I am going to be travelling into Paris. I land in CDG but am not sure of how to get to Paris (Gare du Nord). I am planning to buy a Navigo Decouverte with zones 1-2 loaded on. I also am travelling to Versailles and back. I have heard about Complement de Parcours and have seen that they give discounts on tickets. I am travelling in a group of four (me included) and I was wondering if I am better off getting the ND with zones 1-2 or zones 1-5?
What is a betterthe cheaper option, a Navigo Découverte zone 1-2 plus a complément de parcours to Versailles, or a Navigo Découverte zone 1-5?