The calculated distance (air line) between Sakchu-ŭp and Chaeryŏng-ŭp is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Chaeryŏng-ŭp is certainly longer, as only the direct route (as the crow flies) between Sakchu-ŭp and Chaeryŏng-ŭp has been calculated here.
Air line (approximately)
227 kilometers
122 nautical miles