Alaska Airlines, the fifth-largest domestic airline in the United States, according to Department of Transportation (DOT) data, has a network that is primarily based on the country's west coast. The carrier, with a 6.4% domestic market share between December 2022 and November 2023, has three primary hubs in terms of scheduled one-way flights: Seattle Tacoma International Airport (SEA), Portland International Airport (PDX), and San Francisco International Airport (SFO).