The calculated distance (air line) between Sankt Martin and Klagenfurt am Wörthersee is approximately 111 miles respectively 179 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 Sankt Martin and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
179 kilometers
96 nautical miles