The calculated distance (air line) between Pont-à-Celles and Etterbeek is approximately 23 miles respectively 36 kilometers.
By car or train, the actual journey to Etterbeek is certainly longer, as only the direct route (as the crow flies) between Pont-à-Celles and Etterbeek has been calculated here.
Air line (approximately)
36 kilometers
20 nautical miles