After our stay in Sarlat, we will drop our rental car off in Brive la Gaillarde, then take the direct train to Paris. Our international flight departs the next day at 10 AM from CDG airport.
After we arrive in Paris does it make more sense to overnight in Paris and take an early AM taxi to the airport.....or... once we've arrived in Paris (at the Austerlitz train station) take a taxi to the Gare du Nord train station, and then take a train to the airport..and then a taxi to an airport hotel? There are many trains going to the CDG airport from Gare du Nord train stn. Trains out of Austerlitz only go to Orly.