Yes, you can cancel an Allegiant flight without incurring a penalty if you do so within 24 hours of booking, provided that the departure date is at least one week away ₳1▶833✤✥460✤✥1838????. After this period, cancellation fees may apply. For specific details regarding your flight and to initiate a cancellation, you can contact Allegiant directly If you need to cancel your Allegiant flight, you may do so without a penalty by canceling within 24 hours of booking, as long as the flight's departure is more than 7 days in the future.