Consolidated Statement of Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING REVENUES:
Total operating revenues	$ 26,091	$ 23,814	$ 15,790
OPERATING EXPENSES, NET:
Salaries, wages, and benefits	11,152	9,376	7,743
Payroll support and voluntary Employee programs, net	0	0	(2,960)
Fuel and oil	6,217	5,975	3,310
Maintenance materials and repairs	1,188	852	854
Landing fees and airport rentals	1,789	1,508	1,456
Depreciation and amortization	1,522	1,351	1,272
Other operating expenses	3,999	3,735	2,394
Total operating expenses, net	25,867	22,797	14,069
OPERATING INCOME	224	1,017	1,721
OTHER EXPENSES (INCOME):
Interest expense	259	340	467
Capitalized interest	(23)	(39)	(36)
Interest income	(583)	(217)	(13)
Loss on extinguishment	0	193	28
Other (gains) losses, net	62	(12)	50
Total other expenses (income)	(409)	289	396
INCOME BEFORE INCOME TAXES	633	728	1,325
PROVISION FOR INCOME TAXES	168	189	348
NET INCOME	$ 465	$ 539	$ 977
NET INCOME (LOSS) PER SHARE, BASIC (in USD per share)	$ 0.78	$ 0.91	$ 1.65
NET INCOME (LOSS) PER SHARE, DILUTED (in USD per share)	$ 0.76	$ 0.87	$ 1.61
Passenger
OPERATING REVENUES:
Total operating revenues	$ 23,637	$ 21,408	$ 14,066
Freight
OPERATING REVENUES:
Total operating revenues	175	177	187
Other
OPERATING REVENUES:
Total operating revenues	$ 2,279	$ 2,229	$ 1,537