The nearest airport is SZG - Salzburg, located 41.6 km east of Grassau.
Other airports nearby include MUC - Munich Munchen (80.4 km north west), OBF - Oberpfaffenhofen (93.3 km west), FEL - Fuerstenfeldbruck Furstenfeldbruck (100.0 km north west), INN - Innsbruck (101.6 km south west),