Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ (121,000,000)	$ (91,000,000)
Deferred income taxes	(40,000,000)	(22,000,000)
Depreciation and amortization	13,000,000	8,000,000
Gains recognized on sale-leaseback transactions	(7,000,000)	(15,000,000)
Loss on extinguishment of debt	7,000,000	0
Warrant liability unrealized loss	0	20,000,000
Stock-based compensation	3,000,000	3,000,000
Changes in operating assets and liabilities:
Accounts receivable	(9,000,000)	(20,000,000)
Supplies and other current assets	(13,000,000)	(13,000,000)
Aircraft maintenance deposits	(4,000,000)	(4,000,000)
Other long-term assets	(17,000,000)	(8,000,000)
Accounts payable	5,000,000	6,000,000
Air traffic liability	90,000,000	95,000,000
Other liabilities	6,000,000	71,000,000
Cash provided by (used in) operating activities	(87,000,000)	30,000,000
Cash flows from investing activities:
Capital expenditures	(7,000,000)	(3,000,000)
Pre-delivery deposits for flight equipment, net of refunds	(25,000,000)	12,000,000
Other	(1,000,000)	(2,000,000)
Cash provided by (used in) investing activities	(33,000,000)	7,000,000
Cash flows from financing activities:
Proceeds from issuance of debt	97,000,000	26,000,000
Principal repayments on debt	(165,000,000)	(22,000,000)
Proceeds from sale-leaseback transactions	0	13,000,000
Minimum tax withholdings on share-based awards	(3,000,000)	(3,000,000)
Cash provided by (used in) financing activities	(71,000,000)	14,000,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(191,000,000)	51,000,000
Cash, cash equivalents and restricted cash, beginning of period	918,000,000	378,000,000
Cash, cash equivalents and restricted cash, end of period	$ 727,000,000	$ 429,000,000