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These shares were sold in multiple transactions at prices ranging from $5.72 to $5.87, 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."}],"balance_after":631836,"source":{"system":"sec-edgar","filing":"0001511298-25-000008","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1670076/000151129825000008/primarydocument.xml","form_type":"4"}},{"id":971181,"issuer":{"id":4796,"kind":"organization","name":"Frontier Group Holdings, Inc.","symbol":"ULCC"},"owners":[{"id":71648,"kind":"person","name":"Biffle Barry","position":1,"cik":"0001511298","reported_name":"Biffle Barry","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-12-12T21:55:32.000Z","date":"2025-12-10","kind":"sale","planned":true,"acquired":false,"shares":17373,"price":6.0106,"value":104422.1538,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.01 to $6.02, 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."}],"balance_after":714463,"source":{"system":"sec-edgar","filing":"0001511298-25-000008","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1670076/000151129825000008/primarydocument.xml","form_type":"4"}},{"id":977607,"issuer":{"id":4796,"kind":"organization","name":"Frontier Group Holdings, Inc.","symbol":"ULCC"},"owners":[{"id":71648,"kind":"person","name":"Biffle Barry","position":1,"cik":"0001511298","reported_name":"Biffle Barry","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-12-08T21:57:50.000Z","date":"2025-12-08","kind":"sale","planned":true,"acquired":false,"shares":100000,"price":5.5429,"value":554290.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.53 to $5.58, inclusive. The Reporting Person undertakes to provide\nto 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\nshares sold at each separate price within the price range set forth in this footnote."}],"balance_after":731836,"source":{"system":"sec-edgar","filing":"0001511298-25-000007","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1670076/000151129825000007/primarydocument.xml","form_type":"4"}},{"id":977606,"issuer":{"id":4796,"kind":"organization","name":"Frontier Group Holdings, Inc.","symbol":"ULCC"},"owners":[{"id":71648,"kind":"person","name":"Biffle Barry","position":1,"cik":"0001511298","reported_name":"Biffle Barry","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-12-08T21:57:50.000Z","date":"2025-12-05","kind":"sale","planned":true,"acquired":false,"shares":44813,"price":5.0482,"value":226224.9866,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.03 to $5.09, inclusive. The Reporting Person undertakes to provide\nto 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\nshares sold at each separate price within the price range set forth in this footnote."}],"balance_after":831836,"source":{"system":"sec-edgar","filing":"0001511298-25-000007","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1670076/000151129825000007/primarydocument.xml","form_type":"4"}},{"id":977605,"issuer":{"id":4796,"kind":"organization","name":"Frontier Group Holdings, Inc.","symbol":"ULCC"},"owners":[{"id":71648,"kind":"person","name":"Biffle Barry","position":1,"cik":"0001511298","reported_name":"Biffle Barry","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Common Stock","published_at":"2025-12-08T21:57:50.000Z","date":"2025-12-04","kind":"sale","planned":true,"acquired":false,"shares":55187,"price":5.0356,"value":277899.6572,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 8, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.03 to $5.06, inclusive. The Reporting Person undertakes to provide\nto 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\nshares sold at each separate price within the price range set forth in this footnote."}],"balance_after":876649,"source":{"system":"sec-edgar","filing":"0001511298-25-000007","document":"primarydocument.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1670076/000151129825000007/primarydocument.xml","form_type":"4"}},{"id":1012586,"issuer":{"id":4796,"kind":"organization","name":"Frontier Group Holdings, Inc.","symbol":"ULCC"},"owners":[{"id":71648,"kind":"person","name":"Biffle Barry","position":1,"cik":"0001511298","reported_name":"Biffle Barry","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CEO"}}],"security":"Restricted Stock Units","published_at":"2025-10-28T20:05:58.000Z","date":"2025-10-25","kind":"exercise","planned":false,"acquired":false,"shares":234375,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Restricted Stock Unit represents a contingent right to receive one share of Issuer Common Stock. 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