Flights to Paris and back are booked.

I'll land there at 11:10 on Friday.
As I don't know how long it will take to get out of the airport and on to Gare Montparnasse, I can't say at what time I will arrive at Niort ...

==> Richard, if you could send me your mobile number (by PM) ...

The flight back is on Monday evening, so there is plenty of time to get back to Paris ...

Btw, that "Clickable Map" way up in this thread leads to an error page ...