Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenues:
Total operating revenues	$ 1,258,543	$ 1,343,179	$ 4,040,789	$ 3,677,137
Operating expenses:
Aircraft fuel	455,241	508,496	1,333,984	1,435,714
Salaries, wages and benefits	404,177	311,957	1,201,067	926,481
Landing fees and other rents	107,525	95,174	311,357	270,131
Depreciation and amortization	82,802	78,184	241,335	230,844
Aircraft rent	97,393	75,332	274,761	210,008
Maintenance, materials and repairs	56,465	45,126	167,704	136,048
Distribution	46,323	47,385	145,041	131,460
Special charges	12,378	38,359	46,333	71,926
Loss (gain) on disposal of assets	(2,250)	9,374	5,652	31,562
Other operating	187,249	170,182	594,499	526,151
Total operating expenses	1,447,303	1,379,569	4,321,733	3,970,325
Operating income (loss)	(188,760)	(36,390)	(280,944)	(293,188)
Other (income) expense:
Interest expense	41,260	23,708	121,933	91,712
Capitalized interest	(8,582)	(5,964)	(24,675)	(16,903)
Interest income	(18,442)	(5,642)	(49,838)	(8,670)
Other (income) expense	649	402	1,957	1,115
Total other (income) expense	14,885	12,504	49,377	67,254
Income (loss) before income taxes	(203,645)	(48,894)	(330,321)	(360,442)
Provision (benefit) for income taxes	(46,093)	(12,517)	(66,509)	(76,956)
Net income (loss)	$ (157,552)	$ (36,377)	$ (263,812)	$ (283,486)
Basic earnings (loss) per share (in dollars per share)	$ (1.44)	$ (0.33)	$ (2.42)	$ (2.61)
Diluted earnings (loss) per share (in dollars per share)	$ (1.44)	$ (0.33)	$ (2.42)	$ (2.61)
Passenger
Operating revenues:
Total operating revenues	$ 1,233,912	$ 1,322,079	$ 3,971,446	$ 3,619,694
Other
Operating revenues:
Total operating revenues	$ 24,631	$ 21,100	$ 69,343	$ 57,443