The calculated distance (air line) between Hyesan-dong and Sŭngjibaegam is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to Sŭngjibaegam is certainly longer, as only the direct route (as the crow flies) between Hyesan-dong and Sŭngjibaegam has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles