The calculated distance (air line) between Sinsang-ni and P’yŏngsŏng is approximately 87 miles respectively 139 kilometers.
By car or train, the actual journey to P’yŏngsŏng is certainly longer, as only the direct route (as the crow flies) between Sinsang-ni and P’yŏngsŏng has been calculated here.
Air line (approximately)
139 kilometers
75 nautical miles