The calculated distance (air line) between Chaeryŏng-ŭp and Kwaksan is approximately 94 miles respectively 150 kilometers.
By car or train, the actual journey to Kwaksan is certainly longer, as only the direct route (as the crow flies) between Chaeryŏng-ŭp and Kwaksan has been calculated here.
Air line (approximately)
150 kilometers
81 nautical miles