0.1
Total gains (losses) realized or unrealized included in earnings, net	(3.6		)
Settlements, net	2.5
Balance at June 30, 2012	$	(1.0	)

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Net Income per Share (Tables)

6 Months Ended

Jun. 30, 2012

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,
	2012		2011		2012		2011
	(in thousands, except per-share amounts)
Numerator
Net income	$	34,591	$	16,917	$	58,010	$	24,800
Denominator
Weighted-average shares outstanding, basic	72,379		41,493		72,336		33,962
Effect of dilutive nonvested stock awards	205		276		206		308
Adjusted weighted-average shares outstanding, diluted	72,584		41,769		72,542		34,270
Net Income per Share
Basic earnings per common share	$	0.48	$	0.41	$	0.80	$	0.73
Diluted earnings per common share	$	0.48	$	0.41	$	0.80	$	0.72

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The Company has stock plans under which directors, officers, key employees, and consultants of the Company may be granted restricted stock awards, stock options and other equity-based instruments as a means of promoting the Company’s long-term growth and profitability. The plans are intended to encourage participants to contribute to and participate in the success of the Company.

The Company's board of directors adopted, and the Company's stockholders approved, the Amended and Restated 2005 Incentive Stock Plan, or the 2005 Stock Plan, effective January 1, 2008. The total number of shares of common stock authorized for issue pursuant to awards granted under the 2005 Stock Plan was 2,500,000 shares. The 2005 Stock Plan provided for the grant of non-qualified stock options, stock appreciation rights, restricted stock, performance shares, phantom stock, restricted stock units and other awards that are valued in whole or in part by reference to our stock.

On May 9, 2011, the Company's board of directors adopted, and the Company's stockholders approved, the 2011 Equity Incentive Award Plan, or 2011 Plan. Under the 2011 Plan, 3,000,000 new shares of common stock are reserved for issuance pursuant to a variety of stock-based compensation awards, including stock options, stock appreciation rights or SARs, restricted stock awards, restricted stock unit awards, deferred stock awards, dividend equivalent awards, stock payment awards and performance share awards and other stock-based awards, plus the number of shares remaining available for future awards under our 2005 Stock Plan. The number of shares reserved for issuance or transfer pursuant to awards under the 2011 Plan will be increased by the number of shares represented by awards outstanding under our 2005 Stock Plan that are forfeited or lapse unexercised and which, following the effective date of the 2011 Plan, are not issued under the 2005 Stock Plan. No further awards will be granted under the 2005 Stock Plan, and all outstanding awards will continue to be governed by their existing terms. As of June 30, 2012 and December 31, 2011, 2,794,172 and 3,336,614 shares of the Company’s common stock, respectively, remained available for future issuance under the 2011 Plan.

Restricted stock awards are valued at the fair value of the shares on the date of grant if vesting is based on a service or a performance condition. Granted shares vest 25% per year on each anniversary of issuance. Compensation expense is recognized on a straight-line basis over the requisite service period.

Restricted stock unit awards are valued at the fair value of the shares on the date of grant if vesting is based on a service or a performance condition. Granted units vest 25% per year on each anniversary of issuance. Each restricted stock unit represents the right to receive one share of common stock upon vesting of such restricted stock unit. Compensation expense is recognized on a straight-line basis over the requisite service period.

Stock option awards are granted with an exercise price equal to the fair market value of the Company’s common stock at the date of grant, vest over four years of continuous service, and have 10-year contractual terms. The fair value of each stock option award is estimated on the date of grant using the Black Scholes model. There were no options granted during the first two quarters of 2012 or 2011. Expected volatilities are based on the historical volatility of a group of peer entities within the same industry. The expected term of options is based upon the simplified method, which represents the average of the vesting term and the contractual term. The risk-free interest rate is based on U.S. Treasury yields for securities with terms approximating the expected term of the option.

To the extent a market price was not available, the fair value of the Company’s common stock was estimated using a discounted cash flow analysis and market multiples, based on management’s estimates of revenue, driven by assumed market growth rates, and estimated costs as well as appropriate discount rates. These estimates are consistent with the plans and estimates management uses to manage the Company’s business. Share-based compensation cost is included within salaries, wages and benefits in operating expenses in the accompanying statements of operations and amounted to $1.7 million and $0.2 million for the six months endedJune 30, 2012 and 2011, respectively. During the six months endedJune 30, 2012 and 2011, there was no tax benefit recognized in income.

