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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
NET CASH PROVIDED BY OPERATING ACTIVITIES $ 186.1 $ 207.0
INVESTING ACTIVITIES:    
Purchase of property and equipment [1] (142.3) (286.9)
Proceeds from insurance, sale of property and other equipment, and tariff refunds 22.9 0.6
Pre-delivery deposits paid [1] (2.0) (11.8)
Purchases of marketable securities and investments (120.6) (137.5)
Proceeds from the sale of marketable securities 125.0 162.5
NET CASH USED IN INVESTING ACTIVITIES (117.0) (273.1)
FINANCING ACTIVITIES:    
Proceeds from issuance of debt 64.4 235.2
Payments on debt and finance lease obligations (129.7) (179.0)
Payments for warrant redemption (5.3) 0.0
Taxes paid related to net share settlement of equity awards (4.2) 0.0
Other, net (1.2) (2.6)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES (76.0) 53.6
NET CHANGES IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (6.9) (12.5)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—Beginning of period 157.7 131.9
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—End of period 150.8 119.4
CASH PAID FOR:    
Interest, net of capitalized amounts 49.3 43.6
Income taxes, net of refunds 5.6 3.4
Amounts included in the measurement of operating lease liabilities 18.6 15.1
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTIONS:    
Property and equipment acquired, but not paid 10.6 6.3
Right-of-use assets acquired or modified under operating leases 0.5 (0.4)
Nonrelated Party    
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTIONS:    
Parts credits received from aircraft and engine manufacturers 2.4 4.1
Related Party    
SUPPLEMENTAL DISCLOSURE OF NON-CASH TRANSACTIONS:    
Parts credits received from aircraft and engine manufacturers $ 0.3 $ 1.1
[1] The Company made net aircraft, pre-delivery deposit payments, inventory, and rotable spare part purchases from its original equipment manufacturer, a related party, of $73.0 million and $217.9 million during the nine months ended September 30, 2026 and 2025, respectively.