Nagasaki Airport (長崎空港, Nagasaki Kūkō) (IATA: NGS, ICAO: RJFU) is an airport located off the coast of Ōmura, Nagasaki Prefecture, Japan. The airport was the first airport in the world to be built on the ocean, using an existing small island located in the center of Ōmura Bay, with land areas that were fully reclaimed.

Nagasaki Airport was built to replace the former airport called Omura Airport, which was located on the mainland and had a shorter runway of 1,200 metres (3,900 ft). The former airport was transferred to the Japan Self-Defense Force in 2011, and was renamed into Omura Air Base.

Oriental Air Bridge, a regional airline is based at the airport.