The calculated distance (air line) between Walhain-Saint-Paul and La Louvière is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to La Louvière is certainly longer, as only the direct route (as the crow flies) between Walhain-Saint-Paul and La Louvière has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles