The calculated distance (air line) between Nachrodt-Wiblingwerde and Fröndenberg is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Fröndenberg is certainly longer, as only the direct route (as the crow flies) between Nachrodt-Wiblingwerde and Fröndenberg has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles