X0407 4 2023-04-12 false 0001670076 Frontier Group Holdings, Inc. ULCC 0001853479 Filene Jacob F. C/O FRONTIER GROUP HOLDINGS, INC. 4545 AIRPORT WAY DENVER CO 80239 false true false false Sr. Vice President, Customers true Common Stock 2023-04-12 4 S false 34842.00 9.4898 D 27778.00 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 22, 2023. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.30 to $9.85, inclusive. 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 within the price range set forth in this footnote. /s/ Howard Diamond, as Attorney-in-fact for Jake F. Filene 2023-04-13