Getting to Central Paris from the Airport
From Roissy Charles de Gaulle Airport
This is the main Paris airport; flights from America will arrive here.
By taxi: ~50 euros.
By rail: ~8.40 euros. From terminal 2, follow the signs to
the RER (regional rail) station. From terminal 1, take the free CDGVAL tram to
the 'Roissypole' or 'Terminal 2 Gare' station.
You will need to buy a ticket from the ticket counter unless you
have a European credit card or lots of euro coins. The train takes ~45 minutes
to central Paris where you can connect to the metro system. Saint-Michel/Notre
Dame is the stop nearest the workshop locations. Keep your ticket since you
will need it to get out of the system when you arrive.
[Detailed
Instructions]
By bus: Air France runs a bus "les cars" from the airport to central Paris for ~16 euros. Take line 4 to Gare de Lyon or Gare Montparnasse, from which you can walk, catch a taxi, or take the metro to your final destination.
From Orly Airport
Many discount airlines within Europe use this airport.
You can catch either the OrlyBus to Denfert-Rochereau (~6.40 euros) to connect to the metro system, or take the OrlyVal shuttle to the RER B train to central Paris (slightly faster, costs slightly more). Air France and other private companies also run shuttle buses which may be of interest if they are going to near your hotel.
Getting between LPNHE and APC
Each day will be entirely at LPNHE or entirely at APC, but if you want to go directly between them, you can use bus 89 or walk ~30 minutes along the Seine.