The calculated distance (air line) between Kyŏngwŏn and Tavrichanka is approximately 93 miles respectively 149 kilometers.
By car or train, the actual journey to Tavrichanka is certainly longer, as only the direct route (as the crow flies) between Kyŏngwŏn and Tavrichanka has been calculated here.
Air line (approximately)
149 kilometers
81 nautical miles