How to Cancel an Allegiant Airlines Flight? To cancel an Allegiant Airlines flight, log into your account on their website, go to "Manage Travel," choose the flight to cancel, review the policy for fees and refunds, confirm the cancellation, and follow the prompts.Keep records of confirmation for reference. For more information about Canceling Allegiant Flight call at the helpline number 1-702-505-8888 or 1-844-902-4930 (OTA-Skip Waiting). Or read the blog on the Airlinespetpolicy's site. 🌎Website: https://www.airlinespetpolicy.com/blog/allegiant-airlines-flight-cancellation-policy/ #cancelingallegiantflight #howtocancelallegiantflight #cancelallegiantflightonline #costtocancelallegiantflight