The calculated distance (air line) between Nachrodt-Wiblingwerde and Sundern is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Sundern is certainly longer, as only the direct route (as the crow flies) between Nachrodt-Wiblingwerde and Sundern has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles