The calculated distance (air line) between Kusŏng and Sŭngho 1-tong is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Sŭngho 1-tong is certainly longer, as only the direct route (as the crow flies) between Kusŏng and Sŭngho 1-tong has been calculated here.
Air line (approximately)
127 kilometers
68 nautical miles