The nearest airport is VIE - Vienna Schwechat, located 70.4 km north of Und.
Other airports nearby include BTS - Bratislava M R Stefanik (85.5 km north east), GRZ - Graz (110.0 km south west), MBX - Maribor (135.6 km south west), PZY - Piestany (152.3 km north east),