X0508 4 2024-04-12 false 0001670076 Frontier Group Holdings, Inc. ULCC 0001511298 Biffle Barry C/O FRONTIER GROUP HOLDINGS INC. 4545 AIRPORT WAY DENVER CO 80239 true true false false CEO false Common Stock 2024-04-12 4 M false 20000.00 0.2632 A 812981.00 D Common Stock 48949.00 I By Family Trust Common Stock 158975.00 I By Spouse Stock Options (Right to buy) 0.2632 2024-04-12 4 M false 20000.00 0.00 D 2024-04-27 Common Stock 20000.00 0.00 D These shares of Issuer Common Stock are held in a trust for the benefit of the Reporting Person's child. The Reporting Person's spouse is the trustee of the trust. The Reporting Person disclaims beneficial ownership of these shares of Issuer Common Stock, and the filing of this report is not an admission that the Reporting Person is the beneficial owner of these shares of Issuer Common Stock for purposes of Section 16 or for any other purpose. Represents shares received by the Reporting Person's spouse, as part of a pro-rata distribution in-kind by Indigo Frontier Holdings Company, LLC to its members for no consideration. The stock options are fully vested and exercisable. /s/ Howard Diamond, as Attorney-in-fact for Barry L. Biffle 2024-04-16