Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating revenues:
Total operating revenues	$ 967	$ 909	$ 1,815	$ 1,514
Operating expenses:
Aircraft fuel	244	335	536	550
Salaries, wages and benefits	211	174	414	346
Aircraft rent	148	133	279	261
Station operations	124	120	248	225
Sales and marketing	44	46	84	78
Maintenance, materials and repairs	52	31	97	65
Depreciation and amortization	12	15	23	28
Transaction and merger-related costs	0	9	1	20
Other operating	53	39	79	87
Total operating expenses	888	902	1,761	1,660
Operating income (loss)	79	7	54	(146)
Other income (expense):
Interest expense	(7)	(3)	(13)	(12)
Capitalized interest	6	2	12	3
Interest income and other	10	2	18	2
Total other income (expense)	9	1	17	(7)
Income (loss) before income taxes	88	8	71	(153)
Income tax expense (benefit)	17	(5)	13	(45)
Net income (loss)	$ 71	$ 13	$ 58	$ (108)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.32	$ 0.06	$ 0.26	$ (0.49)
Diluted (in dollars per share)	$ 0.31	$ 0.06	$ 0.26	$ (0.49)
Passenger
Operating revenues:
Total operating revenues	$ 945	$ 890	$ 1,775	$ 1,478
Other
Operating revenues:
Total operating revenues	$ 22	$ 19	$ 40	$ 36