The nearest airport is KLU - Klagenfurt (Worthersee Intl), located 31.9 km west of Unterrain.
Other airports nearby include LJU - Ljubliana Ljubljana (55.8 km south west), GRZ - Graz (62.8 km north east), MBX - Maribor (75.2 km east), TRS - Ronchi De Legionari Ronchi Dei Legionari (137.0 km south west),