Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting
Number of reporting segments | segment	2
Operating revenues	$ 803,614	$ 691,831
Operating expense	704,108	696,535
Depreciation and amortization expense	95,870	94,149
Interest expense	29,829	33,620
Segment profit	69,677	(38,324)
Total assets	6,982,743	7,233,761	$ 7,026,293
Capital expenditures (including non-cash)	44,350	107,921
SkyWest Airlines and SWC
Segment Reporting
Operating revenues	646,809	568,173
Operating expense	641,363	633,392
Depreciation and amortization expense	36,108	38,258
Interest expense	3,476	4,062
Segment profit	1,970	(69,281)
Total assets	2,608,104	2,629,521
Capital expenditures (including non-cash)	44,350	21,111
SkyWest Leasing
Segment Reporting
Operating revenues	156,805	123,658
Operating expense	62,745	63,143
Depreciation and amortization expense	59,762	55,891
Interest expense	26,353	29,558
Segment profit	67,707	30,957
Total assets	$ 4,374,639	4,604,240
Capital expenditures (including non-cash)		$ 86,810