The calculated distance (air line) between Kanggye and Sŭngjibaegam is approximately 117 miles respectively 188 kilometers.
By car or train, the actual journey to Sŭngjibaegam is certainly longer, as only the direct route (as the crow flies) between Kanggye and Sŭngjibaegam has been calculated here.
Air line (approximately)
188 kilometers
101 nautical miles