The calculated distance (air line) between Pukchil-lodongjagu and Hyesan-dong is approximately 152 miles respectively 244 kilometers.
By car or train, the actual journey to Hyesan-dong is certainly longer, as only the direct route (as the crow flies) between Pukchil-lodongjagu and Hyesan-dong has been calculated here.
Air line (approximately)
244 kilometers
132 nautical miles