I’m not sure if this website is updated. I’m looking for information about taking the bus from Orly to Montparnasse, and then from there the possibility of taking a taxi to our final destination Bologne Billancourt?? Please advise. Thank you!
The Orlybus airport bus from Orly Airport goes to Paris stopping at Denfert-Rochereau (the terminus and as close as you can get to Gare Montparnasse by direct public transport from Orly).
There is no dedicated taxi rank at this terminus that I remember of, but it's also quite a busy area and there are likely plenty of taxis to hail or Uber if you're into that. So you should be able to grab a car ride to Boulogne-Billancourt pretty easily from this area.