We need to get from Disney land Paris to Grand Palais, then we will be in Paris for 3 days
1 answer
If the start of your travels begins anywhere between Monday and Thursday, the Navigo Découverte pass is the easiest option and will cover you for everything in Paris, including Disneyland Paris.
If arriving on Friday/Saturday/Sunday you may want to look at Paris Visite 1-3 zone for a multi-day pass. It won't work for Disneyland Paris, but you can purchase a single-use RER ticket for that trip.