Both Orly and CDG airports are serviced by RER B (blue on the map). From Orly you have to take the monorail to get to the Antony station; CDG has direct service. When in RER B, exit the train at Chatelet-Les Halles (some RER trains do not stop at every station but all trains will stop there). At Chatelet-Les Halles connect to RER A direction Cergy - Poissy - Saint-Germain en Laye (red on the map, going west). Exit RER A at the Charles de Gaulle Etoile station (do not confuse with Charles de Gaulle airport). It's the second stop from Chatelet-Les Halles. At Etoile connect to Metro line 1 direction La Defense (yellow on the map). Exit Metro Line 1 at Porte Maillot. It's the second stop from Etoile. As an alternative note that you can connect to Metro line 1 at Chatelet-Les Halles directly from RER B, but the connection tunnel is 1/2 mile long and 1 mile when you're in a rush :-) and there are 9 stops. Michel. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf