From Charles de Gaulle airport to HEC Paris Le Château:
Take RER B Train line from Aéroport Charles de Gaulle (CDG Terminal 1 & 2) in the direction of Saint-Rémy-lès-Chevreuse. Stop at the station Le Guichet. From Gare du Guichet (2 min walk from station) take the bus no°9 direction of Gare de Jouy-en-Josas. Stop at Gare de Jouy-en-Josas. The Château is 10 min walk.
 
From Orly airport to HEC Paris Le Château:
Take ORLYVAL Train line from Aéroport d'Orly 1-2-3 & 4 in the direction of Antony. At Antony take the RER B train line in the direction of Saint-Rémy-lès-Chevreuse. Stop at the station Le Guichet. From Gare du Guichet (2 min walk from station) take the bus no°9 direction of Gare de Jouy-en-Josas. Stop at Gare de Jouy-en-Josas. The Château is 10 min walk.
 
From Gare du Nord train station to HEC Paris Le Château:
Take RER B Train line in the direction of Saint-Rémy-lès-Chevreuse. Stop at the station Le Guichet. From Gare du Guichet (2 min walk from station) take the bus no°9 direction of Gare de Jouy-en-Josas. Stop at Gare de Jouy-en-Josas. The Château is 10 min walk.
 
From Versailles-Chantiers train station to HEC Paris Le Château:
Take RER C Train line in the direction of Pontoise. It is two stops to station Jouy-en-Josas. From Gare de Jouy-en-Josas, the Château is 10 min walk.
 
From the city of Paris (& neighboring areas) to HEC Paris:
In addition to public transports, regular SAVAC shuttles are available to HEC students, staff and visitors that drop you at the main campus entrance. The Château can be reached on foot (10 min walk). The schedule is available here and the main stops are:
 
HEC Campus - Pont de Sèvres - Porte Maillot
HEC Campus - Massy-Palaiseau (Massy Gare)
HEC Campus - Versailles Chantiers
HEC Campus - Denfert-Rochereau train station (weekends)