Originally Posted by
doglover
Getting to a metro station will be cheapest. I took the train to Saint Lazare from Becon-les-Bruyeres and the fare was 2.60 euros.
In 9 days in Paris my wife and I will go thru 4 carnets. The cost of a 9 day pass for 2 people would be nearly double. It really depends on how often you plan to ride.
For 9 days, it would probably be easier to buy a zone 1-2 Navigo for one week (around 21EUR each, if I remember correctly + a one-time 5EUR for the card itself) and then a carnet for the extra two days. That would cost you about the same but gives increased convenience. Might even be a few EUR cheaper.