The calculated distance (air line) between Cheongju-si and Uijeongbu-si is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Uijeongbu-si is certainly longer, as only the direct route (as the crow flies) between Cheongju-si and Uijeongbu-si has been calculated here.
Air line (approximately)
129 kilometers
70 nautical miles