The calculated distance (air line) between Ottakring and Klagenfurt am Wörthersee is approximately 144 miles respectively 232 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 Ottakring and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
232 kilometers
125 nautical miles