Oita Airport (大分空港, Ōita Kūkō) (IATA: OIT, ICAO: RJFO) is an international airport in Kunisaki City, Ōita Prefecture Japan, 16 NM (30 km; 18 mi) northeast of Ōita City.

Oita Airport is an offshore airport built on reclaimed coastal waters off the Kunisaki Peninsula. It opened as New Oita Airport in 1971 as a replacement for the old Oita Airport within Oita City. In 2018, the airport had 2.1 million passengers.

The airport is accessible by bus but not by train. Hovercraft service to Oita City was available until it was suspended in 2009, the last hovercraft service to operate in Japan. However, in 2020, Oita Prefecture announced it would reintroduce hovercraft service to Oita city with three new hovercraft. These new hovercraft are scheduled to being service in fall of 2024.

In 2021, Virgin Orbit announced plans to use Oita Airport for its launch site. However, the company went bankrupt in 2023. Oita Prefecture plans to continue developing Oita Airport as Japan's first spaceport.