The calculated distance (air line) between Samho-rodongjagu and Kaesŏng is approximately 154 miles respectively 248 kilometers.
By car or train, the actual journey to Kaesŏng is certainly longer, as only the direct route (as the crow flies) between Samho-rodongjagu and Kaesŏng has been calculated here.
Air line (approximately)
248 kilometers
134 nautical miles