The calculated distance (air line) between Fontaine-l'Évêque and Etterbeek is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Etterbeek is certainly longer, as only the direct route (as the crow flies) between Fontaine-l'Évêque and Etterbeek has been calculated here.
Air line (approximately)
47 kilometers
26 nautical miles