The calculated distance (air line) between Jettingen-Scheppach and Dietenheim is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Dietenheim is certainly longer, as only the direct route (as the crow flies) between Jettingen-Scheppach and Dietenheim has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles