The nearest airport is LNZ - Linz (Horsching), located 85.5 km north of Sonnberg.
Other airports nearby include GRZ - Graz (88.9 km south east), KLU - Klagenfurt (Worthersee Intl) (96.5 km south), SZG - Salzburg (119.4 km west), LJU - Ljubliana Ljubljana (142.0 km south),