Big Sky Airport

Big Sky Airport is a county-owned, public-use airport located six nautical miles southeast of the central business district of Ennis, a town in Madison County, Montana, United States. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation airport.
Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this facility is assigned EKS by the FAA but has no designation from the IATA.

Facilities and aircraft

Big Sky Airport has one runway designated 16/34 with an asphalt surface measuring 7,600 by 100 feet.
For the 12-month period ending July 21, 2019, the airport had 12,350 aircraft operations, an average of 34 per day: 93% general aviation, 6% air taxi, and <1% military. At that time there were 34 aircraft based at this airport: 30 single-engine, 2 multi-engine, and 2 helicopter.
Ascension FBO Network, the airport's fixed-base operator, offers fuel, aircraft/hangar rental, and other services.
On 19 February 2020, Big Sky Airport was awarded a $5.6 million FAA grant to extend the main taxiway to 7,600 ft, repave portions of the runway, and expand the airport property.