The calculated distance (air line) between Haag and Klagenfurt am Wörthersee is approximately 114 miles respectively 183 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 Haag and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles