Allegiant Air: Ensuring Exceptional Customer Service At Allegiant Air, we prioritize providing excellent customer service to ensure a seamless travel experience for all our passengers +1^855^200^06::39 . We understand that travelers may have questions and concerns regarding various aspects of their journey, from booking to cancellations and refunds. Here's a comprehensive guide to addressing some common queries: 1. Can I get a full refund from Allegiant Air? Yes, Allegiant Air offers a full refund within 24 hours of booking, provided the reservation was made at least one week (168 hours) before the scheduled departure.