Seattle-Tacoma Moves Forward with $2.5B S Concourse Renovation

Project expected to improve the customer experience and increase operational efficiency.

Meg Godlewski

Wednesday, August 12, 2026 at 11:02 AM ET

Verified

Edited By:

Zach Vasile

Seattle-Tacoma International Airport [Credit: Shutterstock]

Key Takeaways:

Seattle-Tacoma International Airport (KSEA) is set to undergo a $2.5 billion renovation of its S Concourse, transforming the 1973-era facility into a modern space.
The project will add 150,000 square feet, including new dining, shopping, and lounge options, an Upper Concourse Level, and improved boarding operations, focusing on "building up" rather than adding new gates.
Work is scheduled to begin in 2027 and is expected to be completed by 2034, with phased construction and a temporary S Annex to minimize disruption to flight operations.

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International travelers passing through Seattle will soon have a different experience passing through the S Concourse at Seattle-Tacoma International Airport (KSEA). According to officials from the Port of Seattle, the concourse will be getting a $2.5 billion renovation, transforming the 1973-era facility into a more modern space. Work is slated to begin in 2027.

“Today’s authorization to move forward with the S Concourse Evolution builds on the generational investments we are making at SEA to improve the passenger experience,” Port of Seattle Commission President Ryan Calkins said in a statement. “The project will add critical seismic, structural, and building systems upgrades to improve long-term passenger circulation as well as operational efficiency.”