- Seletar Airport is a military airport located in the northeastern part of Singapore. It is managed by the Changi Airport Group and primarily serves as a secondary civilian airport for private and business aviation, as well as for flight training and aircraft maintenance activities. Seletar Airport has a single runway and operates alongside Singapore's main international airport, Changi Airport. The airport also houses various aviation-related businesses, including aircraft maintenance, repair, and overhaul (MRO) facilities, making it an important hub for the aviation industry in Singapore.