Is It Possible to Cancel Allegiant Flights Within 24 Hours?

Need to cancel your Allegiant flight? Allegiant Air offers a 24-hour cancellation policy allowing you to cancel your reservation without a fee if done within 24 hours of booking and at least seven days before your scheduled departure. To cancel, log in to your Allegiant account, access your booking, and complete the cancellation process. For any questions or help, head to Allegiant’s website or get in touch with their customer service.

Source: https://community.nicic.gov/node/43481