Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) segment	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Segment Reporting
Number of reporting segments | segment	2
Operating revenues	$ 948,455	$ 803,614
Salaries, wages and benefits	377,311	350,999
Aircraft maintenance, materials and repairs	209,100	145,415
Depreciation and amortization expense	89,446	95,870
Interest expense	27,118	29,829
Operating expense	809,078	704,108
Other segment items	124,762	101,326
Segment profit	120,718	80,175
Total assets	7,114,266	6,982,743	$ 7,139,867
Capital expenditures (including non-cash)	118,916	44,350
SkyWest Airlines and SWC
Segment Reporting
Operating revenues	801,651	646,809
Salaries, wages and benefits	376,646	350,334
Aircraft maintenance, materials and repairs	201,476	141,090
Depreciation and amortization expense	37,748	36,108
Interest expense	2,981	3,476
Other segment items	128,530	110,805
Segment profit	54,270	4,996
Total assets	3,040,242	2,608,104
Capital expenditures (including non-cash)	118,916	44,350
SkyWest Leasing
Segment Reporting
Operating revenues	146,804	156,805
Salaries, wages and benefits	665	665
Aircraft maintenance, materials and repairs	7,624	4,325
Depreciation and amortization expense	51,698	59,762
Interest expense	24,137	26,353
Other segment items	(3,768)	(9,479)
Segment profit	66,448	75,179
Total assets	$ 4,074,024	$ 4,374,639