The calculated distance (air line) between Sint-Martens-Lennik and Etterbeek is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Etterbeek is certainly longer, as only the direct route (as the crow flies) between Sint-Martens-Lennik and Etterbeek has been calculated here.
Air line (approximately)
16 kilometers
8 nautical miles