Spirit Airlines is one of the most well-known low-cost airlines operating in the US. It offers flights to several cities around the country, including Las Vegas, one of the most popular tourist destinations in the whole globe.Harry Reid International Airport in Las Vegas is used by what terminal is spirit in las vegas. It serves as a hub for airlines from all over the world and is the principal international airport of the area. It was once called Mccarran International Airport. To avoid confusion and make it safely to the port, you must not mix up these two.