The nearest airport is KLU - Klagenfurt (Worthersee Intl), located 54.6 km south of Unterdorf.
Other airports nearby include GRZ - Graz (86.8 km east), LJU - Ljubliana Ljubljana (101.7 km south), LNZ - Linz (Horsching) (122.7 km north), SZG - Salzburg (123.2 km north west),