The calculated distance (air line) between Deizisau and Dettingen an der Erms is approximately 13 miles respectively 20 kilometers.
By car or train, the actual journey to Dettingen an der Erms is certainly longer, as only the direct route (as the crow flies) between Deizisau and Dettingen an der Erms has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles