SEATAC KSEA Airfield Map Art. Seattle–Tacoma International Airport (KSEA or LID: SEA) is the largest airport in the Pacific Northwest region of the United States. The airport is located in the eponymous city of SeaTac, Washington, approximately twelve miles south of downtown Seattle and is the primary airport for the Seattle metropolitan area. The airport has flights to cities throughout North America, Europe, the Middle East and Asia. In 2014 the airport served over 37 million passengers.
