The nearest airport is LNZ - Linz (Horsching), located 73.4 km north of Sonnberg.
Other airports nearby include GRZ - Graz (100.0 km south east), KLU - Klagenfurt (Worthersee Intl) (106.9 km south), SZG - Salzburg (111.8 km west), LJU - Ljubliana Ljubljana (153.0 km south),