Does this all in one ticket include the roundtrip tickets from CDG to Paris and Paris to CDG? We arrive on Monday and go back to CDG the following Saturday. It would be ideal and I feel like it will save on costs. Thank you. Suzanne
Navigo Découverte card with a week pass on it covers trains between CDG and Paris (RER B train). It also covers the Roissybus CDG airport bus (between Paris Opera and CDG) if you prefer road travel.
Your Monday to Saturday travel schedule is perfect for the Navigo card and is definitely the best option for you providing the best coverage, easiest use and cheapest cost. You can buy those passes at CDG Airport train stations. Please see the Navigo card and CDG Airport Train articles for details.