The calculated distance (air line) between Dettingen an der Erms and Nürnberg is approximately 101 miles respectively 163 kilometers.
By car or train, the actual journey to Nürnberg is certainly longer, as only the direct route (as the crow flies) between Dettingen an der Erms and Nürnberg has been calculated here.
Air line (approximately)
163 kilometers
88 nautical miles