Seattle–Tacoma International Airport (IATA: SEA, ICAO: KSEA, FAA LID: SEA), also referred to as Sea–Tac, is the primary commercial airport serving the Seattle metropolitan area in the U.S. state of Washington. It is in the city of SeaTac, approximately 14 miles (23 km) south of Downtown Seattle and 18 miles (29 km) north-northeast of Downtown Tacoma.
About its facilities, Seattle–Tacoma has 103 gates on four concourses and two satellite buildings. The entire airport covers an area of 2,500 acres or 3.9 square miles (10 km2), much smaller than other U.S. airports with similar annual passenger numbers.
In 2020, the airport handled 20,061,507 passengers and 454,584 metric tons of cargo and had 296,048 aircraft movements.