The nearest airport is GRZ - Graz, located 24.5 km north of Zelko.
Other airports nearby include MBX - Maribor (43.2 km south east), KLU - Klagenfurt (Worthersee Intl) (77.7 km west), LJU - Ljubliana Ljubljana (91.6 km south west), ZAG - Zagreb (128.8 km south east),