The nearest airport is GWT - Westerland Sylt, located 29.0 km south west of Harknag.
Other airports nearby include SKS - Skrydstrup (40.3 km north east), EBJ - Esbjerg (50.0 km north), SGD - Soenderborg Sonderborg (72.1 km east), BLL - Billund (78.9 km north),