Bus 9517

Last Ryanair into T3 at 23:30 and still need Roissy?

Bus 9517 is one of the few late options linking CDG with parts of the Roissy area and nearby suburbs when the regular RER B and daytime RATP buses thin out. The scheduled trip runs around 60 minutes, so think of it as a slow, hyper‑local link rather than an airport express. It mainly serves staff zones and specific business parks around Roissy, not central Paris.

You board Bus 9517 from the CDG side serving Terminals 1, 2, and 3, with many users coming straight out of low‑cost arrivals at Terminal 3. Exact stops can change by contract and timetable, and that patchiness is why even frequent‑flyer blogs that go deep on Roissybus, 350, and 351 barely mention 9517. Check the current stop list on an Île‑de‑France transit app before betting your night on it.

In practice, Bus 9517 functions closer to a navette for specific zones than a tourist line. French transit forums group it with other 95xx routes tied to companies around CDG, so the stop names may line up with warehouses, hotels, or office parks instead of familiar neighborhood names. That is useful if your bed is in Roissy‑en‑France or a nearby business park, and useless if you are aiming for Châtelet or Gare du Nord.

Locals on r/paris and r/travel usually push arrivals toward Roissybus or the RATP 350/351 for Paris intra‑muros and only mention 9517 when someone has a very specific Roissy‑area address. That tells you a lot about how niche this bus is. If you are chasing a low fare at an airport hotel in the Roissy zone, though, this is exactly the kind of staff‑heavy bus line that can drop you closer than the train.

Step-by-step: using Bus 9517 from CDG

• 1. On Wi‑Fi at CDG, open a transit app and confirm the next Bus 9517 departure and its full stop list.
• 2. Walk from your arrival hall in Terminal 1, 2, or 3 to the bus stations signed for local buses (look for the 95xx stand).
• 3. Check the front of the bus for the 9517 route number and final destination before boarding.
• 4. Buy a ticket from the driver or validator if required; budget for a standard suburban fare rather than an RER‑level price.
• 5. Track progress on your phone GPS and ring the stop button one stop before your Roissy‑area destination.

Tip: if you cannot clearly match a Bus 9517 stop name to your hotel or address within 5 minutes of checking the map, skip it and use Roissybus, 350/351, or a taxi instead.