The calculated distance (air line) between Kowŏn-ŭp and Chaeryŏng-ŭp is approximately 113 miles respectively 182 kilometers.
By car or train, the actual journey to Chaeryŏng-ŭp is certainly longer, as only the direct route (as the crow flies) between Kowŏn-ŭp and Chaeryŏng-ŭp has been calculated here.
Air line (approximately)
182 kilometers
98 nautical miles