The calculated distance (air line) between Yŏnggwang-ŭp and Sŭngho 1-tong is approximately 106 miles respectively 171 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 Yŏnggwang-ŭp and Sŭngho 1-tong has been calculated here.
Air line (approximately)
171 kilometers
92 nautical miles