The nearest airport is KLU - Klagenfurt (Worthersee Intl), located 45.6 km west of Achalm.
Other airports nearby include GRZ - Graz (54.1 km north east), LJU - Ljubliana Ljubljana (59.9 km south west), MBX - Maribor (60.7 km east), ZAG - Zagreb (133.6 km south east),