The calculated distance (air line) between Manp’o and Hwangju-ŭp is approximately 174 miles respectively 280 kilometers.
By car or train, the actual journey to Hwangju-ŭp is certainly longer, as only the direct route (as the crow flies) between Manp’o and Hwangju-ŭp has been calculated here.
Air line (approximately)
280 kilometers
151 nautical miles