Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 250,494,000	$ 902,057,000
Restricted cash	396,103,000	168,390,000
Short-term investment securities	0	118,334,000
Accounts receivable, net	114,386,000	178,955,000
Prepaid expenses and other current assets	306,263,000	278,366,000
Assets held for sale	3,119,000	463,020,000
Total current assets	1,070,365,000	2,109,122,000
Property and equipment:
Flight equipment	2,165,717,000	2,736,461,000
Other property and equipment	444,917,000	783,645,000
Less accumulated depreciation	(89,476,000)	(1,027,872,000)
Total property and equipment, net	2,521,158,000	2,492,234,000
Operating lease right-of-use assets	4,646,002,000	4,583,734,000
Intangible assets	83,482,000	550,000
Pre-delivery deposits on flight equipment	75,376,000	113,493,000
Deferred heavy maintenance, net	110,568,000	241,094,000
Other long-term assets	288,093,000	54,951,000
Total assets	8,795,044,000	9,595,178,000
Current liabilities:
Accounts payable	149,270,000	32,385,000
Air traffic liability	373,096,000	436,813,000
Current maturities of long-term debt, net, and finance leases	119,226,000	436,532,000
Current maturities of operating leases	4,201,000	257,796,000
Other current liabilities	364,383,000	605,839,000
Total current liabilities	1,010,176,000	1,769,365,000
Long-term debt, net and finance leases, less current maturities	750,205,000	1,761,215,000
Operating leases, less current maturities	18,426,000	4,335,106,000
Deferred income taxes	65,988,000	51,927,000
Deferred gains and other long-term liabilities	94,286,000	122,595,000
Liabilities subject to compromise	6,691,470,000	1,635,104,000
Shareholders’ equity (deficit):
Common stock	3,000	11,000
Additional paid-in-capital	738,733,000	1,173,692,000
Treasury stock, at cost	0	(81,285,000)
Retained earnings (deficit)	(574,243,000)	(1,172,740,000)
Accumulated other comprehensive income (loss)	0	188,000
Total shareholders’ equity (deficit)	164,493,000	(80,134,000)
Total liabilities and shareholders’ equity (deficit)	$ 8,795,044,000	$ 9,595,178,000