Yes, Frontier Airlines charges for carry-on bags for almost all ticket types in 2026. Only a small personal item (like a backpack or purse that fits under the seat) is included for free with their basic fare. If you want to use the overhead bin for a standard carry-on suitcase, you must pay a fee that typically ranges from $50 to $100 depending on when you pay. A unique quirk of Frontier is that a checked bag is often cheaper than a carry-on; the airline encourages checking bags to speed up the boarding process. If you wait until you get to the boarding gate to pay for a carry-on, you will be hit with their highest "gate-check" fee. The only exception is for high-tier Frontier Miles elite members or active-duty U.S. military personnel, who may receive a complimentary carry-on allowance as part of their status or service benefits.