The calculated distance (air line) between Namp’o and Sŭngho 1-tong is approximately 35 miles respectively 57 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 Namp’o and Sŭngho 1-tong has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles