X0508 4 2026-02-06 false 0001670076 Frontier Group Holdings, Inc. ULCC 0001677476 Schroeter Robert 4545 AIRPORT WAY DENVER CO 80239 false true false false SVP, Chief Commercial Officer false Common Stock 2026-02-06 4 M false 14421.00 A 53997.00 D Common Stock 2026-02-06 4 F false 4975.00 5.65 D 49022.00 D Restricted Stock Units 2026-02-06 4 M false 14421.00 0.00 D Common Stock 14421.00 28842.00 D Relates solely to the settlement of previously granted Restricted Stock Units upon vesting. No shares were sold by the Reporting Person. Each Restricted Stock Unit represents a contingent right to receive one share of Issuer Common Stock. The Restricted Stock Units have no expiration date. Represents shares of Issuer Common Stock withheld by the Issuer solely to satisfy tax withholding obligations in connection with the net issuance of shares of Issuer Common Stock delivered to the Reporting on February 6, 2026, from the vesting of Restricted Stock Units, and does not represent a sale by the Reporting Person. The remaining Restricted Stock Units vest in two substantially equal annual installments beginning on February 6, 2027. /s/ Howard Diamond, as Attorney-in-fact for Robert Schroeter 2026-02-10