The calculated distance (air line) between Kowŏn-ŭp and Yŏngbyŏn is approximately 81 miles respectively 130 kilometers.
By car or train, the actual journey to Yŏngbyŏn is certainly longer, as only the direct route (as the crow flies) between Kowŏn-ŭp and Yŏngbyŏn has been calculated here.