Seattle-Tacoma International Airport (SEA) is set to open its redesigned C Concourse Expansion on June 11, introducing four new floors of enhanced traveler amenities, dining, and retail options.
Located between the C and D Concourses, the expansion transforms former nonpublic space into an open atrium featuring ten new dining and retail choices, six SEA Sparks Incubator Program kiosks, and unique architectural elements like the Tree at C and Grand Stairs. Travelers will also find an Interfaith Prayer and Meditation Room, a Sensory Room, a Nursing Room, a performance area, and an airfield observation area called The Lookout at C.
Port of Seattle Commission President Ryan Calkins said, "The C Concourse Expansion represents more than a new building for the Port of Seattle — it demonstrates what is possible when innovation, environmental leadership, and partnership come together." He added that the Port is "proud to deliver a transformative space that elevates comfort and connection while advancing its climate goals."
Operated by the Port of Seattle, SEA served over 52.7 million passengers in 2025 and has been recognized as the Best Airport in North America for three consecutive years.