The calculated distance (air line) between Kop’ung and Hyesan-dong is approximately 129 miles respectively 208 kilometers.
By car or train, the actual journey to Hyesan-dong is certainly longer, as only the direct route (as the crow flies) between Kop’ung and Hyesan-dong has been calculated here.
Air line (approximately)
208 kilometers
112 nautical miles