What Terminal is Alaska Airlines at IAH, The address of Alaska Airlines is Terminal A. Alaska Airlines operates domestic flights from this terminal to points around the nation, including its hubs in Seattle and the West Coast. At IAH's Terminal A, visitors can take advantage of a range of amenities, including stores, restaurants, and cozy waiting rooms. Passengers using Alaska Airlines can board the aircraft after going through security and checking in at the appropriate kiosks in Terminal A. A tram system and shuttle services connect the terminal to other parts of the airport.