The calculated distance (air line) between Wachtendonk and Niederkrüchten is approximately 15 miles respectively 25 kilometers.
By car or train, the actual journey to Niederkrüchten is certainly longer, as only the direct route (as the crow flies) between Wachtendonk and Niederkrüchten has been calculated here.
Air line (approximately)
25 kilometers
13 nautical miles