The calculated distance (air line) between Wiener Neustadt and Klagenfurt am Wörthersee is approximately 122 miles respectively 196 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 Wiener Neustadt and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
196 kilometers
106 nautical miles