Castelldefels is a Rodalies de Catalunya railway station serving Castelldefels, in Catalonia, Spain. It is served by Barcelona commuter rail service lines and, as well as some trains on regional lines , and. The station has five platforms: platforms 1 and 2 are the through platforms, platform 4 is for trains terminating or starting at the station, and platforms 3 and 5 are bay platforms, sometimes used by trains at the beginning or end of service. The stations on either side are Gavà (heading towards Barcelona) and Platja de Castelldefels (heading away from Barcelona).