Segment Reporting (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting
Number of reporting segments | segment	2
Operating revenues	$ 2,935,432	$ 3,004,925	$ 2,713,491
Operating expense	2,831,363	2,823,763	2,437,624
Depreciation and amortization expense	383,115	394,552	440,198
Special items - impairment charges			84,592
Interest expense	130,930	127,083	123,122
Segment profit (loss)	(26,861)	54,079	152,745
Total assets	7,026,293	7,414,553	7,125,947
Capital expenditures (including non-cash)	263,909	662,317	567,037
SkyWest Airlines
Segment Reporting
Operating revenues	2,392,174	2,492,318	2,192,432
Operating expense	2,566,946	2,525,076	2,177,524
Depreciation and amortization expense	149,264	182,475	210,281
Special items - impairment charges			84,592
Interest expense	17,053	12,805	13,360
Segment profit (loss)	(191,825)	(45,563)	1,548
Total assets	2,537,834	2,977,804	2,957,745
Capital expenditures (including non-cash)	113,783	82,891	128,712
SkyWest Leasing
Segment Reporting
Operating revenues	543,258	512,607	521,059
Operating expense	264,417	298,687	260,100
Depreciation and amortization expense	233,851	212,077	229,917
Interest expense	113,877	114,278	109,762
Segment profit (loss)	164,964	99,642	151,197
Total assets	4,488,459	4,436,749	4,168,202
Capital expenditures (including non-cash)	$ 150,126	$ 579,426	$ 438,325