Big changes are underway at Seattle-Tacoma International Airport (SEA).

Through Upgrade SEA, a multi-year capital improvement campaign, the airport is evolving to meet the needs of today's travelers — just in time for the 2026 FIFA World Cup, where Seattle will serve as one of several host cities.

The goal? To ensure SEA is “upgrading to welcome the world.” With several major projects already underway, here's what travelers can look forward to.

The C Concourse Expansion is lifting SEA to new heights (literally) with added space, thoughtful amenities, and green design features. | Photo provided by Port of Seattle

C Concourse Expansion (CCE)

As part of an additional facility at C Concourse, this expansion brings more than 200,000 sqft of new space to the terminal. Inside, passengers will find:

13 new dining and retail spaces
A central marketplace called Marketplace at C
An architectural showpiece known as Tree at C
Lookout at C, a platform with expansive airfield views
Amenities including a sensory room, an interfaith prayer and meditation room, and a live performance area

Sustainability is also a major focus, with innovative features setting the precedent for future capital projects at the Port. Think: Fossil fuel-free systems, low-flow water fixtures, and electrochromic window glazing.

As the region grows, SEA Airport is reimagining the traveler experience with a modernized, light-filled terminal entrance with the SEA Gateway Project. | Photo provided by Port of Seattle

SEA Gateway Project

Curb appeal, anyone?

In partnership with Alaska Airlines, this project is transforming the airport's "front door." Highlights include:

A brighter, more efficient Alaska check-in area
An upgraded Checkpoint 6 with increased capacity and a post-security recompose zone
A refreshed baggage claim level featuring new lighting and curated artwork

Roadway Improvements Project

Outside the terminal, this project is focused on streamlining airport access with two additional lanes and dedicated routes for the parking garage and courtesy vehicles.

Read: Smoother traffic flow and less stress for drivers. Yes, please.

Hard hats on: SEA’s transformation is well underway. | Photo provided by Port of Seattle

Looking ahead

While construction is still in progress, many of these major projects are aiming to wrap up before summer 2026.

Want to stay in the loop? Bookmark the website below or subscribe to the FlySEA newsletter for updates.
https://6am-city.typeform.com/to/QmPXZhSZ