The nearest airport is KLU - Klagenfurt (Worthersee Intl), located 43.6 km south of Unteralpe.
Other airports nearby include GRZ - Graz (88.0 km east), LJU - Ljubliana Ljubljana (91.0 km south), MBX - Maribor (123.6 km south east), SZG - Salzburg (128.3 km north west),