The calculated distance (air line) between Engis and Woluwe-Saint-Lambert is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Woluwe-Saint-Lambert is certainly longer, as only the direct route (as the crow flies) between Engis and Woluwe-Saint-Lambert has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles