The calculated distance (air line) between Uijeongbu-si and Hongch’ŏn is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Hongch’ŏn is certainly longer, as only the direct route (as the crow flies) between Uijeongbu-si and Hongch’ŏn has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles