Allegiant Air offers you the flexibility to change the air flight. All you need to know is the Allegiant Air Flight change policy and fees linked with it. For direct assistance contact Allegiant Air Customer Service 1-800-364-9405 and Allegiant Air Live Agents assist you for the same. You can contact to the Allegiant Air Helpline 1-800-364-9405 and change or reschedule Allegiant flight without extra fee. Go through the Allegiant Air Flight Change Policy for more details.