The calculated distance (air line) between Bonn and Wezembeek-Oppem is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Wezembeek-Oppem is certainly longer, as only the direct route (as the crow flies) between Bonn and Wezembeek-Oppem has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles