The calculated distance (air line) between Sint-Pieters-Leeuw and Woluwe-Saint-Lambert is approximately 9 miles respectively 15 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 Sint-Pieters-Leeuw and Woluwe-Saint-Lambert has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles