The calculated distance (air line) between Uijeongbu-si and Gwangmyeong is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Gwangmyeong is certainly longer, as only the direct route (as the crow flies) between Uijeongbu-si and Gwangmyeong has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles