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The Pacific Northwest's primary gateway to the world.
Opened
1944
Location
Seattle, United States
Seattle–Tacoma International Airport, commonly known as Sea-Tac, is the primary commercial airport serving the Seattle–Tacoma metropolitan area in Washington State. It is one of the busiest airports in the United States, consistently ranking among the top 10 by passenger volume, handling over 50 million passengers annually in peak pre-pandemic years.
Opened in 1944 and operated by the Port of Seattle, Sea-Tac serves as a major hub for Alaska Airlines and a significant gateway for Delta Air Lines. Its location on the Pacific Rim makes it an important transpacific hub connecting North America to Asia and beyond.
The airport has undergone extensive modernization and expansion projects in recent decades, including the opening of the International Arrivals Facility in 2020, which significantly improved international passenger processing capacity and amenities.
Terminals
Sea-Tac has one main terminal with a central building and four concourses (A, B, C, and D/S), connected by an automated underground people mover system.
Getting to & from
The airport is connected to downtown Seattle and the broader region via the Link Light Rail (1 Line), operated by Sound Transit, with a station directly beneath the terminal, as well as shuttle services, taxis, and rideshares.
Airlines here
Alaska Airlines uses Sea-Tac as its primary hub, while Delta Air Lines operates a significant hub here, with additional service from United, American, Southwest, and numerous international carriers.
Notable facts
- ›Sea-Tac is the largest airport in the Pacific Northwest and one of the top 10 busiest in the United States.
- ›Alaska Airlines was founded in the region and maintains its largest hub and headquarters presence at Sea-Tac.
- ›The International Arrivals Facility, opened in 2020, cost approximately $968 million and doubled international processing capacity.
- ›The airport sits at an elevation of 433 feet above sea level on a plateau between Puget Sound and Lake Washington.
- ›Sea-Tac is managed and operated by the Port of Seattle, a public agency.
This profile is provided for general information only. Details may be inaccurate or outdated — always verify with the airport's official website before acting on them.
