Although not the most glamorous of the three CDG terminals T3 is probably the easiest to negotiate
After passport control, baggage reclamation and customs head for the the main exit (sortie).
You are heading for 'Aeroport Charles de Gaulle1' - the name however is a bit of a misnomer as it is actually the nameofthe train station at 'Roissypole', near Terminal 3, not Terminal 1. You are within walking distance (350 metres) of the train station, follow the signs, 'Paris par train / Paris by train'
As you leave the terminal turn right and continue along covered walkway. This will lead you to a pedestrian underpass (tunnel). It is equipped with surveillance cameras for your security. It will bring you out at a pedestrian crossing that takes you over Rue de New York and on to Rue d' Athenes which will ultimately lead you to the station.
It does feel a little unlike arriving at an 'International Airport' as you go through the underpass and over the road crossing but it is not log until you arrive at 'Roissypôle’.
‘Roissypôle’ is the name of the group of buildings made up of offices, airport hotels, the RER train station (Aeroport CDG1), the bus and coach station and the CDGVAL within the Paris-Charles de Gaulle Airport complex. See airport plan here.
When you arrive at the station continue following the signs 'Paris par train/Paris by train', this will take you to the ticket machines for the RER trains and in the direction of the station platforms.
You will find plenty of ticket vending machines here. You must use a 'smart chip enabled' card at these machines or cash - coins only!.**There are also ticket windows nearby - but these tend to be busy with people who can't use their card or did not bring any euros in change !!!. If you only have notes there are a few 'coin change ' machines-but again they tend to be busy - if you can find them ---the answer is to take a bunch of euro coins with you! Your ticket is valid for the journey to the centre of Paris This ticket is also good for a transfer from the RER to the local Metro system and an unlimited number of transfers once you are inside the Metro as long as you don't exit a metro station. The combined fare RER + OrlyVal should be around 22 euros
Once you have your ticket follow the signs saying "Access aux trains" or "All trains". When using the ticket from and to the airport (as with tickets for the RER trains and the metro) you have to use it to enter and to exit the train. Always keep the ticket handy as the SNCF guards sometimes check tickets and if you are without one you may be fined €40. This means that after you use your ticket at the entry gate, you must retrieve it from the machine and keep it with you until you leave the train/metro (it continues to work here ) system including any connections.This will lead you down an escalator to the train Platform.
The platform signs read 'Tous les trains vont à Paris' - all the trains serve Paris. When the the train arrives the doors should open automatically but if they don't just push on the rubber button to operate.
Take the RER train in the direction of 'Saint Remy les Chevreuse' B4 to 'Antony' station and from there ride the OrlyVal shuttle train to the airport.
Do not take trains marked B2 Robinson as they split away before 'Antony' station, although if you do find yourself on this, all is not lost as you can get off at 'Bourg-la-Reine', or any stop before it, and pick up the correct train.
Once you arrive at 'Antony' station the airport and OrlyVal shuttle are well signposted.
Remember arrows pointing down mean straight ahead.
The OrlyVal shuttle train stops at both Orly West (Ouest) terminal and Orly South (Sud) terminal where you make you way from the shuttle train to the terminals via short walkways.