Great Falls International Airport (IATA: GTF, ICAO: KGTF, FAA LID: GTF) is a public/military airport in city limits three miles southwest of central Great Falls in Cascade County, Montana, United States. The airport has also been called Great Falls Municipal Airport.

The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service airport. Federal Aviation Administration records say the airport had 143,811 passenger boardings (enplanements) in calendar year 2008, 146,438 in 2009 and 155,204 in 2010.

Great Falls International Airport is home to Great Falls Air National Guard Base, which hosts the Montana Air National Guard's 120th Airlift Wing (120 AW), the "Vigilantes." Operationally-gained by Air Mobility Command (AMC), the 120 AW reequipped with the Lockheed C-130 Hercules in 2014, which it employs in medium airlift missions. In its previous incarnation as the 120th Fighter Wing, it previously flew the McDonnell Douglas F-15 Eagle.

Malmstrom Air Force Base, home of the 341st Missile Wing (341 MW) of the Air Force Global Strike Command (AFGSC), is 10 miles (16 km) east of GTF, on the east side of Great Falls.