The calculated distance (air line) between Klagenfurt am Wörthersee and Jakomini is approximately 62 miles respectively 99 kilometers.
By car or train, the actual journey to Jakomini is certainly longer, as only the direct route (as the crow flies) between Klagenfurt am Wörthersee and Jakomini has been calculated here.
Air line (approximately)
99 kilometers
54 nautical miles