A summary of share option activity under the 2011 Plan as of June 30, 2012 and changes during the six months endedJune 30, 2012 are presented below:

	Number of Shares		Weighted- Average Exercise Price ($)	Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2011	312,000		9.33	8.9	1,946
Granted	—		—
Exercised	(39,125	)	7.80
Forfeited or expired	(3,625	)	7.80
Outstanding at June 30, 2012	269,250		9.58	8.4	2,661
Exercisable at June 30, 2012	55,125		8.43	8.1	608
Vested or expected to vest at June 30, 2012	256,204		9.54	8.4	2,541

The total intrinsic value of share options exercised during the six months endedJune 30, 2012 was $0.5 million.

A summary of the status of the Company’s restricted stock shares (restricted stock awards and restricted stock unit awards) as of June 30, 2012, and changes during the six months endedJune 30, 2012:

	Number of Shares		Weighted-Average Grant Date Fair Value ($)
Outstanding at December 31, 2011	271,999		1.43
Granted	298,692		20.29
Vested	(164,515	)	3.04
Forfeited	(15,125	)	3.79
Outstanding at June 30, 2012	391,051		15.07

There were 298,692 restricted stock units granted during the six months endedJune 30, 2012 and none during the year ended 2011. The total fair value of restricted stock shares vested during the six months endedJune 30, 2012 and 2011 was $3.3 million and $2.2 million, respectively.

As of June 30, 2012 and June 30, 2011, there was $6.3 million and $1.7 million, respectively, of total unrecognized compensation cost related to nonvested restricted stock and options granted under the plan expected to be recognized over a weighted-average period of 3.3 years and 2.5 years, respectively.

Performance Share Awards

During the six months ended June 30, 2012, the Company granted certain senior-level executives restricted stock units that vest based on market and service conditions as part of a long-term incentive plan, which are referred to herein as performance share awards. The number of shares of common stock underlying each award is determined at the end of a three-year performance period. In order to vest, the senior level executive must still be employed by the Company, with certain contractual exclusions, at the end of the performance period. At the end of the performance period, the percentage of the stock units that will vest will be determined by ranking the Company’s total shareholder return compared to the total shareholder return of twelve peer companies. Based on the level of performance, between 0% and 200% of the award may vest. Within 60 days after vesting, the shares underlying the award will be issued to the participant. In the event of a change in control of the Company or the disability or death of a participant, the payout of any award is limited to a prorated portion of such award based upon a performance assessment prior to the change-in-control date or date of disability or death.

The market condition requirements are reflected in the grant date fair value of the award, and the compensation expense for the award will be recognized assuming that the requisite service is rendered regardless of whether the market conditions are achieved.

The grant date fair value of the performance share awards was determined through the use of a Monte Carlo simulation model, which utilizes multiple input variables that determine the probability of satisfying the market condition requirements applicable to each award as follows:

	Weighted-Average at Grant Date
Expected volatility factor	0.39
Risk free interest rate	0.45	%
Expected term (in years)	2.75
Expected dividend yield	—	%

At the time of the Performance Share Award grants, the Company had been public for less than one year; as such, the volatility was based upon a weighted average of the volatility for the Company and the most recent 2.75-year volatility of its peers. The peer group used to calculate volatility is consistent with the group used for the traditional employee stock options. The Company chose to use historical volatility to value these awards because historical stock prices were used to develop the correlation coefficients between the Company and each of the peer companies within the peer group in order to model stock price movements. The volatilities used were calculated over the most recent 2.75-year period, which was the remaining term of the performance period at the date of grant. The risk-free interest rate was based on the implied yield available on U.S. Treasury zero-coupon issues with remaining terms equivalent to the remaining performance period. The Company does not intend to pay dividends on its common stock in the foreseeable future. Accordingly, the Company used a dividend yield of zero in its model.

