v3.26.1
Segment Reporting (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
segment
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Segment Reporting          
Number of reporting segments | segment     2    
Operating revenues $ 1,102,751 $ 1,035,227 $ 2,115,928 $ 1,983,682  
Salaries, wages and benefits 426,826 390,243 848,930 767,554  
Aircraft maintenance, materials and repairs 242,928 238,885 455,955 447,985  
Depreciation and amortization 92,497 90,150 182,713 179,596  
Interest expense 24,926 26,566 49,391 53,684  
Other segment expense (income) items $ 176,720 $ 126,267 $ 332,315 $ 251,029  
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 $ 138,854 $ 163,116 $ 246,624 $ 283,834  
Total assets 7,412,230 7,174,083 7,412,230 7,174,083 $ 7,386,249
Capital expenditures (including non-cash) 140,987 139,473 271,116 258,389  
Deposits paid on aircraft 5,845 25,938 12,302 31,078  
SkyWest Airlines and SWC          
Segment Reporting          
Operating revenues 940,655 869,336 1,795,837 1,670,987  
Salaries, wages and benefits 426,161 389,578 847,600 766,224  
Aircraft maintenance, materials and repairs 231,121 216,609 437,613 418,085  
Depreciation and amortization 40,434 39,005 77,780 76,753  
Interest expense 3,758 3,187 6,493 6,168  
Other segment expense (income) items 180,988 130,696 342,648 259,226  
Segment profit 58,193 90,261 83,703 144,531  
Total assets 3,345,993 3,086,209 3,345,993 3,086,209  
Capital expenditures (including non-cash) 117,868 74,315 228,548 193,231  
SkyWest Leasing          
Segment Reporting          
Operating revenues 162,096 165,891 320,091 312,695  
Salaries, wages and benefits 665 665 1,330 1,330  
Aircraft maintenance, materials and repairs 11,807 22,276 18,342 29,900  
Depreciation and amortization 52,063 51,145 104,933 102,843  
Interest expense 21,168 23,379 42,898 47,516  
Other segment expense (income) items (4,268) (4,429) (10,333) (8,197)  
Segment profit 80,661 72,855 162,921 139,303  
Total assets 4,066,237 4,087,874 4,066,237 4,087,874  
Capital expenditures (including non-cash) 23,119 65,158 42,568 65,158  
Deposits paid on aircraft $ 5,845 $ 25,938 $ 12,302 $ 31,078