This article is based on an official press release from the Port of Seattle.

SEA Airports and Alaska Airlines Finalize $546 Million Gateway Project

On Wednesday, January 28, 2026, the Port of Seattle and Alaska Airlines officially marked the completion of the SEA Gateway Project, a massive modernization effort at Seattle-Tacoma International Airport (SEA). The $546 million renovation has transformed the North Main Terminal, delivering a revamped “front door” for the airport just months before the city hosts matches for the FIFA World Cup in the summer of 2026.

According to the Port of Seattle, the five-year partnership with Alaska Airlines focused on upgrading 40-year-old infrastructure to meet the demands of modern travel. The project, designed by HOK and built by Hensel Phelps, added approximately 24,000 square feet of new space while reconfiguring existing areas to improve passenger flow, accessibility, and technology integration.

Modernizing the Passenger Experience

The primary objective of the SEA Gateway Project was to relieve congestion in one of the airport’s busiest sectors. The renovation has introduced an open architecture design, removing low ceilings and obstructive walls to create a light-filled environment intended to evoke the Pacific Northwest landscape.

Streamlined Check-In and Security

A centerpiece of the upgrade is the reconfiguration of the ticketing and check-in areas. Alaska Airlines has implemented a new “Bridge Level” check-in area, allowing passengers to print tags and drop bags before entering the main terminal congestion zone. This area features the airline’s latest self-service technology, including iPad-based tagging stations and automated bag drop belts.

Security throughput has also been addressed with the redesign of Checkpoint 5. The expansion aims to reduce bottlenecks and increase the speed at which passengers move from the curb to the gate. Supporting these surface-level changes is a completely optimized baggage handling system designed to support the new automated drop stations.

“From initial planning to final construction, this project has been years in the making… We now have an amazing space with innovative technology in our lobby that provides for a more seamless travel experience.”

, Shane Jones, Senior VP of Fleet, Revenue Products & Real Estate at Alaska Airlines

Art and Design: The Pacific Northwest Portal

Moving away from the enclosed feel of the 1970s-era terminal, the new design emphasizes natural light, wood accents, and natural stone. The project includes significant artistic contributions designed to welcome international and domestic travelers alike.

Notable installations include “Cosmic” by Jennifer Steinkamp, a massive digital art piece featuring a “digital orchard” of Cosmic Crisp apples, paying homage to Washington State’s agriculture. Additionally, a large-scale glass mosaic by artist Sarah More serves as a focal point for the new ticketing level.

“Everyone has worked tirelessly to bring this multi-level project to life as a portal to the Pacific Northwest. This level of customer service and ease is what people have come to expect of a top-tier international airport, and together, we’ve delivered.”

, Ryan Calkins, Port of Seattle Commission President

Strategic Context and Funding

The completion of the SEA Gateway Project is a key milestone in the broader “Upgrade SEA” capital campaign. With passenger volumes consistently surpassing 52 million annually, the airport has been under pressure to expand capacity. The timing of the completion was strategically aligned with the upcoming 2026 FIFA World Cup, ensuring the facility is ready for the expected influx of global visitors.

Regarding the financial structure of the project, the Port of Seattle confirmed that the $546 million budget utilized no taxpayer dollars. Funding was secured through a combination of Airport Development Funds and future revenue bonds, with the Port reimbursing Alaska Airlines for construction management costs.

AirPro News Analysis

The completion of the SEA Gateway Project reflects a wider industry trend where airports are shifting from purely functional transit hubs to “destination” terminals that emphasize regional identity and high-tech efficiency. By partnering directly with its primary tenant, Alaska Airlines, the Port of Seattle has executed a model of tenant-landlord collaboration that allows for specialized infrastructure tailored to specific carrier technologies, in this case, Alaska’s automated bag drop systems. As SEA prepares for the global stage during the World Cup, this modernization will likely serve as a critical test of the airport’s ability to handle surge capacity while maintaining a high level of passenger experience.

Sources

• Port of Seattle Press Release