The calculated distance (air line) between T’ongch’ŏn-ŭp and Kaesŏng is approximately 99 miles respectively 160 kilometers.
By car or train, the actual journey to Kaesŏng is certainly longer, as only the direct route (as the crow flies) between T’ongch’ŏn-ŭp and Kaesŏng has been calculated here.
Air line (approximately)
160 kilometers
86 nautical miles