The calculated distance (air line) between Neietsu and Yangp'yŏng is approximately 58 miles respectively 93 kilometers.
By car or train, the actual journey to Yangp'yŏng is certainly longer, as only the direct route (as the crow flies) between Neietsu and Yangp'yŏng has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles