The calculated distance (air line) between Ludweiler-Warndt and Schmelz is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Schmelz is certainly longer, as only the direct route (as the crow flies) between Ludweiler-Warndt and Schmelz has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles