https://www.lowfaresfinder.com/blogs/does-frontier-have-a-24-hour-cancellation-policy Unlocking Peace of Mind: Frontier's 24-Hour Cancellation Policy Demystified Frontier Airlines provides a convenient 24-hour cancellation window, permitting passengers to cancel reservations made directly with the airline within the first 24 hours without facing any cancellation fees. This policy caters to changing travel needs and unforeseen circumstances, offering flexibility to passengers.