The calculated distance (air line) between Sariwŏn and P’yŏngsŏng is approximately 51 miles respectively 83 kilometers.
By car or train, the actual journey to P’yŏngsŏng is certainly longer, as only the direct route (as the crow flies) between Sariwŏn and P’yŏngsŏng has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles