The calculated distance (air line) between Yŏnggwang-ŭp and Paek'ak is approximately 105 miles respectively 170 kilometers.
By car or train, the actual journey to Paek'ak is certainly longer, as only the direct route (as the crow flies) between Yŏnggwang-ŭp and Paek'ak has been calculated here.
Air line (approximately)
170 kilometers
92 nautical miles