The calculated distance (air line) between Mechelen-aan-de-Maas and Kortrijk is approximately 106 miles respectively 171 kilometers.
By car or train, the actual journey to Kortrijk is certainly longer, as only the direct route (as the crow flies) between Mechelen-aan-de-Maas and Kortrijk has been calculated here.
Air line (approximately)
171 kilometers
92 nautical miles