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