Yes, you can cancel your Allegiant flight without incurring any penalties if you do so within 24 hours of booking 1-844-949-8748 {Free-Cancel}. This policy allows for a full refund if the cancellation is made within this time frame 1-844-949-8748 {Free-Cancel}, provided that the scheduled departure of your flight is at least one week (168 hours) away. Should you need to cancel your flight, you can contact Allegiant directly at 1-844-949-8748 for assistance.