v3.26.1
Long-Term Debt - Narrative (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2022
USD ($)
Jun. 30, 2026
USD ($)
Aircraft
Jun. 30, 2026
USD ($)
Aircraft
Jul. 31, 2026
USD ($)
Jul. 01, 2026
Aircraft
May 31, 2026
USD ($)
May 13, 2026
USD ($)
Apr. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Nov. 30, 2023
USD ($)
Mar. 31, 2022
Aircraft
Mar. 31, 2021
USD ($)
Dec. 31, 2019
USD ($)
Aircraft
Debt Instrument [Line Items]                              
Number Of Aircraft | Aircraft   13 13                   13   13
Term Loan Facility, Fair Value                     $ 103,600        
Finance Lease, Liability   $ 648,611 $ 648,611       $ 263,200     $ 403,060          
Equipment Notes Outstanding, Fair Value Amount                     $ 102,100       $ 101,400
Subsequent Event                              
Debt Instrument [Line Items]                              
Number Of Boeing Aircrafts | Aircraft         2                    
Minimum [Member]                              
Debt Instrument [Line Items]                              
Debt instrument, interest rate, stated percentage   4.44% 4.44%                        
Maximum [Member]                              
Debt Instrument [Line Items]                              
Debt instrument, interest rate, stated percentage   7.02% 7.02%                        
Sun Country Airlines                              
Debt Instrument [Line Items]                              
Business Combination, Recognized Liability Assumed, Lease Obligation   $ 570,300 $ 570,300                        
Revolving Credit Facility                              
Debt Instrument [Line Items]                              
Line of credit facility, maximum borrowing capacity                   $ 150,000       $ 100,000  
Revolving Credit Facility | Other Secured Debt                              
Debt Instrument [Line Items]                              
Line of credit facility, maximum borrowing capacity                       $ 158,000      
Line of Credit Facility, Remaining Borrowing Capacity   25,100 25,100                        
Repayments of lines of credit   13,800 132,600                        
Senior Secured Revolving Loan Facility | Barclays Bank PLC                              
Debt Instrument [Line Items]                              
Long-term line of credit $ 75,000                            
Line of Credit Facility, Expiration Period 57 months                            
Secured Debt                              
Debt Instrument [Line Items]                              
Debt instrument, face amount                 $ 20,500            
Line of Credit | Revolving Credit Facility | Credit Agreement - CANSB / CANSB-1                              
Debt Instrument [Line Items]                              
Line of credit facility, maximum borrowing capacity               $ 176,000              
Long-term line of credit   44,000 44,000                        
Line of Credit Facility, Remaining Borrowing Capacity   $ 132,000 132,000                        
Debt instrument, term   10 years                          
Line of Credit | Revolving Credit Facility | Credit Agreement - SMTB3                              
Debt Instrument [Line Items]                              
Line of credit facility, maximum borrowing capacity               $ 115,000              
Long-term line of credit   $ 115,000 115,000                        
Debt instrument, term   3 years                          
Line of Credit | Revolving Credit Facility | Credit Agreement - DBJ2 / DBJ2-1                              
Debt Instrument [Line Items]                              
Line of credit facility, maximum borrowing capacity           $ 85,600                  
Long-term line of credit   $ 40,600 40,600                        
Line of Credit Facility, Remaining Borrowing Capacity   $ 45,000 45,000                        
Debt instrument, term   12 years                          
Senior Notes | Senior Secured Notes Due 2031                              
Debt Instrument [Line Items]                              
Debt instrument, face amount   $ 650,000 $ 650,000                        
Debt instrument, interest rate, stated percentage   7.125% 7.125%                        
Debt Instrument, Convertible, Liquidation Preference, Value   $ 300,000 $ 300,000                        
Debt Instrument, Convertible, Liquidation Preference, Percentage   2.00% 2.00%                        
Senior Notes | Senior Secured Notes Due 2027                              
Debt Instrument [Line Items]                              
Debt instrument, interest rate, stated percentage   7.25% 7.25%                        
Debt Instrument, Redemption Amount   $ 377,500 $ 377,500                        
Senior Notes | Senior Secured Notes Due 2027 | Subsequent Event                              
Debt Instrument [Line Items]                              
Debt instrument, interest rate, stated percentage       7.25%                      
Debt Instrument, Repurchased Face Amount       $ 17,400                      
Senior Notes | Senior Secured Notes Due 2027 | Minimum [Member]                              
Debt Instrument [Line Items]                              
Debt instrument, interest rate, stated percentage   7.13% 7.13%                        
Senior Notes | Senior Secured Notes Due 2027 | Maximum [Member]                              
Debt Instrument [Line Items]                              
Debt instrument, interest rate, stated percentage   7.25% 7.25%