Here in Indiana, I booked two tickets from CDG to Lyon last night. Didn't have any problems, other than the J30 was not available for the train I wanted, so I had to take a J8. Oh well, I still saved about 80 euros.

I know this post has been some times back. But a couple of question here:<BR>1) Do we need to book the tickets in advance? (we are going to the same route Paris to Rennes)<BR>2) If yes, how early do we need to book? <BR>Thanks