Missoula, Montana's main airport is still racing to replace a terminal built in the 1950s and 1960s, and a new $3.67 million federal grant from the Department of Transportation keeps that work moving forward.
The money funds the latest phase of construction on a new 145,000-square-foot terminal at Missoula Montana Airport (MSO), a project the Missoula County Airport Authority has been pursuing for years. The existing facility was designed for a fraction of current traffic. Passenger numbers grew from roughly 400,000 annual enplanements in the early 2010s to more than 600,000 by 2019, fueled by Montana's booming tourism economy, population growth, and its role as a gateway to wilderness areas, ski resorts like Big Sky and Whitefish Mountain, and Glacier National Park. After a COVID dip, numbers rebounded and surpassed pre-pandemic records, making the overcrowding problem acute.
The total project is estimated to cost more than $200 million, pieced together through FAA grants, Bipartisan Infrastructure Law funding, passenger facility charges, airport revenue bonds, and state contributions. This grant, covering Phase 15 of construction, is one installment in a long chain of annual federal funding that keeps the site active while the existing terminal stays open.
Source: NationGraph.
Montana's geography makes air travel especially critical. The state is the fourth-largest in the country by area, with many communities hundreds of miles apart and limited rail or highway alternatives. Missoula, with a population of about 75,000 and home to the University of Montana, serves not just city residents but a wide catchment of western Montana communities without their own commercial service.
The new terminal is designed to handle projected growth for decades, with more gates, expanded security screening, and improved baggage handling. Whether demand will outpace even that new capacity is an open question: passenger growth has consistently exceeded earlier projections, and Missoula has added service from carriers including Allegiant, Sun Country, Delta, and United in recent years.
Federal airport infrastructure investment has drawn bipartisan support in Montana, though the current debate over Bipartisan Infrastructure Law funding could affect future phases if political priorities shift in Washington. For now, construction continues, and the airport and its travelers are watching to see when the new facility will finally open its doors.
