How do I talk to a person at Allegiant Air Customer Service? Allegiant Air Customer Service stage offers a large number of choices for the travelers to determine their questions at the earliest opportunity. Allegiant Air is know for serving its travelers effectively with top tier administrations. In this manner, the carrier has prepared proficient consideration officials to get the traveler's question settled shortly as it were. In the event that you wish to have a telephonic discussion, approach +1 866 719-3910 or our representatives: +1-888-894-2072.