The calculated distance (air line) between Spratzern and Klagenfurt am Wörthersee is approximately 123 miles respectively 198 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 Spratzern and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
198 kilometers
107 nautical miles