Wondering about Allegiant's cancellation policy? Allegiant offers travelers the ability to cancel their flights, but specific terms apply. If you cancel within 24 hours of booking, you're eligible for a full refund, provided the flight is at least seven days away. After that window, a cancellation fee is deducted, and the remaining balance is issued as credit for future travel. Need to cancel your Allegiant flight? Act quickly to avoid higher fees and get the best refund. Explore Allegiant’s full cancellation policy on their official website for detailed information.