The calculated distance (air line) between Hwangju-ŭp and Sariwŏn is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Sariwŏn is certainly longer, as only the direct route (as the crow flies) between Hwangju-ŭp and Sariwŏn has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles