The calculated distance (air line) between Chasŏng and Yuktae-dong is approximately 127 miles respectively 205 kilometers.
By car or train, the actual journey to Yuktae-dong is certainly longer, as only the direct route (as the crow flies) between Chasŏng and Yuktae-dong has been calculated here.
Air line (approximately)
205 kilometers
110 nautical miles