The nearest airport is GRZ - Graz, located 43.4 km east of Theissenegg.
Other airports nearby include KLU - Klagenfurt (Worthersee Intl) (51.1 km south west), MBX - Maribor (78.0 km south east), LJU - Ljubliana Ljubljana (83.0 km south west), LNZ - Linz (Horsching) (156.0 km north),