The calculated distance (air line) between Uijeongbu-si and Namyangju is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Namyangju is certainly longer, as only the direct route (as the crow flies) between Uijeongbu-si and Namyangju has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles