Spirit Airlines LAS Terminal +1-888-839-0502 Spirit Airlines LAS Terminal is based at Terminal 1. The website's 'My Trips' feature, the check-in process, or the booking process allow passengers to choose their seats. The cost of choosing a seat varies according to the flight path and seat location. At check-in, seats are assigned at random without choosing.​ For More : https://www.terminalfind.com/spirit-airlines/spirit-airlines-las-terminal-harry-reid-international-airport/