If you want to reach Paris Orly (ORY) airport by the Orlybus you first have to make your way to the Denfert Rochereau RER station. This can be done by using the RER itself or the metro system within the city.
The Denfert RochereauRER station is on the RERB line (B2 or B4) so this will also get you there
B line has hubs at Gare du Nord, Chatelet and St. Michel and runs south to Robinson on the B2 line and to Saint Remy sur Chevreuse on the B4 line. Both these lines will take you directly to Denfert Rochereau where you can catch the
Orlybus to the airport.
See RER map here...
Note: You can use line B to get you directly to station 'Antony' where you can catch the
Orlyval light train to the airport but you must use the B4 line.
There are also two metro lines you can take, line 4 in the direction of Porte d'Orléans or line 6 in the direction of Nation. Both these lines will take you directly to Denfert Rochereau where you can catch the Orlybus to the airport.
At Denfert Rochereau metro station your exits (sortie) and the way to the Orlybus are well signposted.
The Orlybus shuttle service to the airport leaves from Place Denfert Rochereau just outside the station to connect you to both terminals at Orly airport (South & West).The journey time is 30 minutes on average and they leave every 15 to 20 minutes. The buses operate from 5:45 am until after 11:00 pm seven days per week*. The service is operated by the transport company RATP
You can buy your ticket
(€ 7.00) directly from the driver on the bus or from the ticket machines in front of the station..
There is no 'hold' on the bus so you have to take your luggage onboard and space for stacking luggage is at a premium. So if you have a lot of luggage this may not be your best option.
The Orlybus stops at both terminals at Paris Orly airport, South (Sud) and West (Ouest).