The calculated distance (air line) between Hwangju-ŭp and Sŭngho 1-tong is approximately 25 miles respectively 40 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 Hwangju-ŭp and Sŭngho 1-tong has been calculated here.
Air line (approximately)
40 kilometers
21 nautical miles