The calculated distance (air line) between Pukchil-lodongjagu and Sinŭiju is approximately 72 miles respectively 115 kilometers.
By car or train, the actual journey to Sinŭiju is certainly longer, as only the direct route (as the crow flies) between Pukchil-lodongjagu and Sinŭiju has been calculated here.
Air line (approximately)
115 kilometers
62 nautical miles