The calculated distance (air line) between Imst and Klagenfurt am Wörthersee is approximately 174 miles respectively 279 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 Imst and Klagenfurt am Wörthersee has been calculated here.
Air line (approximately)
279 kilometers
151 nautical miles