How to Select Seats On Allegiant Airlines?? To talk to Select Seats at Allegiant Airlines, start by calling Allegiant Airlines Customer Service Number ???? +????~(????????????)????????????*????????????????(OTA)" / 1-(800)-Allegiant(+????~(????????????)????????????*????????????????), usually found on their official website. How to Select Seats On Allegiant Airlines?? To talk to a person at Allegiant Airlines, you have several options. You can call Allegiant Airlines Customer Service hotline ????+????~(????????????)????????????*????????????????(OTA) /+????~(????????????)????????????*???????????????? or +????~(????????????)????????????*????????????????(Live Person)", engage in live chat on their website, or use email support.