The calculated distance (air line) between Korschenbroich and Monheim am Rhein is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Monheim am Rhein is certainly longer, as only the direct route (as the crow flies) between Korschenbroich and Monheim am Rhein has been calculated here.
Air line (approximately)
29 kilometers
15 nautical miles