The calculated distance (air line) between Uíge and Mbanza-Ngungu is approximately 163 miles respectively 262 kilometers.
By car or train, the actual journey to Mbanza-Ngungu is certainly longer, as only the direct route (as the crow flies) between Uíge and Mbanza-Ngungu has been calculated here.
Air line (approximately)
262 kilometers
142 nautical miles