What Terminal is Delta Airlines At LAS? Delta Airlines operates out of Terminal 1 at Harry Reid International Airport (formerly McCarran International Airport) in Las Vegas. Terminal 1 is well-equipped with a variety of amenities, including dining options, retail shops, and comfortable waiting areas, ensuring a pleasant travel experience for passengers. Delta primarily uses gates in Concourse A, providing easy access to check-in and security services, making it convenient for travelers flying with Delta Airlines from LAS.