The calculated distance (air line) between Bucheon-si and Yŏnan-ŭp is approximately 44 miles respectively 71 kilometers.
By car or train, the actual journey to Yŏnan-ŭp is certainly longer, as only the direct route (as the crow flies) between Bucheon-si and Yŏnan-ŭp has been calculated here.
Air line (approximately)
71 kilometers
38 nautical miles