The nearest airport is GRZ - Graz, located 58.3 km south west of Kleinschlag.
Other airports nearby include VIE - Vienna Schwechat (93.2 km north east), MBX - Maribor (102.4 km south), BTS - Bratislava M R Stefanik (128.9 km north east), KLU - Klagenfurt (Worthersee Intl) (147.7 km south west),