The calculated distance (air line) between Wŏnsan and Yuktae-dong is approximately 71 miles respectively 115 kilometers.
By car or train, the actual journey to Yuktae-dong is certainly longer, as only the direct route (as the crow flies) between Wŏnsan and Yuktae-dong has been calculated here.
Air line (approximately)
115 kilometers
62 nautical miles