There are two major airports which serve the Paris region: Charles-de-Gaulle (Roissy) Airport, located north of Paris, and Orly Airport, located south of Paris near the CentraleSupélec campus. Châtenay-Malabry (i.e. CentraleSupélec and all the hotels noted under the Lodging menu) are accessible from either airport by the RER B metro line.
Roissy CDG: Roissy CDG is located at a northern terminus of the RER B metro line, which departs at regular intervals. Trains heading south will not all be heading to the same destination or stop at the same place. Before getting on the train, check the list of stops and ensure that your stop is on the display. For La Maison de l'Abbaye and Hotel Alixia, you will want the stop "Antony". For Hotel de Berny, you will want the stop "La Croix de Bergny". For Hotel Colbert, you will want the stop "Gare de Sceaux". The directions from each stop to the corresponding hotel are located on the 'Lodging' page.
Orly Airport: Orly airport is located very close to Châtenay-Malabry, though most international flights will arrive at Roissy CDG. Should you arrive at Orly, a short ride on the airport monorail "OrlyVal" will take you to the Antony RER metro station. From there, La Maison de l'Abbaye and Hotel Alixia are only a short walk away. For Hotel de Berny, you will want to take a northboud RER metro and stop at "La Croix de Bergny". For those of you staying at Hotel Colbert, you will need to catch a northbound RER metro (towards Paris) to the "Bourg-la-Reine" stop. There, you will need to get off and catch a southbound "Robinson" train and get off at the "Gare de Sceaux" stop. The directions from each stop to the corresponding hotel are located on the 'Lodging' page.