Nashua Airport at Boire Field (IATA: ASH, ICAO: KASH, FAA LID: ASH) is a public-use airport located three nautical miles (6 km) northwest of the central business district of Nashua, a city in Hillsborough County, New Hampshire, United States. Owned by the Nashua Airport Authority, It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a national reliever airport facility.