The calculated distance (air line) between Rebecq-Rognon and Leuven is approximately 30 miles respectively 49 kilometers.
By car or train, the actual journey to Leuven is certainly longer, as only the direct route (as the crow flies) between Rebecq-Rognon and Leuven has been calculated here.
Air line (approximately)
49 kilometers
26 nautical miles