Can anyone help we need to get to puteaux from Orly airport as cheap as possible would be very grateful for any advise
You can use the journey planner on the Transilien site to work out which transport option would be best for you.
Looking at it quickly, they list a few options. Using the OrlyBus method will cost about 9.50€ (7€ to Denfert-Rochereau, 2.50€ to Puteaux), using the combination of Orlyval, RER and tram should be around 13.10€. You can double check ticket prices here: