X0508 4 2026-02-05 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 2026-02-05 4 A false 3224.00 0.00 A 138421.00 D Common Stock 2026-02-06 4 F false 1410.00 5.65 D 137011.00 D Restricted Stock Units 2026-02-05 4 A false 88496.00 0.00 A Common Stock 88496.00 88496.00 D On February 6, 2025, the reporting person was granted an award of Performance Stock Units ("PSUs"), which vest in the form of Common Stock based upon the Issuer's achievement of certain levels of total shareholder return relative to a pre-determined industry peer group. On February 5th, 2026, the Compensation Committee of the Issuer's Board of Directors determined that the performance goals had been partially met, resulting in the vesting of these shares. Represents shares withheld in satisfaction of taxes due upon the vesting of PSUs reported herein. Each Restricted Stock Unit represents a contingent right to receive one share of Issuer Common Stock. The Restricted Stock Units have no expiration date. The Restricted Stock Units vest in three substantially equal annual installments beginning on February 5, 2027. /s/ Howard M. Diamond 2026-02-09