The calculated distance (air line) between Sŭngho 1-tong and Sangsŏng-ni is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Sangsŏng-ni is certainly longer, as only the direct route (as the crow flies) between Sŭngho 1-tong and Sangsŏng-ni has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles