How do I get from CDG to Deauville, France by train
Take the RER B from CDG to Gare du Nord. Transfer to the RER E at Magenta (attached to Gare du Nord) and take it to Haussmann-St Lazare. Walk to Gare St-Lazare. Take a train (or trains) from Gare St-Lazare to Trouville-Deauville. Depending upon your departure time, some trains are direct and some require a connection in Lisieux.