The nearest airport is GRZ - Graz, located 53.0 km south of Sonnberg.
Other airports nearby include VIE - Vienna Schwechat (108.4 km north east), MBX - Maribor (110.8 km south), KLU - Klagenfurt (Worthersee Intl) (126.4 km south west), LNZ - Linz (Horsching) (129.1 km north west),