The calculated distance (air line) between Liège and Woluwe-Saint-Lambert is approximately 52 miles respectively 83 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 Liège and Woluwe-Saint-Lambert has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles