Bozeman Yellowstone International Airport (IATA: BZN, ICAO: KBZN, FAA LID: BZN) (Gallatin Field) is located in Belgrade, Montana, United States, eight miles (13 km; 7 nmi) northwest of Bozeman. Owned by the Gallatin Airport Authority, it has been Montana's busiest airport since 2013.

The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service facility (more than 10,000 enplanements per year). Federal Aviation Administration records show that the airport had 442,788 passenger boardings (enplanements) in calendar year 2013, 434,038 in 2012 and 397,870 in 2011.