TREX isn’t just one project. It’s a series of coordinated development initiatives taking shape in and around the airport over the next several years to bring our vision of a more modern, efficient terminal facility to life for the Inland Northwest.

Phase 1: Concourse C Expansion (completed June 2026)

The Concourse C Expansion Project, the first component of the TREX Program, was the foundational project that makes all future TREX-related initiatives possible. Construction on the Concourse C Expansion, a 144,000-square-foot addition to the Airport’s existing terminal building that resulted in three new gates, six new ticket counters and a suite of new passenger amenities, began in 2022 and was completed in two major phases: the Concourse C West Expansion and the Concourse C East Expansion.

Phase 2: Central Hall Project (beginning Q2 2026)

The second part of the airport’s TREX Program, designed to build off the enabling work brought to life through the C Concourse Expansion, the component is aimed at creating a 255,000-square foot centralized facility at the heart of the airport. The end goal? Consolidated baggage claim areas, more efficient security screening, easier access to airport concessions, and even more passenger-focused amenities. To enable this development, teams will first need to relocate key utilities – a project component expected to span from Q2 2026 into early 2027.

Future Phases

Subject to future funding, subsequent TREX phases may include the modernization of the airport’s A and B concourses.