The nearest airport is VIE - Vienna Schwechat, located 60.5 km south east of Unterthern.
Other airports nearby include BRQ - Turany (88.6 km north east), BTS - Bratislava M R Stefanik (97.1 km east), PZY - Piestany (135.7 km east), LNZ - Linz (Horsching) (137.5 km west),