The calculated distance (air line) between Daejeon and Uijeongbu-si is approximately 98 miles respectively 158 kilometers.
By car or train, the actual journey to Uijeongbu-si is certainly longer, as only the direct route (as the crow flies) between Daejeon and Uijeongbu-si has been calculated here.
Air line (approximately)
158 kilometers
85 nautical miles