Brandywine Airport (ICAO: KOQN, FAA LID: OQN, formerly N99) is a public-use general aviation airport in West Goshen Township, Pennsylvania, three miles northeast of West Chester. It is designated as a reliever airport and a regional general aviation airport by the FAA. It is privately owned by the New Brandywine Airport Club Inc, with a single fixed-base operator (New Brandywine Aero, Inc.), aircraft repair, as well as flight training in both fixed-wing and rotary aircraft. The American Helicopter Museum and Education Center is located adjacent to the airport, with taxiway access.