Several people in Las Vegas enquire about what terminal is spirit at las vegas airport. In 2021, more than 20 million passengers will pass through the busiest terminal in the US, according to Spirit terminal LAS Vegas Airports, with half of those being passengers of Spirit Airlines. It serves as the primary hub for Spirit Airlines and other key domestic and international carriers. The two terminals at the Spirit Airlines Mccarran airport are Terminal 1 and Terminal 3.