Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating revenues:
Total operating revenues	$ 859,309	$ 138,529	$ 1,320,588	$ 909,610
Operating expenses:
Salaries, wages and benefits	257,236	213,579	502,928	454,059
Aircraft fuel	214,825	19,910	357,755	233,118
Depreciation and amortization	73,703	69,113	148,015	135,104
Landing fees and other rents	81,497	40,348	153,605	107,469
Aircraft rent	64,641	49,256	119,423	94,402
Maintenance, materials and repairs	39,639	19,227	69,542	53,303
Distribution	35,263	11,352	58,905	45,095
Loss on disposal of assets	189	0	1,306	0
Special credits	(115,002)	(151,911)	(291,940)	(151,911)
Other operating	114,107	58,039	210,368	187,347
Total operating expenses	766,098	328,913	1,329,907	1,157,986
Operating income (loss)	93,211	(190,384)	(9,319)	(248,376)
Other (income) expense:
Interest expense	39,662	27,792	84,468	51,670
Loss on extinguishment of debt	331,630	0	331,630	0
Capitalized interest	(4,631)	(3,757)	(9,363)	(7,421)
Interest income	(373)	(1,949)	(4,744)	(5,542)
Other (income) expense	233	66	181	47
Total other (income) expense	366,521	22,152	402,172	38,754
Income (loss) before income taxes	(273,310)	(212,536)	(411,491)	(287,130)
Provision (benefit) for income taxes	14,553	(68,108)	(11,307)	(114,874)
Net loss	$ (287,863)	$ (144,428)	$ (400,184)	$ (172,256)
Basic loss per share (in dollars per share)	$ (2.73)	$ (1.81)	$ (3.94)	$ (2.33)
Diluted loss per share (in dollars per share)	$ (2.73)	$ (1.81)	$ (3.94)	$ (2.33)
Total passenger revenues
Operating revenues:
Total operating revenues	$ 846,507	$ 130,817	$ 1,296,842	$ 884,367
Other
Operating revenues:
Total operating revenues	$ 12,802	$ 7,712	$ 23,746	$ 25,243