The calculated distance (air line) between Monceau-sur-Sambre and Etterbeek is approximately 29 miles respectively 46 kilometers.
By car or train, the actual journey to Etterbeek is certainly longer, as only the direct route (as the crow flies) between Monceau-sur-Sambre and Etterbeek has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles