Please advise which would be the best option based on our time (2 adults) in Paris. I am having difficulty determining which is the best option. At first, the Decouverte seems to be, since it works with CDG and Disneyland. But given that it runs Mon-Sun, I would need to purchase two.
Arrive Thursday morning into CDG. In Paris, Thursday, Friday, Saturday, Sunday, Monday. Depart Monday for two days in Colmar. Return to Paris Wednesday afternoon. Thursday in Paris, Friday to Disneyland. Saturday in Paris, depart Sunday 2pm CDG.
This may help--there's a discussion if you scroll down about when it makes sense to buy.
https://parisbytrain.com/paris-train-metro-week-pass-navigo-decouverte/
Loaded with 10 carnets, the Navigo Easy came to 35 euros each. Our problem was with a machine purchase, luckily Ecole Militaire Metro has an attendant with a smile. We could reload the card easily enough.
Purchasing and configuring a Navigo Découverte card (5€) and loading it twice with a weekly, zone 1-5 fare (30€) should work well for you. Note that weekly passes for the current week may only be purchased through Thursday. Don’t forget to load your ND cards the day you arrive in Paris, Thursday, then loading it again the next day, Friday (or later) which will cover you transportation needs for the next week (Monday to Sunday).
A Navigo Easy loaded with 10 carnets (I.e. 100 tickets) would be way more than 35 euros. The card is 2 euros, and each set of 10 tickets is 14.90.
14.90€ per carnet x 10 carnets = 149.10 euros plus 2 euros for the card = 151.10 euros.
Although I can't imagine buying 10 carnets (100 tickets) if I were just coming for a few days !!!
A ¨carnet" is not a ticket. A carnet is 10 tickets which could be 10 tickets t+ or it could equally be 10 tickets origin-destination or RER tickets. There is no longer a discount over the 2.10€ per ticket price when purchasing 10 unless you purchase 10 electronic tickets t+ (16.90€) and load them onto either a Navigo easy or onto an Android phone using either the Bonjour RATP app or the Île-de-France Mobilité app.