The following table summarizes the Company’s performance share awards for the six months endedJune 30, 2012:

	Number of Awards	Weighted-Average Fair Value at Grant Date
Outstanding at December 31, 2011	—	$	—
Granted	262,500	32.26
Vested	—	—
Forfeited	—	—
Outstanding at June 30, 2012	262,500	32.26

As of June 30, 2012, there was $7.8 million of total unrecognized compensation cost related to performance share awards. The unrecognized cost is expected to be recognized over 2.51 years.

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Initial Public Offering and Tax Receivable Agreement

6 Months Ended

Jun. 30, 2012

Initial Public Offering and Tax Receivable Agreement [Abstract]

Initial Public Offering

Initial Public Offering and Tax Receivable Agreement

On June 1, 2011, the Company raised $187.2 million of gross proceeds from an initial public offering of 15,600,000 shares of its common stock at a price of $12.00 per share. The resulting proceeds to the Company were approximately $176.9 million, after deducting underwriter commissions. The Company retained $150.0 million of the net proceeds, after paying $20.6 million of debt, $450,000 to pay three unaffiliated holders of its subordinated notes, and $5.9 million in direct costs of the offering. In accordance with a Recapitalization Agreement, all of the principal and accrued and unpaid interest on outstanding notes, to the extent not paid, totaling $279.2 million, as well as all of the Class A and B Preferred Stock outstanding immediately prior to the offering along with accrued and unpaid dividends totaling $81.7 million, were exchanged for 30,079,420 shares of common stock at a share price of $12.00 per share. Each share of Class B Common Stock was exchanged for one share of common stock. In addition, interest expense was reduced by $0.4 million due to a write off of the unamortized portion of prepaid loan fees and deferred interest.

The Company entered into the TRA with the Company's Pre-IPO Stockholders (as defined in the TRA) that became effective immediately prior to the consummation of the IPO. Under the TRA, the Company is obligated to pay to the Pre-IPO Stockholders an amount equal to 90% of the cash savings in federal income tax realized by it 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. Cash tax savings generally will be computed by comparing 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 (as defined in the TRA) 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 term of the TRA will continue 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 of 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. The amount and timing of payments under the TRA will depend 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 Company paid $27.2 million, or 90% of the tax savings realized from the utilization of NOLs in 2011, including $0.3 million of applicable interest in 2012 related to the TRA. As of June 30, 2012, an estimated remaining cash benefit of $9.5 million is expected to be paid to our Pre-IPO Stockholders under the terms of the TRA in 2013.

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Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2012

Payables and Accruals [Abstract]

Accrued liabilities included in other current liabilities

Accrued liabilities included in other current liabilities as of June 30, 2012 and December 31, 2011 consist of the following:

	June 30, 2012		December 31, 2011
	(in thousands)
Federal excise and other passenger taxes and fees payable	$	27,383	$	17,813
Salaries and wages	18,381		17,123
Airport expenses	13,693		10,682
Aircraft maintenance	10,575		7,816
Fuel	10,288		87
Current portion of tax receivable agreement	9,490		27,399
Deferred gain on sale of slots	9,060		—
Aircraft and facility rent	7,096		7,206
Restructuring	234		329
Other	11,279		10,401
Accrued liabilities	$	117,479	$	98,856

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Stock-Based Compensation - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended							6 Months Ended				18 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Dec. 31, 2007 2005 Stock Plan [Member]	Jun. 30, 2012 2011 Equity Incentive Award Plan [Member]	Dec. 31, 2011 2011 Equity Incentive Award Plan [Member]	May 09, 2011 2011 Equity Incentive Award Plan [Member]	Jun. 30, 2012 Stock Options [Member]	Jun. 30, 2011 Stock Options [Member]	Jun. 30, 2012 Restricted Stock [Member]	Jun. 30, 2011 Restricted Stock [Member]	Jun. 30, 2012 Restricted Stock [Member]	Jun. 30, 2012 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2012 Performance Shares Awards [Member]	Jun. 30, 2012 Performance Shares Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issue (in shares)				2,500,000			3,000,000
Shares available for future issuance (in shares)					2,794,172	3,336,614
Award vesting percentage per year (as a percent)										25.00%			25.00%
Grants in period (in shares)								0	0
Award vesting period								4 years
Contractual term								10 years
Issuance window after award vesting															60 days
Share-based compensation cost	$ 1.7		$ 0.2
Potential vesting percentage, minimum (as a percent)															0.00%
Potential vesting percentage, maximum (as a percent)															200.00%
Period used to determine weighted average volatility		2 years 9 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Volatility Analysis Lookback Period														2 years 9 months
Total unrecognized cost, period for recognition (in years)											2 years 6 months	3 years 3 months 18 days			2 years 6 months 4 days
Total unrecognized compensation cost										$ 6.3	$ 1.7	$ 6.3		$ 7.8	$ 7.8

