X0508 4 2025-09-05 false 0001670076 Frontier Group Holdings, Inc. ULCC 0001671358 Diamond Howard C/O FRONTIER GROUP HOLDINGS, INC. 4545 AIRPORT WAY DENVER CO 80239 false true false false EVP, Legal & Corporate Affairs false Common Stock 2025-09-05 4 S false 35401.00 5.50 D 74195.00 D /s/ Howard M. Diamond 2025-09-09