The calculated distance (air line) between Linz and Klagenfurt am Wörthersee is approximately 116 miles respectively 187 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 Linz and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
187 kilometers
101 nautical miles