Need to change your travel plans close to departure? Explore theAllegiant cancellation policy to understand important deadlines, no-show conditions, cancellation restrictions, and available alternatives. Allegiant generally applies different rules depending on whether your reservation includes Trip Flex and how much time remains before departure. Learn why contacting the airline or checking your online booking early can help you understand your options. This guide covers important considerations for passengers who need to cancel a flight, change travel dates, or manage an unexpected schedule change. Review the conditions for your specific reservation before taking action.