The calculated distance (air line) between Hŭngnam and Pukchil-lodongjagu is approximately 103 miles respectively 165 kilometers.
By car or train, the actual journey to Pukchil-lodongjagu is certainly longer, as only the direct route (as the crow flies) between Hŭngnam and Pukchil-lodongjagu has been calculated here.
Air line (approximately)
165 kilometers
89 nautical miles