v3.26.3
Segment Reporting (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting          
Number of reporting segments | segment     2    
Operating revenues $ 1,117,355 $ 1,050,029 $ 3,233,283 $ 3,033,711  
Salaries, wages and benefits 429,747 391,634 1,278,677 1,159,188  
Aircraft maintenance, materials and repairs 239,427 247,978 695,382 695,963  
Depreciation and amortization 76,280 92,474 258,993 272,070  
Interest expense 24,635 25,611 74,026 79,295  
Other segment expense (income) items $ 187,779 $ 135,163 $ 520,094 $ 386,192  
Segment Reporting, Other Segment Item, Composition, Description Other segment items include aircraft fuel; airport related expenses; other operating expenses consisting primarily of property taxes, hull and liability insurance, simulator costs, aircraft rentals, crew per diem and crew hotel costs; interest income and other income (expense), net. Other segment items include aircraft fuel; airport related expenses; other operating expenses consisting primarily of property taxes, hull and liability insurance, simulator costs, aircraft rentals, crew per diem and crew hotel costs; interest income and other income (expense), net. Other segment items include aircraft fuel; airport related expenses; other operating expenses consisting primarily of property taxes, hull and liability insurance, simulator costs, aircraft rentals, crew per diem and crew hotel costs; interest income and other income (expense), net. Other segment items include aircraft fuel; airport related expenses; other operating expenses consisting primarily of property taxes, hull and liability insurance, simulator costs, aircraft rentals, crew per diem and crew hotel costs; interest income and other income (expense), net.  
Segment profit $ 159,487 $ 157,169 $ 406,111 $ 441,003  
Total assets 7,508,746 7,214,196 7,508,746 7,214,196 $ 7,386,249
Capital expenditures (including non-cash) 173,419 55,395 444,535 313,784  
Deposits paid on aircraft 17,535   29,837 31,078  
SkyWest Airlines and SWC          
Segment Reporting          
Operating revenues 961,124 892,618 2,756,961 2,563,605  
Salaries, wages and benefits 429,082 390,969 1,276,682 1,157,193  
Aircraft maintenance, materials and repairs 233,736 236,745 671,349 654,830  
Depreciation and amortization 40,662 40,778 118,442 117,531  
Interest expense 3,805 2,662 10,298 8,830  
Other segment expense (income) items 194,995 144,963 537,643 404,189  
Segment profit 58,844 76,501 142,547 221,032  
Total assets 3,364,320 3,160,752 3,364,320 3,160,752  
Capital expenditures (including non-cash) 90,435 39,836 318,983 233,067  
SkyWest Leasing          
Segment Reporting          
Operating revenues 156,231 157,411 476,322 470,106  
Salaries, wages and benefits 665 665 1,995 1,995  
Aircraft maintenance, materials and repairs 5,691 11,233 24,033 41,133  
Depreciation and amortization 35,618 51,696 140,551 154,539  
Interest expense 20,830 22,949 63,728 70,465  
Other segment expense (income) items (7,216) (9,800) (17,549) (17,997)  
Segment profit 100,643 80,668 263,564 219,971  
Total assets 4,144,426 4,053,444 4,144,426 4,053,444  
Capital expenditures (including non-cash) 82,984 $ 15,559 125,552 80,717  
Deposits paid on aircraft $ 17,535   $ 29,837 $ 31,078