The calculated distance (air line) between Pukchil-lodongjagu and Sariwŏn is approximately 117 miles respectively 188 kilometers.
By car or train, the actual journey to Sariwŏn is certainly longer, as only the direct route (as the crow flies) between Pukchil-lodongjagu and Sariwŏn has been calculated here.
Air line (approximately)
188 kilometers
102 nautical miles