The calculated distance (air line) between Perg and Klagenfurt am Wörthersee is approximately 113 miles respectively 182 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 Perg and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
182 kilometers
98 nautical miles