The nearest airport is MLH - Bale Mulhouse, located 33.8 km south west of Grunern.
Other airports nearby include CMR - Colmar Houssen (38.0 km north west), ZQL - Donaueschingen Villingen (61.4 km east), SXB - Strassbourg Entzheim (75.0 km north), ZRH - Zurich (76.9 km south east),