Allegiant Air offers-hour refund policy”, which allows you to receive a full refund if you cancel within hours of booking Allegiant Air Customers can cancel within hours of booking for a full refund or The cheapest days to fly on ???????????????????????????????????? Airlines are generally Tuesdays, Wednesdays, and Saturdays These days typically have lower demand, which results in reduced Airfare prices compared to peak travel days like Fridays and Sundays What is the cheapest day to book Allegiant flights? The cheapest days to book Allegiant Air tickets are typically Tuesdays, Wednesdays, and at (UK) due to lower demand. Booking in Advance and traveling mid-week can help you find the best deal at Allegiant Air's cancellation rate is usually low, around but it's wise to be prepared for potential disruptions. Although the cancellation rate is low at Allegiant Air flights are not guaranteed to be cancellation-free.