Easton State Airport (IATA: ESW, ICAO: KESW, FAA LID: ESW) is a public use airport located two nautical miles (3.7 km) north of the central business district of Easton, in Kittitas County, Washington, United States.

[1] It was constructed in the 1930s by the federal government as an emergency field for DC-3s crossing the Cascades through Snoqualmie Pass.

Easton remains as an important airport on the eastern approaches to Snoqualmie and Stampede Pass.

[1] Field elevation is 2,226 feet (678 m),[1] and density altitude problems can be encountered in the summer.

[citation needed] For the 12-month period ending May 31, 2007, the airport had 300 general aviation aircraft operations, an average of 25 per month.