The calculated distance (air line) between Gilly and Molenbeek-Saint-Jean is approximately 30 miles respectively 49 kilometers.
By car or train, the actual journey to Molenbeek-Saint-Jean is certainly longer, as only the direct route (as the crow flies) between Gilly and Molenbeek-Saint-Jean has been calculated here.
Air line (approximately)
49 kilometers
26 nautical miles