Thompson Falls Airport (IATA: THM, ICAO: KTHM, FAA LID: THM) is a county-owned, public-use airport located three nautical miles (6 km) southeast of the central business district of Thompson Falls, a city in Sanders County, Montana, United States.

[2] Thompson Falls Airport covers an area of 136 acres (55 ha) at an elevation of 2,467 feet (752 m) above mean sea level.

It has one runway designated 7/25 with an asphalt surface measuring 4,200 by 75 feet (1,280 x 23 m).

[1] For the 12-month period ending July 22, 2008, the airport had 7,000 general aviation aircraft operations, an average of 19 per day.

At that time there were 12 aircraft based at this airport, all single-engine.