The calculated distance (air line) between Songwŏn-ŭp and P’yŏngsŏng is approximately 81 miles respectively 131 kilometers.
By car or train, the actual journey to P’yŏngsŏng is certainly longer, as only the direct route (as the crow flies) between Songwŏn-ŭp and P’yŏngsŏng has been calculated here.
Air line (approximately)
131 kilometers
71 nautical miles