Terminal 1 of McCarran International Airport (LAS) in Las Vegas is the operating location for Spirit Airlines LAS Terminal . Domestic flights are handled by Terminal 1, which also has handy baggage claim, security screenings, and check-in booths. Make sure to arrive early if you're traveling with Spirit Airlines so that you have time for security checks. Additionally, there are dining and retail options in the terminal, so unwinding before your trip is simple.