The calculated distance (air line) between Pukchil-lodongjagu and Haeju is approximately 149 miles respectively 240 kilometers.
By car or train, the actual journey to Haeju is certainly longer, as only the direct route (as the crow flies) between Pukchil-lodongjagu and Haeju has been calculated here.
Air line (approximately)
240 kilometers
130 nautical miles