It seems there are 2 ways to get to the above where we are going to stay. I think one goes via the TGV and the other via RER B and Paris. Which is best and how do I buy a TGV ticket - at the airport? Many thanks. Ps I am buying a phone ticket for zone 1-5 Navajo
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I'm not aware of any TGV train service at Bry-sur-Marne. I only know of an RER A train station there.
To travel from CDG Airport to Bry-sur-Marne take the RER B train from CDG to Chatelet les Halles, then transfer to RER A direction to Marne la Vallée / Chessy until Bry-sur-Marne.