The CNRS campus of Gif-sur-Yvette is located at about 30km south-west from Paris, and is accessible from Paris and airports, by the RER B, "Gif-sur-Yvette" station. (https://www.ratp.fr/en/itineraires or https://citymapper.com/paris?lang=en)
When boarding a RER B from Paris or airports, make sure it is headed for Saint-Rémy-lès-Chevreuses and not Robinson, Massy-Palaiseau or Orsay-Ville. Get off at the Gif-sur-Yvette station and follow our walking directions (10-15 minutes on foot).
Getting to Gif-sur-Yvette from Roissy Charles de Gaulle Airport (75 min)
By public transport: RER B from "Aeroport Charles de Gaulle" to " Gif sur Yvette"
By taxi: about 60 km from Roissy Airport
Getting to Gif-sur-Yvette from Orly Aiport (45min)
By public transport : Subway Orlyval at Orly airport to "Antony" then take RER B from "Antony" to " Gif-sur-Yvette
By taxi: about 27 km from Orly Airport
Getting to Gif-sur-Yvette from Massy TGV train station (15 min)
By public transport: RER B from "Massy Palaiseau" to " Gif sur Yvette"
Getting to Gif-sur-Yvette from "Gare du Nord" train station (Eurostar - Thalys) (50 min)
By public transport: RER B from "Massy Palaiseau" to " Gif sur Yvette"