The nearest airport is VIE - Vienna Schwechat, located 74.4 km north east of Kleinau.
Other airports nearby include GRZ - Graz (83.0 km south), BTS - Bratislava M R Stefanik (118.9 km north east), LNZ - Linz (Horsching) (133.1 km north west), MBX - Maribor (135.8 km south),