The calculated distance (air line) between Mörfelden-Walldorf and Nürnberg is approximately 117 miles respectively 189 kilometers.
By car or train, the actual journey to Nürnberg is certainly longer, as only the direct route (as the crow flies) between Mörfelden-Walldorf and Nürnberg has been calculated here.
Air line (approximately)
189 kilometers
102 nautical miles