VISIT US : https://www.terminalfind.com/southwest-airlines/southwest-airlines-sea-terminal-seattle-tacoma-international-airport/ Southwest Airlines operates from Terminal A at Seattle-Tacoma International Airport (SEA), commonly known as Sea-Tac. SEA is a major hub in the Pacific Northwest and one of the busiest airports in the United States, connecting Seattle to destinations across the U.S. and beyond. Southwest Airlines SEA Terminal known for its extensive network and no-frills approach, provides a seamless experience for passengers flying through SEA, emphasizing efficiency and convenience.