Allegiant Airlines Flight Change Policy Making last-minute changes to the itinerary can be annoying! However, some serious events could occur that would have a significant, overall impact on the expedition. Are you an Allegiant Air passenger? Do you intend to modify your Allegiant Airlines reservation for any reason? This tutorial could be useful to you. You will learn more about the comprehensive Allegiant Airlines ticket exchange policy from it. You snatch various options, rules, and requirements to take into account while submitting the flight change request.