The calculated distance (air line) between Steyr and Klagenfurt am Wörthersee is approximately 98 miles respectively 158 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 Steyr and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
158 kilometers
85 nautical miles