The calculated distance (air line) between Habay-la-Vieille and Leuven is approximately 90 miles respectively 144 kilometers.
By car or train, the actual journey to Leuven is certainly longer, as only the direct route (as the crow flies) between Habay-la-Vieille and Leuven has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles