The calculated distance (air line) between Chŏngju and P’yŏngsŏng is approximately 47 miles respectively 75 kilometers.
By car or train, the actual journey to P’yŏngsŏng is certainly longer, as only the direct route (as the crow flies) between Chŏngju and P’yŏngsŏng has been calculated here.
Air line (approximately)
75 kilometers
41 nautical miles