The calculated distance (air line) between Yonggang-ŭp and Sariwŏn is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Sariwŏn is certainly longer, as only the direct route (as the crow flies) between Yonggang-ŭp and Sariwŏn has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles