The calculated distance (air line) between Kowŏn-ŭp and Sunch’ŏn is approximately 70 miles respectively 113 kilometers.
By car or train, the actual journey to Sunch’ŏn is certainly longer, as only the direct route (as the crow flies) between Kowŏn-ŭp and Sunch’ŏn has been calculated here.