Flying out Tuesday early morning via Munich, arriving at CDG around 11. From CDG straight to Montparnasse by RER and Metro, meeting up with William there, taking the 13:45-ish TGV to Le Mans, disembarking around 14:40, then on the tram and trackside by 15:30 Tuesday at the latest.
Then unpacking and dashing off to the autograph session in the paddock.