It is the major American Airline in the United States. Its headquarters is in the SeaTac, Washington. It is the fifth-largest airline in the United States and is measured by the fleet, scheduled passengers carried, and the number of the destinations served. Alaska Airlines together with its regional partners with Horizon Air and SkyWest Airlines. It operates in the domestic routes and is primarily focused on connecting the Pacific Northwest, West Coast, and Alaska over the hundred destinations in the contiguous United States, Canada, Hawaii, Costa Rica, and Mexico.