
	Fair Value Measurements

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

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

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

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

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes several valuation techniques in order to assess the fair value of the Company’s financial assets and liabilities. The Company's derivative contracts generally consist of jet fuel swaps and jet fuel options. These instruments are valued using energy and commodity market data, which is derived by combining raw inputs with quantitative models and processes to generate forward curves and volatilities.

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

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



	Fair Value Measurements as of September 30, 2013
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	540.2	$	540.2	$	—	$	—
Jet fuel swaps	1.7		—		1.7		—
Total assets	$	541.9	$	540.2	$	1.7	$	—

Jet fuel swaps	$	4.9	$	—	$	4.9	$	—
Total liabilities	$	4.9	$	—	$	4.9	$	—



	Fair Value Measurements as of December 31, 2012
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	416.8	$	416.8	$	—	$	—
Jet fuel options	0.3		—		—		0.3
Total assets	$	417.1	$	416.8	$	—	$	0.3

Total liabilities	$	—	$	—	$	—	$	—

Cash and cash equivalents at September 30, 2013 and December 31, 2012 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 nine months ended September 30, 2013 and the year ended December 31, 2012.

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. Within the Condensed Balance Sheets, the Company offsets fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. All derivative instruments are presented on a gross basis in the table above. The Company determines the fair value of jet fuel options utilizing an option pricing model based on inputs that are either readily available in public markets or can be derived from information available in publicly quoted markets. The Company has consistently applied these valuation techniques in all periods presented and believes it has obtained the most accurate information available for the types of derivative contracts it holds.

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

The Company'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 Finance 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 gross fair value on a recurring basis using significant unobservable inputs (Level 3):



	Jet Fuel Option Activity for the Three Months Ended September 30, 2013
	(in millions)
Balance at June 30, 2013	$	(0.3	)
Total realized or unrealized gains (losses) included in earnings, net	0.5
Settlements, net	(0.2		)
Balance at September 30, 2013	$	—



	Jet Fuel Option Activity for the Nine Months Ended September 30, 2013
	(in millions)
Balance at December 31, 2012	$	0.3
Total realized or unrealized gains (losses) included in earnings, net	0.1
Settlements, net	(0.4		)
Balance at September 30, 2013	$	—

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