We had intended to easily travel to Versailles on RER C in late September, however, the Paris Metro website " www.ratp.fr/en " shows that the RER C is not functioning. Our start point is St Michel. Is this true, or a website glitch?
It’s not that the RER C is not working — it’s that it is not running from your particular stop. The site usually offers you an alternative: Line 10 to Javel-Andre-Citroen stop and walk to the Javel stop on the RER C and get the train there. If it does not offer you that alternative, it will offer something because there are lots of ways to get to Versailles from Paris.
In the past decade plus visiting Paris it seems like the C is rarely running in central Paris -- there are the floods, then the track work -- every time we have wanted to go out of town to Versailles or further we have had to board the C at Javel and sometimes this year, it wasn't even running there but people had to take other trains to less convenient stations in Versailles. So yes -- if they say it isn't running at St. Michel trust that. See if it is running at Javel -- you can then take the metro and transfer there.
There is work on the line just about every weekend and late nights these days. However, I am not seeing any complete closures on weekdays. Check again once you're there; perhaps the time difference is messing things up when you make your route inquiry.
In any case, if the RER C is not an option even at Javel, the train from Montparnasse to Versailles-Chantiers is fast and almost makes up for the extra distance to the palace.
Thank you for your experienced responses.