The calculated distance (air line) between Höchstädt an der Donau and Nürnberg is approximately 63 miles respectively 101 kilometers.
By car or train, the actual journey to Nürnberg is certainly longer, as only the direct route (as the crow flies) between Höchstädt an der Donau and Nürnberg has been calculated here.
Air line (approximately)
101 kilometers
54 nautical miles