The calculated distance (air line) between Klagenfurt am Wörthersee and Steyr is approximately 98 miles respectively 158 kilometers.
By car or train, the actual journey to Steyr is certainly longer, as only the direct route (as the crow flies) between Klagenfurt am Wörthersee and Steyr has been calculated here.
Air line (approximately)
158 kilometers
85 nautical miles