The nearest airport is KLU - Klagenfurt (Worthersee Intl), located 26.1 km south east of Köttern.
Other airports nearby include LJU - Ljubliana Ljubljana (69.5 km south east), GRZ - Graz (106.7 km east), TRS - Ronchi De Legionari Ronchi Dei Legionari (116.4 km south west), MBX - Maribor (128.3 km east),