The calculated distance (air line) between Iwŏn-ŭp and Kujang-ŭp is approximately 142 miles respectively 229 kilometers.
By car or train, the actual journey to Kujang-ŭp is certainly longer, as only the direct route (as the crow flies) between Iwŏn-ŭp and Kujang-ŭp has been calculated here.