Access options

From the Paris airports, Roissy Charles de Gaulle or Orly, IALA may be reached by taxi or by the RER train service. The price of the taxi journey Roissy Charles de Gaulle Airport – Saint Germain en Laye is approximately €80 and will take up to one hour.

• Access to IALA by RER train service

  Saint-Germain-en-Laye is served by Saint-Germain-en-Laye station on Paris RER (Regional Express Railway) line A. St Germain en Laye station is a western terminus of RER Line A, but Line A divides just West of central Paris, so make sure that the train you board is going to St Germain en Laye. Illuminated signs on the platform will indicate which stops the next train will make.

• From the Airport Roissy Charles de Gaulle by train

  Take RER Line B south (direction Saint Remy les Chevreuse). Get off at Chatelet les Halles. There, follow corresponding signs to RER line A1 direction Saint Germain en Laye. Once on the platform, check the destination boards to make sure that the train you are taking is going to St. Germain en Laye. Destinations appear on the boards just before the trains enter the station. Journey time Roissy Airport – Saint Germain en Laye is about 1h30.

• From Orly Airport Sud or Ouest terminal by train

  Walk or take the shuttle bus from the terminal to the Orlyval station. Buy a ticket to Saint Germain en Laye. Take the shuttle train from Orlyval station to Antony station on RER line B. Take the RER line B direction Aeroport Roissy Charles de Gaulle – Mitry Claye. Alight at Chatelet les Halles and follow corresponding signs to RER line A1, direction Saint Germain en Laye. Once on the platform, make sure you are taking the right direction by checking the destination boards. Destinations appear on the boards just before the trains enter the station. Journey time Orly Airport – Saint Germain en Laye is about 1 hour 30 minutes to 2 hours.

  At Orly aiport you can also buy your ticket at the information counter, where the attendant will direct you to the Orlyval shuttle station inside the airport.

• From the train stations in central Paris

  At Gare du Nord, follow the corresponding signs to RER Line B, direction Saint Remy les Chevreuse. Buy a ticket to Saint Germain en Laye. Take any train to Chatelet les Halles (one stop), where you should alight and follow the corresponding signs to RER line A1 Direction Saint Germain en Laye. Once on the platform, make sure you are taking the right train by checking the destination boards. Destinations appear on the boards just before the trains enter the station. Journey time Gare du Nord – Saint Germain en Laye is 35 – 40 minutes.

  At Gare de l’Est, buy a ticket to Germain en Laye. Take the Metro line 4 direction Porte d’Orléans. Alight at Chatelet les Halles and follow the corresponding signs to RER line A1 direction Saint Germain en Laye. Once on the platform, make sure
you are taking the right train by checking the destination boards just before the trains enter the station. 
Journey time Gare de l’Est – Saint Germain en Laye : 35 to 40 minutes.

  At Gare de Lyon, buy a ticket to Germain en Laye. Follow correspondence signs to RER line A1 direction Saint Germain en Laye. Once on the platform, make sure you are taking the right train by checking the destinations boards. Destinations appear on the boards just before the trains enter the station. Journey time Gare de Lyon – Saint Germain en Laye is 30 minutes.

• On arrival at RER Station St Germain en Laye

  The IALA offices are located in the Bel Air district of St Germain en Laye. This is about three km by car or two km by the most direct walking route from the RER station.

  At the station, taxis may be obtained outside the station or you can take the local bus R1 or R2 and stop at “Gaudines” bus stop. The bus station near the station is shown on a map at http://www.saintgermainenlaye.fr/en/cadre-de-vie/venir-circuler-et-stationner-a-saint-germain/rer-bus-voiture-taxis-liaisons-avec-les-aeroports/ Look for the coloured markers R1 and R2 to locate the bus terminus. The chateau is clearly shown on the map and will be visible to you the moment you emerge from the station, to assist you to get your bearings.

  It is also possible to walk to IALA from the RER station, and this will take 30 to 40 minutes. We recommend that you do not attempt this with a suitcase. Refer to the walking map.