Klagenfurt Airport is served by 1 airline, flying from/to 2 destinationsLongest flight from Klagenfurt Airport is Klagenfurt am Worthersee to 🇦🇹 Vienna (VIE), which takes around 55 minutes. On an airline like Austrian Airlines. More info on this flight route (KLU-VIE).Shortest flight from Klagenfurt Airport is Klagenfurt am Worthersee to 🇦🇹 Vienna (VIE), which takes around 55 minutes. On an airline like Austrian Airlines. More info on this flight route (KLU-VIE).