We [group of 4] will be arriving at CDG on a Friday via an Air France flight from Nice [ETA 9:30am]. If we use the RER B and RER E lines to get to Gare Saint-Lazare, can we reasonably expect to buy the tickets and make the journey in time to catch a 12:10pm train to Bayeux? /Thanks

You will have plenty of time. You are arriving on a domestic flight so you don't have to worry about a long line at immigrations. The actual time on the RER B and RER E is only about 35 minutes.

"Buy the tickets" is probably the only bottleneck here. Sometimes the queues at both CDG and St-L get pretty fierce, although 10:00 will probably miss their usual early-morning peak. If you pre-order your tickets from Paris to Bayeux, you can retrieve them from a machine if you bought them with a chipped credit card.

But you'll still have plenty of time if your flight isn't awfully tardy.

Order a ticket "to Paris" and both legs will be covered. If you're returning to CDG via the reverse route, order a <I>carnet</i> of ten and you'll get two free tickets for future use.

Thanks for your input.
If we purchase the carnet of 10 (Paris - airport) tickets, how long will the 2 extra tickets be valid?
If I use SNCF's website to pre-book the tickets, can I pick them up at the train station in Nice?

/Thanks

The extra two tickets are valid indefinitely. The other option here is to have enough euro coins to buy 4 tickets from an automated machine at CDG. That way you end up skipping any potential lines at both locations.

Yeah you could pick up the tickets in Nice or wait to buy them in Nice. I would have the tickets before you get to Paris.

Thanks for the advise.

Our plan now is to pre-book and hope SNCF's website offers us the homeprint option. If not, then we'll definitely pick up the tickets in Nice before heading to Paris. With regards to the RER tickets, we're going to let the line at the CDG ticket office determine whether we buy the carnet of 10 or use the ticket machines.

Thanks to both of you for your feedback.