The calculated distance (air line) between Yŏnggwang-ŭp and Sinsang-ni is approximately 26 miles respectively 41 kilometers.
By car or train, the actual journey to Sinsang-ni is certainly longer, as only the direct route (as the crow flies) between Yŏnggwang-ŭp and Sinsang-ni has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles