Frontier Group Holdings, Inc.

Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements

During the fiscal quarter ended June 30, 2026, none of our directors or officers adopted, modified orterminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any other “non-Rule 10b5-1 trading arrangement” except as follows:

On May 7, 2026, Trevor Stedke, our Senior Vice President of Operations, terminated a Rule 10b5-1(c) trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c), which was originally adopted on September 2, 2025 for the sale of 191,436 shares of our common stock, plus an indeterminable number of shares to be acquired upon the future vesting of restricted and performance stock units, and was scheduled to expire on August 15, 2026. On May 12, 2026, Mr. Stedke adopted a Rule 10b5-1(c) trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 167,277 shares of our common stock, plus an indeterminable number of shares to be acquired upon the future vesting of restricted and performance stock units, until May 10, 2028.

On June 3, 2026, Steve Schuller, our Senior Vice President of Human Resources, adopted a Rule 10b5-1(c) trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 60,000 shares of our common stock until April 30, 2028.