The calculated distance (air line) between Sŭngho 1-tong and Manp’o is approximately 150 miles respectively 242 kilometers.
By car or train, the actual journey to Manp’o is certainly longer, as only the direct route (as the crow flies) between Sŭngho 1-tong and Manp’o has been calculated here.
Air line (approximately)
242 kilometers
131 nautical miles