The calculated distance (air line) between Gongchangling and Yŏmju-ŭp is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Yŏmju-ŭp is certainly longer, as only the direct route (as the crow flies) between Gongchangling and Yŏmju-ŭp has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles