Does anyone know how often the trains run between Paris and Versailles as well as Versailles back to Paris?
Is there a website that lists the times and places of departure?
Thanks
Use the RATP website at https://www.ratp.fr/en
Or the Citymapper website (and app) at https://citymapper.com/go/chateauversailles
The Versailles website also provides different modes of transportation such as train/bus.
https://en.chateauversailles.fr/plan-your-visit/practical-information#getting-to-the-palace
This is public commuter transport -- they run about every 15 minutes or so in our experience.
You can also just dump a starting and ending point into Google Maps...
“Is there a website that lists the times and places of departure?”
https://www.transilien.com/en/page-lignes/ligne-c
Read what the Man in Seat 61 has to say about Versailles, he has several options.
As does Rick in his guidebook, which you probably already have (hint).