Nowshahr Airport (IATA: NSH, ICAO: OINN) is a small regional airport located near the city of Nowshahr on the southern coast of the Caspian Sea in Mazandaran Province, northern Iran. It serves domestic routes connecting the region to Tehran and other Iranian cities, catering primarily to leisure travelers visiting the popular Caspian coastal area. The airport operates limited scheduled domestic services and has historically been used for both civilian and military purposes. Its location in a mountainous coastal environment presents operational considerations for pilots and airlines serving the route. Nowshahr is a popular resort destination for Iranians, and the airport sees increased demand during holiday seasons when travelers seek alternatives to the congested roads leading to the Caspian coast.