The calculated distance (air line) between Wŏnsan and T’ongch’ŏn-ŭp is approximately 28 miles respectively 45 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 Wŏnsan and T’ongch’ŏn-ŭp has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles