What Terminal is Southwest Airlines at LAS? Southwest Airlines primarily operates from Terminal 1 at Harry Reid International Airport (LAS), formerly known as McCarran International Airport. Passengers flying with Southwest can access their check-in counters, baggage claim, and departure gates conveniently in this terminal. Terminal 1 features amenities such as dining options, retail stores, and comfortable waiting areas, ensuring a pleasant travel experience. The terminal is connected to the airport's parking facilities and transportation services, making it easy for travelers to navigate. Always check your boarding pass or airline notifications for any updates regarding gate assignments.