The calculated distance (air line) between Helchteren and Woluwe-Saint-Lambert is approximately 44 miles respectively 71 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 Helchteren and Woluwe-Saint-Lambert has been calculated here.
Air line (approximately)
71 kilometers
38 nautical miles