The calculated distance (air line) between Berchem-Sainte-Agathe and Mechelen is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Mechelen is certainly longer, as only the direct route (as the crow flies) between Berchem-Sainte-Agathe and Mechelen has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles