The Stuttgart-Rohr–Filderstadt line is an electrified, and mostly double-track line main railway in the German state of Baden-Württemberg. It branches in the Stuttgart district of Rohr from the Gäu Railway (Gäubahn) and runs via Oberaichen, Leinfelden, Echterdingen and Stuttgart Airport to Bernhausen, a district of Filderstadt. It is now part of the Stuttgart S-Bahn.