to go from CDG to gare de lyon on the RER I need to transfer. do I need a new ticket?
1 answer
You can use the same RER ticket for transfers within central Paris Zone 1.
Taking a train from CDG to Paris Gare de Lyon, use the same ticket when transferring at Gare du Nord to a RER D train heading in direction "Melun" which stops at Gare de Lyon, about 8 minutes after leaving Gare du Nord on the RER D train.