The calculated distance (air line) between Wiener Neudorf and Klagenfurt am Wörthersee is approximately 138 miles respectively 222 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 Neudorf and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
222 kilometers
120 nautical miles