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Special Charges (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	18 Months Ended		0 Months Ended	6 Months Ended
	Jun. 30, 2012 Secondary Offering Costs [Member]	Jun. 30, 2012 Secondary Offering Costs [Member]	Jan. 25, 2012 Secondary Offering Costs [Member]	Jun. 02, 2011 Initial Public Offering Costs [Member]	Jun. 30, 2011 Initial Public Offering Costs [Member]	Jun. 30, 2011 Initial Public Offering Costs [Member] Indigo Partners, LLC [Member]	Jun. 30, 2011 Initial Public Offering Costs [Member] Unaffiliated Debt Holders [Member]
Restructuring Cost and Reserve [Line Items]
Shares sold by certain stockholders in secondary offering (in shares)			12,650,000
Payments of stock issuance costs	$ 0.5	$ 1.3
Stock issuance cost reimbursements	0.5
Shares issued in public offering (in shares)				15,600,000
Incurred costs					$ 2.3	$ 1.8	$ 0.5

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Commitments and Contingencies - Employees (Details) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Unionized Employees Concentration Risk [Member] Workforce Subject to Collective Bargaining Arrangements [Member]	Jun. 30, 2012 Unionized Employees Concentration Risk [Member] Workforce Subject to Collective Bargaining Arrangements [Member] Air Line Pilots Association, International [Member]	Jun. 30, 2012 Unionized Employees Concentration Risk [Member] Workforce Subject to Collective Bargaining Arrangements [Member] Association of Flight Attendants [Member]	Jun. 30, 2012 Unionized Employees Concentration Risk [Member] Workforce Subject to Collective Bargaining Arrangements [Member] Transport Workers Union [Member]
Multiemployer Plans [Line Items]
Company's employees covered under collective bargaining agreements (as a percent)			53.00%	21.00%	31.00%	1.00%
Accrued health care claims	$ 1.7	$ 2.0

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Basis Of Presentation

6 Months Ended

Jun. 30, 2012

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 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.

Certain prior period amounts have been reclassified to conform to the current year's presentation. For the year ended December 31, 2011, long-term deferred income taxes have been broken out separately from deferred credits and other long-term liabilities in the accompanying Condensed Balance Sheets.

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Financial Instruments and Risk Management

6 Months Ended

Jun. 30, 2012

Investments, All Other Investments [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, the counterparty credit ratings, and the historical performance of the counterparties relating to hedge 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.

The Company records financial derivative instruments at fair value, which includes an evaluation of the counterparty credit risk. Fair value of the instruments is determined using standard option valuation models.

Management chose not to elect hedge accounting on any derivative instruments during the six months endedJune 30, 2012 and 2011 and, as a result, changes in the fair value of these fuel hedge contracts are recorded each period in aircraft fuel expense.

The following table summarizes the components of aircraft fuel expense for the three and six months ended June 30, 2012 and 2011:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in millions)
Into-plane fuel cost	$	116.6	$	107.0	$	227.5	$	192.6
Changes in value and settlements of fuel hedge contracts	3.6		0.3		1.4		(4.3		)
Aircraft fuel expense	$	120.2	$	107.3	$	229.0	$	188.2

During the three months ended June 30, 2012, $3.6 million of net fuel derivative losses were recognized, consisting of realized losses of $2.5 million and unrealized losses of $1.1 million. During the three months ended June 30, 2011, $0.3 million of net fuel derivative losses were recognized, consisting of realized gains of $3.1 million offset by unrealized losses of $3.5 million. During the six months endedJune 30, 2012, $1.4 million of net fuel derivative losses were recognized, consisting of realized losses of $37 thousand and unrealized losses of $1.4 million. During the six months endedJune 30, 2011, $4.3 million of net fuel derivative gains were recognized, consisting of realized gains of $7.2 million offset by unrealized losses of $2.9 million. Changes in the fair value of such derivative contracts were recorded within aircraft fuel expense in the accompanying statements of operations. These amounts include both realized gains and losses and mark-to-market adjustments of the fair value of unsettled derivative instruments at the end of each period.

