Reply from Paris Digest, France
11:39 March 16, 2010
How much time would you need to go from Charles de Gaulle airport to the Eiffel Tower, visit the Eiffel Tower, then get back to Charles de Gaulle airport? To be very safe, I would count 90 minutes by metro one way, including waiting and walking time, 60 minutes to visit the Eiffel Tower. Altogether 4 hours. To that, you have to add the time to get out of the plane, pass the customs, then check in time on the way back. I would count altogether 6 hours between planes to be safe.