Changes

Take Transilien J or RER A from Paris and get off at Poissy. Take bus 20 to bus stop Auberg. There's one bus every hour on weekdays, fewer than that on Saturdays and it doesn't run on Sundays.

There are 3 main airports that service Paris. Charles de Gaulle (CDG), Orly, and Beauvais. It is possible to hitch from the airports into the city, but to get from Paris to the airports, Blablacar is probably the most reliable option.