The calculated distance (air line) between Guntramsdorf and Klagenfurt am Wörthersee is approximately 136 miles respectively 219 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 Guntramsdorf and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
219 kilometers
118 nautical miles