The calculated distance (air line) between Pradl and Klagenfurt am Wörthersee is approximately 143 miles respectively 231 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 Pradl and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
231 kilometers
124 nautical miles