The calculated distance (air line) between Sangsŏng-ni and Manp’o is approximately 141 miles respectively 226 kilometers.
By car or train, the actual journey to Manp’o is certainly longer, as only the direct route (as the crow flies) between Sangsŏng-ni and Manp’o has been calculated here.
Air line (approximately)
226 kilometers
122 nautical miles