The calculated distance (air line) between Ühlingen-Birkendorf and Karlsruhe is approximately 89 miles respectively 144 kilometers.
By car or train, the actual journey to Karlsruhe is certainly longer, as only the direct route (as the crow flies) between Ühlingen-Birkendorf and Karlsruhe has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles