Seattle-Tacoma International Airport

Seattle-Tacoma International Airport, commonly known as SEA or Sea-Tac, is the busiest airport in the Pacific Northwest and a major hub for Alaska Airlines and Delta Air Lines. SEA handles around 50 million passengers per year and sits about 14 miles south of downtown Seattle. The airport is the primary operating base for Alaska Airlines, which uses it as a gateway to Alaska, the Pacific Northwest, Hawaii, Mexico, and increasingly Central and South America. Delta has built up significant international service from SEA, with direct flights to Europe, Asia, and South America. SEA also handles regular service from international carriers including Emirates, British Airways, Japan Airlines, ANA, Korean Air, and several European flag carriers. The airport has been investing heavily in capacity expansion to handle the growth of West Coast traffic, and the International Arrivals Facility that opened in 2022 has significantly improved the passenger experience for arriving international flights. SEA is notable for its relatively efficient single-terminal layout, which has been maintained even as the airport has grown.