The calculated distance (air line) between Uijeongbu-si and Yŏnan-ŭp is approximately 50 miles respectively 80 kilometers.
By car or train, the actual journey to Yŏnan-ŭp is certainly longer, as only the direct route (as the crow flies) between Uijeongbu-si and Yŏnan-ŭp has been calculated here.
Air line (approximately)
80 kilometers
43 nautical miles