The calculated distance (air line) between Merksem and Woluwe-Saint-Lambert is approximately 28 miles respectively 45 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 Merksem and Woluwe-Saint-Lambert has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles