the last train leaves "boulogne – pont de saint cloud" at 12:47 am destined for "gare d'austerlitz". from "gare d'austerlitz", the last train leaves at 12:35 am for "boulogne – pont de saint-cloud" and another for "porte d'auteuil" at 12:51 am. from friday night to sunday and during holidays, the last departure from "boulogne – pont de saint-cloud" leaves at 1:47 am for "gare d'austerlitz". from this terminus, the last departure takes place at 1:35 am for "boulogne – pont de saint-cloud" and at 1:46 am for "port d'auteuil".