The nearest airport is GRZ - Graz, located 85.8 km south east of Sonnberg.
Other airports nearby include LNZ - Linz (Horsching) (88.1 km north), KLU - Klagenfurt (Worthersee Intl) (95.1 km south), SZG - Salzburg (122.4 km west), LJU - Ljubliana Ljubljana (140.3 km south),