The calculated distance (air line) between Kasongo-Lunda and Mbanza Kongo is approximately 178 miles respectively 286 kilometers.
By car or train, the actual journey to Mbanza Kongo is certainly longer, as only the direct route (as the crow flies) between Kasongo-Lunda and Mbanza Kongo has been calculated here.
Air line (approximately)
286 kilometers
154 nautical miles