The calculated distance (air line) between Sŭngam-nodongjagu and Hamhŭng is approximately 165 miles respectively 265 kilometers.
By car or train, the actual journey to Hamhŭng is certainly longer, as only the direct route (as the crow flies) between Sŭngam-nodongjagu and Hamhŭng has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles