Frontier Airlines allows travellers to cancel their Cancel frontier flight  for a full refund within 24 hours after booking. This guideline applies to all pricing classes, including basic economy fares on the airline. The airline's cancellation policy is governed on the kind of fare paid after the 24-hour window has expired.Frontier Airlines, located in Denver, Colorado, is a low-cost carrier that serves over 100 locations in the United States, the Caribbean, and Mexico. As with any airline, travellers may need to cancel their trip arrangements due to unforeseen circumstances. We will look at Frontier airlines cancellation policy and what travellers should know before cancelling their trips in this post.