Segment Reporting (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting
Number of reporting segments | segment	2
Operating revenues	$ 4,058,202	$ 3,527,920	$ 2,935,432
Salaries, wages and benefits	1,559,356	1,463,932	1,322,615
Aircraft maintenance, materials and repairs	943,779	712,642	673,453
Depreciation and amortization	364,497	383,880	383,115
Interest expense	104,445	114,340	130,930
Other segment expense (income) items	520,534	420,983	385,010
Segment profit (loss)	565,591	432,143	40,309
Total assets	7,386,249	7,139,867	7,026,293
Capital expenditures (including non-cash)	548,984	439,220	263,909
SkyWest Airlines
Segment Reporting
Operating revenues	3,415,066	2,905,339	2,392,174
Salaries, wages and benefits	1,556,695	1,461,271	1,319,954
Aircraft maintenance, materials and repairs	877,369	684,805	657,392
Depreciation and amortization	157,560	145,052	149,264
Interest expense	11,698	12,916	17,053
Other segment expense (income) items	548,776	462,404	413,722
Segment profit (loss)	262,968	138,891	(165,211)
Total assets	3,244,166	2,810,521	2,537,834
Capital expenditures (including non-cash)	366,362	310,636	113,783
SkyWest Leasing
Segment Reporting
Operating revenues	643,136	622,581	543,258
Salaries, wages and benefits	2,661	2,661	2,661
Aircraft maintenance, materials and repairs	66,410	27,837	16,061
Depreciation and amortization	206,937	238,828	233,851
Interest expense	92,747	101,424	113,877
Other segment expense (income) items	(28,242)	(41,421)	(28,712)
Segment profit (loss)	302,623	293,252	205,520
Total assets	4,142,083	4,329,346	4,488,459
Capital expenditures (including non-cash)	$ 182,622	$ 128,584	$ 150,126