The calculated distance (air line) between Oud-Turnhout and La Louvière is approximately 67 miles respectively 108 kilometers.
By car or train, the actual journey to La Louvière is certainly longer, as only the direct route (as the crow flies) between Oud-Turnhout and La Louvière has been calculated here.
Air line (approximately)
108 kilometers
58 nautical miles