RER B was created in 1977.
RER A was created in 1977.
RER C was created in 1979.
RER D was created in 1987.
RER E was created in 1999.
Auber - Paris RER - was created in 1971.
Champigny - Paris RER - was created in 1859.
Joinville-le-Pont - Paris RER - was created in 1859.
Épinay-sur-Seine - Paris RER - was created in 1908.
To travel from Paris Metro to CDG airport, you can take the RER B train line from any Metro station that connects to the RER B line. The RER B train goes directly to CDG airport, with several stops along the way. Just follow the signs for RER B at the Metro station and purchase a ticket before boarding the train.
The RER or reseau express regional has5 lines, A, B, C, D and E. They plan to expand E westward by 2020.
Gare RER de Saint Germain-en-Laye was created in 1847.
The hotel is near the RER station Val d'Europe. You need to take the RER and change at Chatelet-les-Halles. The RER station at Gare du Nord is below the suburban platforms in the main station. Follow signs for RER B. - When your RER B train arrives at Châtelet-Les-Halles, just walk across the platform to the other side and wait for an RER A train to Marne-La-Vallée-Chessy. Get off at Val d'Europe. It's a 3-minute walk to the hotel, and there's a map on http://www.relais-spa.com/valdeurope/en/where-we-are.