The calculated distance (air line) between Jettingen-Scheppach and Gundelfingen is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Gundelfingen is certainly longer, as only the direct route (as the crow flies) between Jettingen-Scheppach and Gundelfingen has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles