The calculated distance (air line) between Ludweiler-Warndt and Merchweiler is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Merchweiler is certainly longer, as only the direct route (as the crow flies) between Ludweiler-Warndt and Merchweiler has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles