The calculated distance (air line) between Ubstadt-Weiher and Karlsruhe is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Karlsruhe is certainly longer, as only the direct route (as the crow flies) between Ubstadt-Weiher and Karlsruhe has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles