What Terminal is Spirit Airlines at Las Vegas? Spirit Airlines operates primarily out of Terminal 1 at McCarran International Airport in Las Vegas. Passengers flying with Spirit Airlines can find their check-in counters, ticketing, and departure gates conveniently located within this terminal. McCarran International Airport is one of the busiest airports in the United States, and Terminal 1 offers a range of amenities and services to ensure a comfortable travel experience for Spirit Airlines passengers departing from Las Vegas. From dining options to retail stores, travelers can find everything they need before their flight within Terminal 1.