The calculated distance (air line) between Sŭngjibaegam and Musan-ŭp is approximately 71 miles respectively 114 kilometers.
By car or train, the actual journey to Musan-ŭp is certainly longer, as only the direct route (as the crow flies) between Sŭngjibaegam and Musan-ŭp has been calculated here.
Air line (approximately)
114 kilometers
62 nautical miles