I want to go to Massy Palaiseau from CDG airport by riding RER B at the same day.
Before I visit Massy Palaiseau I want to drop by Chatelet.
If I buy Mobilis can I ride RER B from Chatelet to Massy Palaiseau without paying extra fee?
Also could you please tell me zone number of CDG and Massy Palaiseau?
Moreover could you please tell me train time between Chatelet to Massy Palaiseau? If Chatelet is still on construction, could you please tell me train time between St Michel Notre Dame to Massy Palaiseau?
Thank you in advance.