144 0001511298 XXXXXXXX LIVE 0001670076 Frontier Group Holdings, Inc. 001-40304 4545 Airport Way Denver CO 80239 7203744200 Barry Biffle Officer common UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

631806 3550000 228155458 09/02/2025 NASDAQ common 10/30/2023 ESOP Frontier Group Holdings Inc N 23965 10/30/2023 N/A common 02/03/2024 RSU Frontier Group Holdings Inc N 42264 02/03/2024 N/A common 02/08/2024 RSU Frontier Group Holdings Inc N 5567 02/08/2024 N/A common 02/08/2024 RSU Frontier Group Holdings Inc N 31658 02/08/2024 N/A common 02/23/2024 RSU Frontier Group Holdings Inc N 29527 02/23/2024 N/A common 04/01/2024 ESOP Frontier Group Holdings Inc N 20000 04/01/2024 N/A common 04/12/2024 ESOP Frontier Group Holdings Inc N 20000 04/12/2024 N/A common 10/25/2024 RSU Frontier Group Holdings Inc N 131836 10/25/2024 N/A common 01/15/2025 ESOP Frontier Group Holdings Inc N 119065 01/15/2025 N/A common 03/07/2024 share distribution Indigo Frontier Holdings Co LLC N 158975 03/07/2024 N/A common 02/24/2023 Gift Barry Biffle Y 02/24/2023 48949 02/24/2023 N/A Y Barry Biffle is CEO of Frontier Group Holdings Inc. This filing includes 423,882 shares which Barry is the seller, 158,975 shares which Brandi Biffle is the seller, and 48,949 shares which The Banks Barnhart Biffle Irrevocable Trust is the seller. 09/02/2025 /s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for Barry Biffle