The calculated distance (air line) between Rommerskirchen and Korschenbroich is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Korschenbroich is certainly longer, as only the direct route (as the crow flies) between Rommerskirchen and Korschenbroich has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles