The calculated distance (air line) between Yangp'yŏng and Hongch’ŏn is approximately 26 miles respectively 41 kilometers.
By car or train, the actual journey to Hongch’ŏn is certainly longer, as only the direct route (as the crow flies) between Yangp'yŏng and Hongch’ŏn has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles