X0609 4 2026-05-21 false 0001670076 Frontier Group Holdings, Inc. ULCC 0001911236 Wetzel Josh A false C/O FRONTIER GROUP HOLDINGS, INC. 4545 AIRPORT WAY DENVER CO 80239 false true false false VP & CAO false Common Stock 2026-05-21 4 S false 13500.00 4.7506 D 12061.00 D The price reported in Column 4 is a weighted average price. The Reporting Person undertakes to provide to Frontier Group Holdings, Inc., any security holder of Frontier Group Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. /s/ Howard Diamond, as Attorney-in-fact for Josh A. Wetzel 2026-05-21