The calculated distance (air line) between T’ongch’ŏn-ŭp and Haeju is approximately 134 miles respectively 215 kilometers.
By car or train, the actual journey to Haeju is certainly longer, as only the direct route (as the crow flies) between T’ongch’ŏn-ŭp and Haeju has been calculated here.
Air line (approximately)
215 kilometers
116 nautical miles