Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating revenues:
Total operating revenues	$ 1,432,472	$ 1,366,643	$ 2,782,246	$ 2,333,958
Operating expenses:
Aircraft fuel	391,032	558,633	878,743	927,218
Salaries, wages and benefits	407,705	308,634	796,890	614,524
Landing fees and other rents	106,487	92,021	203,832	174,957
Depreciation and amortization	80,542	76,469	158,533	152,660
Aircraft rent	92,101	68,632	177,368	134,676
Maintenance, materials and repairs	56,825	45,407	111,239	90,922
Distribution	50,701	48,724	98,718	84,075
Special charges	19,972	18,004	33,955	33,567
Loss on disposal of assets	802	10,636	7,902	22,188
Other operating	206,094	184,813	407,250	355,969
Total operating expenses	1,412,261	1,411,973	2,874,430	2,590,756
Operating income (loss)	20,211	(45,330)	(92,184)	(256,798)
Other (income) expense:
Interest expense	28,880	30,124	80,673	68,004
Capitalized interest	(8,445)	(5,677)	(16,093)	(10,939)
Interest income	(15,962)	(2,561)	(31,396)	(3,028)
Other (income) expense	766	296	1,308	713
Total other (income) expense	5,239	22,182	34,492	54,750
Income (loss) before income taxes	14,972	(67,512)	(126,676)	(311,548)
Provision (benefit) for income taxes	17,321	(15,106)	(20,416)	(64,439)
Net income (loss)	$ (2,349)	$ (52,406)	$ (106,260)	$ (247,109)
Basic earnings (loss) per share (in dollars per share)	$ (0.02)	$ (0.48)	$ (0.97)	$ (2.27)
Diluted earnings (loss) per share (in dollars per share)	$ (0.02)	$ (0.48)	$ (0.97)	$ (2.27)
Passenger
Operating revenues:
Total operating revenues	$ 1,410,061	$ 1,347,871	$ 2,737,534	$ 2,297,615
Other
Operating revenues:
Total operating revenues	$ 22,411	$ 18,772	$ 44,712	$ 36,343