Great Falls International Airport is a primary, non-hub, commercial service airport for the City of Great Falls and the north-central Montana region. RS&H, through a collaborative process with Airport staff, the Airport Authority, TSA, and FAA, proposed an area increase of approximately 20,000 square feet to the 138,000-square-foot existing terminal. The expansion allows for the reconfigured security checkpoint to accommodate passenger enplanements from the current 159,000 to up to 310,000; the introduction of air-side concessions to entice passengers to pass through security earlier, offering them amenities previously unavailable; inclusion of properly sized secure-side restroom facilities; and the addition of another departure lounge. The architectural expression of the proposed expansion is at once different from and complementary to the existing while accommodating existing and proposed passenger boarding bridges. The interior spaces improve the overall passenger experience with a higher quality of light due to a significant increase in glazing, substantial views, various seating and waiting options, and plentiful opportunities for local art and history displays.