The calculated distance (air line) between Spittal an der Drau and Klagenfurt am Wörthersee is approximately 40 miles respectively 64 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 Spittal an der Drau and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles