The calculated distance (air line) between Kamp-Lintfort and Wachtendonk is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Wachtendonk is certainly longer, as only the direct route (as the crow flies) between Kamp-Lintfort and Wachtendonk has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles