The calculated distance (air line) between Yŏnggwang-ŭp and Sinŭiju is approximately 162 miles respectively 260 kilometers.
By car or train, the actual journey to Sinŭiju is certainly longer, as only the direct route (as the crow flies) between Yŏnggwang-ŭp and Sinŭiju has been calculated here.
Air line (approximately)
260 kilometers
140 nautical miles