The calculated distance (air line) between Hoeyang and Yŏnggwang-ŭp is approximately 91 miles respectively 146 kilometers.
By car or train, the actual journey to Yŏnggwang-ŭp is certainly longer, as only the direct route (as the crow flies) between Hoeyang and Yŏnggwang-ŭp has been calculated here.
Air line (approximately)
146 kilometers
79 nautical miles