The calculated distance (air line) between Rebecq-Rognon and Uccle is approximately 15 miles respectively 23 kilometers.
By car or train, the actual journey to Uccle is certainly longer, as only the direct route (as the crow flies) between Rebecq-Rognon and Uccle has been calculated here.
Air line (approximately)
23 kilometers
13 nautical miles