Most foreign participants will arrive at the Roissy Charles De Gaulle International Airport although some of them may arrive at the Orly Airport or in one of the Paris Train Stations.
From Roissy CDG (by public transportation) :
Public transportation to the city of Paris is provided by the RER B (express train service). To reach the Roissy RER station, take the special airport shuttle from the terminals.
With one connection : take the RER B going to Paris until Luxembourg Station. It will take 45 minutes to get there.
Fares : combined ticket to Paris (RER-Métro) : 7.60 euros.
Frequency every 15 minutes, two trains every 15 minutes during rush hours (From Saturday to Sunday : 7 am - 9 pm).
From Orly (by public transportation) :
Take the Orlyval (Automatic rail link connecting to RER line B) to Antony station. Then take the RER B going to Paris until Luxembourg station. It will take 45 minutes to get there.
Fares : combined ticket Paris (Orlyval-RER-Métro) : 8.75 euros, to be purchased at the Orlyval gate at the airport.
The following map shows the schematic path to go from the airports and train stations to the "Carré Des Sciences" (former site of Ecole Polytechnique) area, which is close to the Luxembourg RER-B train station.
![RER Plan](images/plan_rer.jpg)