The calculated distance (air line) between Sakchu-ŭp and Hwangju-ŭp is approximately 125 miles respectively 201 kilometers.
By car or train, the actual journey to Hwangju-ŭp is certainly longer, as only the direct route (as the crow flies) between Sakchu-ŭp and Hwangju-ŭp has been calculated here.
Air line (approximately)
201 kilometers
109 nautical miles