The calculated distance (air line) between Iwŏn-ŭp and T’ongch’ŏn-ŭp is approximately 103 miles respectively 166 kilometers.
By car or train, the actual journey to T’ongch’ŏn-ŭp is certainly longer, as only the direct route (as the crow flies) between Iwŏn-ŭp and T’ongch’ŏn-ŭp has been calculated here.
Air line (approximately)
166 kilometers
89 nautical miles