The calculated distance (air line) between Yonggang-ŭp and Hwangju-ŭp is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Hwangju-ŭp is certainly longer, as only the direct route (as the crow flies) between Yonggang-ŭp and Hwangju-ŭp has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles