https://www.lowfaresfinder.com/blogs/does-frontier-have-a-24-hour-cancellation-policy Explained: How Frontier Airlines Handles 24-Hour Cancellations Frontier 24-hour Cancellation: Frontier Airlines offers a 24-hour grace period for cancellations made within 24 hours of booking, as long as the reservation was made at least 7 days before departure. Refunds are credited to the original form of payment, excluding any applicable fees.