X0609 4 2026-05-14 false 0001670076 Frontier Group Holdings, Inc. ULCC 0001871709 Kumpf Ofelia false C/O FRONTIER GROUP HOLDINGS, INC. 4545 AIRPORT WAY DENVER CO 80239 true false false false false Common Stock 2026-05-14 4 M false 34230.00 A 98409.00 D Restricted Stock Units 2026-05-14 4 M false 34230.00 0.00 D Common Stock 34230.00 0.00 D Deferred Stock Units 2026-05-14 4 A false 32990.00 0.00 A Common Stock 32990.00 32990.00 D Each Restricted Stock Unit represents a contingent right to receive one share of Issuer Common Stock. The Restricted Stock Units have no expiration date. The RSUs have fully vested as of May 14, 2026. Each Deferred Stock Unit represents a contingent right to receive one share of Issuer Common Stock. The Deferred Stock Units have no expiration date. The Deferred Stock Units will vest in full on the earlier of May 14, 2027 or immediately prior to the next annual meeting of stockholders after the grant date and will be settled in shares of the Issuer's Common Stock either (i) on a date selected by the Reporting Person pursuant to the Issuer's Non-Employee Director Compensation Program (the "Plan"), or (ii) as otherwise provided by the Plan. /s/ Howard Diamond, as Attorney-in-fact for Ofelia Kumpf 2026-05-18