Frontier Airlines generally does not offer refunds for canceled flights, especially if you cancel outside the 24-hour booking window. If you cancel within 24 hours of purchasing your ticket and your flight is at least seven days away, Frontier will issue a full refund. This is in line with the U.S. Department of Transportation’s 24-hour cancellation rule.
After this window, Frontier’s policy is to issue travel credits instead of cash refunds. These credits can be applied to future flights but may be reduced by cancellation fees and are subject to expiration dates. Frontier also provides refunds if your flight is canceled or significantly delayed by the airline for reasons within their control.