The nearest airport is OBF - Oberpfaffenhofen, located 52.6 km north west of Grassau.
Other airports nearby include MUC - Munich Munchen (58.3 km north), FEL - Fuerstenfeldbruck Furstenfeldbruck (61.9 km north west), INN - Innsbruck (75.6 km south west), SZG - Salzburg (84.1 km east),