The calculated distance (air line) between Auen and Klagenfurt am Wörthersee is approximately 22 miles respectively 35 kilometers.
By car or train, the actual journey to Klagenfurt am Wörthersee is certainly longer, as only the direct route (as the crow flies) between Auen and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
35 kilometers
19 nautical miles