As of June 30, 2012 and December 31, 2011, the Company had fuel hedges using U.S. Gulf Coast jet fuel collars as the underlying commodity. As of June 30, 2012, the Company had agreements in place to protect 7.5 million gallons, or approximately 19% of its estimated fuel consumption for the third quarter of 2012, at a weighted-average ceiling and floor price of $3.16 and $2.95 per gallon, respectively. As of June 30, 2012, the Company did not have any of these fuel hedges in place for the fourth quarter of 2012 and beyond. As of December 31, 2011, the Company had agreements in place to protect 13.5 million gallons or approximately 9% of its estimated fuel consumption for the twelve months ended December 31, 2012 at a weighted-average ceiling and floor price of $2.99 and $2.81 per gallon, respectively. Additionally, during peak hurricane season (August through October), the Company enters into basis swap agreements using NYMEX Heating Oil indexes to protect the refining price risk between the price of crude oil and the price of refined jet fuel. As of June 30, 2012, the Company had approximately 72% of its August through October 2012 forecasted refining risk protected using these basis swaps.

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 415.0	$ 343.3
Total assets	415.4	344.3
Total liabilities	1.4	0.7
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	415.0	343.3
Total assets	415.0	343.3
Total liabilities	0	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 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	1.0
Total liabilities	1.4	0.7
Basis swaps [Member] | Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0.3
Basis swaps [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Basis swaps [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Basis swaps [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0.3
Option contracts [Member] | Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0.1	1.0
Derivative liabilities	1.4	0.7
Option contracts [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Option contracts [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Option contracts [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0.1	1.0
Derivative liabilities	$ 1.4	$ 0.7

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of share option activity

A summary of share option activity under the 2011 Plan as of June 30, 2012 and changes during the six months endedJune 30, 2012 are presented below:

	Number of Shares		Weighted- Average Exercise Price ($)	Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value ($000)
Outstanding at December 31, 2011	312,000		9.33	8.9	1,946
Granted	—		—
Exercised	(39,125	)	7.80
Forfeited or expired	(3,625	)	7.80
Outstanding at June 30, 2012	269,250		9.58	8.4	2,661
Exercisable at June 30, 2012	55,125		8.43	8.1	608
Vested or expected to vest at June 30, 2012	256,204		9.54	8.4	2,541

Summary of the status of the Company's restricted stock shares

A summary of the status of the Company’s restricted stock shares (restricted stock awards and restricted stock unit awards) as of June 30, 2012, and changes during the six months endedJune 30, 2012:

	Number of Shares		Weighted-Average Grant Date Fair Value ($)
Outstanding at December 31, 2011	271,999		1.43
Granted	298,692		20.29
Vested	(164,515	)	3.04
Forfeited	(15,125	)	3.79
Outstanding at June 30, 2012	391,051		15.07

Multiple input variables of performance share awards

The grant date fair value of the performance share awards was determined through the use of a Monte Carlo simulation model, which utilizes multiple input variables that determine the probability of satisfying the market condition requirements applicable to each award as follows:

	Weighted-Average at Grant Date
Expected volatility factor	0.39
Risk free interest rate	0.45	%
Expected term (in years)	2.75
Expected dividend yield	—	%

Performance share award activity

The following table summarizes the Company’s performance share awards for the six months endedJune 30, 2012:

	Number of Awards	Weighted-Average Fair Value at Grant Date
Outstanding at December 31, 2011	—	$	—
Granted	262,500	32.26
Vested	—	—
Forfeited	—	—
Outstanding at June 30, 2012	262,500	32.26