I have been to Paris many times and taken both the train and sometimes a taxi from CDG to Ecole Militaire. Our adult son is coming with us on this trip and wishes to use the train. Since it has been awhile, I thought perhaps I would get a few tips from you all which I have. Thanks so much.

I took the Roissy bus to the Opera area and jumped on the Metro that went to Ecole Militaire stop. Easy and less fo a headache than the RER version.

What kind of headache do you find with the RER? According to the RATP site, the RER B - Bus 82 is the fastest, has the fewest connections, and the least walking of any route.

The Roissybus also costs €8.30 and doesn't even get you to your destination. Assuming you'll want to move around for the rest of the day, a Zone 1-5 Mobilis only costs €6.80 for the airport leg plus gets you anywhere in town (even out to Versailles).

Oops.

It says right on the Mobilis that it's invalid for CDG (although I don't know why buying Mobilis for Zone 1-2 and a ticket from CDG to Zone 2 wouldn't work).

I'm with tmh -- it's the Roissy bus to Opera and then line 8, direction Balard to Ecole Militaire. Your luggage is stowed on the bus. then you only have to make it down the stairs at the Opera metro station. At Ecole M. if you pick the right exit there is an escalator.

Excellent suggestion and I have checked it out on the airport web site. I am considering it as well.

One consideration in taking the train is that my son must make his way back to the airport by himself when he leaves Paris and wants to take the train. I just thought that if we took it into Paris, he wouldn't have any problems taking it back to the airport. I'm sure I am worrying too much but you know, once a mother always a mother ;)

The best part of the RER from CDG is the view of Sacre Coeur as you approach the city. Otherwise it's pretty boring. Maybe if you take the bus in he'll decide he likes that? I'm sure you'll take the RER while you are in Paris so he can get a feel for it then if he still wants to take it.

I just had a good laugh. I searched for the terms "cdg ecole" and got no fewer than 22 threads about how to get from the airport to Ecole Militaire.

I guess ever since Rick Steves invented rue Cler, there's been increased tourist traffic along that route. ;)

About the only one we haven't covered is hitchhiking.