Yellowstone Airport (IATA: WYS, ICAO: KWYS, FAA LID: WYS) is a state-owned public-use airport located adjacent to U.S. 191/U.S. 287 one nautical mile (2 km) north of the central business district of West Yellowstone, a town in Gallatin County, Montana, United States. Although only open from June through September, commercial passenger service is available during those months. Scheduled airline service is subsidized by the federal Essential Air Service (EAS) program.

As per Federal Aviation Administration records, the airport had 4,186 passenger boardings (enplanements) in calendar year 2008, 4,331 enplanements in 2009, and 4,451 in 2010. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a non-primary commercial service airport (between 2,500 and 10,000 enplanements per year).

The town of West Yellowstone is located near the west entrance to Yellowstone National Park. The airport should not be confused with Yellowstone Regional Airport in Cody, Wyoming or Yellowstone International Airport between Belgrade and Bozeman, Montana, which are 104 miles (167 km) and 88 miles (144 km), respectively, from this airport and about 53 miles (85 km) from the east entrance of Yellowstone National Park (Yellowstone Regional) and about 88 miles (142 km) from the north entrance or west entrance (Yellowstone International). In the past the Official Airline Guide (OAG) referred to the Yellowstone Airport in its scheduled airline flight listings as West Yellowstone (WYS).