Originally Posted by
GuillaumeD
You can also catch a TGV at Massy-TGV.
From ORY, there is a direct bus to the station. The TGV frequency is less than at Gare Montparnasse, but I think it is easier to go to Massy-TGV.
Orly access
Line 91.10 frequency: 30 min at peak hours - 1h off peak.
Or take the ADP shuttle to RER C station "Pont de Rungis-Aéroport d'Orly" and catch a train to Massy-Palaiseau. The TGV station is there.
Or take OrlyVal to Antony and RER B to Massy-Palaiseau if you miss the bus. There's an RER B from Antony to Massy-Palaiseau every 8mn at off-peak times, every 4mn at peak times
- 6mn ride on OrlyVal
- take the escalator up at Antony
- 4 to 8mn maximum wait at Antony
- 5-8mn ride to Massy-Palaiseau depending on whether the RER stops at each station
- 4mn walk from Massy-Palaiseau to Massy-TGV (stairs involved, escalators not in service yet)