Onchon Air Base(온천비행장) is an air base near Onchon, Pyongan-namdo, North Korea. Facilities The airfield has a single concrete runway 01/19 measuring 8150 x 170 feet (2484 x 52 m). It has a full-length parallel taxiway and several aprons and hangars. It is on the west coast of North Korea and approximately west of Pyongyang. Approximately to the southeast of the air base is an underground aviation complex with runways extending outwards from the tunnel systems. References Airports in North Korea South Pyongan