FAA funds Sea-Tac concourse rebuild

Overview

Updated Oct 15

The Federal Aviation Administration recorded a $30.2 million grant to the Port of Seattle on September 3, 2026, funding Phase 4 of the Concourse S reconstruction at Seattle-Tacoma International Airport. The work covers 30,000 of 86,000 square feet of aging terminal space. The airport moves about 53 million travelers a year.

The grant is one piece of a larger overhaul. In August, the Port Commission approved $1.1 billion in initial funding for the S Concourse Evolution, a $2.5 billion project scheduled from 2027 to 2034. That program is now soliciting construction bids, with initial packages due in mid-October. The grant also lands amid a legal fight: on September 14, the Port joined six other Washington governments in a lawsuit to block conditions on federal money tied to executive orders on immigration, LGBTQ, and abortion policy.

Why it matters

Federal money for Sea-Tac's aging terminal is tangled in a lawsuit over conditions, while a $2.5 billion concourse overhaul moves ahead.

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Key Indicators

$30.2M

Federal FAA grant awarded

Obligated September 3, 2026 for Phase 4 of Concourse S.

86,000 sq ft

Total concourse reconstruction scope

Phase 4 covers 30,000 square feet of the 86,000-square-foot project.

53M

Annual travelers at SEA Airport

Passengers served each year at Seattle-Tacoma International Airport.

$2.5B

S Concourse Evolution total cost

Port Commission approved $1.1B initial funding in August; project runs 2027–2034.

Voices

Curated perspectives — historical figures and your fellow readers.

People Involved

Ryan Calkins

Port of Seattle Commission President

Public voice of the Port's response to federal funding conditions

Leesa Manion

King County Prosecuting Attorney

Led earlier successful challenge to federal funding conditions

Girmay Zahilay

King County Executive

Plaintiff in the 2026 funding-conditions lawsuit

Organizations Involved

Port of Seattle

Public port authority

Grant recipient and plaintiff in funding-conditions lawsuit

Public port authority operating Seattle-Tacoma International Airport, cruise and cargo terminals, and supporting about 204,000 regional jobs.

Federal Aviation Administration (FAA)

Federal Agency

Granting agency for the $30.2 million award

U.S. agency within the Department of Transportation that regulates civil aviation and administers federal airport grants.

Seattle-Tacoma International Airport (SEA)

Airport Facility

Site of the Concourse S reconstruction

The airport serving Seattle and the Pacific Northwest, moving about 53 million passengers a year.

Timeline

August 2026 September 2026

4 events Latest: September 18th, 2026 · 2 months ago

Tap a bar to jump to that date

September 2026
S Concourse Evolution bid package 3 revised
Latest Procurement

Hensel Phelps, the general contractor for the S Concourse Evolution, revised Bid Package 3 covering glass and aluminum systems and vertical transportation. Bids are due October 14, 2026.
September 18th, 2026
Port joins lawsuit over federal funding conditions
Legal

Seven Washington governments, including the Port of Seattle, sued federal agencies to block conditions on congressionally appropriated funds tied to executive orders on immigration, LGBTQ, and abortion policy.
September 14th, 2026
FAA records $30.2 million award for Sea-Tac Concourse S
Grant

The Federal Aviation Administration obligated $30.2 million to the Port of Seattle for Phase 4, constructing 30,000 square feet of the 86,000-square-foot Concourse S rebuild.
September 3rd, 2026
August 2026
Port Commission approves initial funding for S Concourse Evolution
Funding

The Port of Seattle Commission authorized $1.1 billion for the S Concourse Evolution, a $2.5 billion project to renovate the 1973 South Concourse. Major construction is scheduled to start in 2027 with completion by 2034.
August 11th, 2026

Scenarios

Sea-Tac Concourse S Phase 4 opens on schedule

Likely Resolves by End of 2029

Discussed by: Port of Seattle capital program; FAA grant obligations

Construction proceeds under the obligated funds and the 30,000-square-foot segment opens without major delays. Prior phases have been delivered and this phase is now funded, so the main risks are construction scheduling and supply chain disruptions.

Funding conditions dispute stalls or conditions the $30.2 million

Possible Resolves by Q2 2027

Discussed by: Port of Seattle v. Blanche filings; plaintiffs' legal team

If the court denies an injunction or the dispute drags on, the grant could be held up, reduced, or made conditional on the challenged executive order requirements. The Port has said it will pursue preliminary injunctive relief, and the outcome of that motion will determine whether funds flow without strings.

FAA awards additional funds for remaining Concourse S phases

Possible Resolves by End of 2028

Discussed by: Project scale: 86,000 sq ft total versus 30,000 sq ft funded

The total reconstruction is 86,000 square feet and Phase 4 covers 30,000. If the airport continues the program, additional federal awards would fund the remaining area. This scenario tracks whether the federal government backs the rest of the project.

S Concourse Evolution completes on schedule by 2034

Likely Resolves by End of 2034

Discussed by: Port of Seattle capital program

The multiphase project proceeds as planned with major construction starting in 2027. Bids for early packages are already being solicited, so the main risks are supply chain delays and funding shortfalls as later phases come up for authorization.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

2022

Port of Seattle Terminal 5 expansion (2022)

The U.S. Department of Transportation's Maritime Administration awarded the Northwest Seaport Alliance (Port of Seattle) a $17 million grant under the Port Infrastructure Development Program for the Terminal 5 expansion, part of a $71.4 million package for five Washington ports. The project added cargo storage, truck lanes, and scales to reduce congestion and emissions.

Then

Expanded cargo capacity and improved freight flow at the port.

Now

Demonstrated the Port of Seattle's recurring reliance on federal infrastructure grants to modernize facilities.

Why this matters now

Same recipient, same pattern: the Port draws on federal money to rebuild aging infrastructure, now including an airport concourse rather than a marine terminal.

2026

King County v. Scott Turner (2026)

King County sued to block the U.S. Department of Housing and Urban Development and the Department of Transportation from attaching policy conditions to federal grants. A federal court enjoined the conditions and, in August 2026, the Ninth Circuit substantially upheld the injunction.

Then

Hundreds of millions of dollars in King County funding was protected from the challenged conditions.

Now

Established precedent that courts will scrutinize executive-branch attempts to impose policy conditions on congressionally appropriated funds.

Why this matters now

This ruling is the legal foundation the Port's coalition invokes in the follow-on lawsuit filed September 14, 2026.