How long is the RER ride from Versailles into Paris around the Arc de Triomphe?
According to the Paris transportation route planner, the fastest routing would take about 45 minutes, including a combination of the RER and Metro. But that would depend on exactly when you're travelling. You can enter specific dates and times in the planner and get the fastest routing. Use "Versailles-Rive Gauche" as your departure station, and "Charles de Gaulle-Etoile" as your arrival station, and you'll be there!