The calculated distance (air line) between Manp’o and P’yŏngsŏng is approximately 134 miles respectively 215 kilometers.
By car or train, the actual journey to P’yŏngsŏng is certainly longer, as only the direct route (as the crow flies) between Manp’o and P’yŏngsŏng has been calculated here.
Air line (approximately)
215 kilometers
116 nautical miles