Train · RER B line, Île-de-France Mobilités network (RATP / SNCF)
RER B
- Route
- Aéroport CDG 1 station (Terminals 1 and 3, Roissypôle) and Aéroport CDG 2 station (Terminal 2, TGV station) to Gare du Nord, Châtelet-Les Halles and other Paris RER B stations
- Journey time
- 30–45 min
- How the time is measured
- RATP: '30 à 45 min depuis le centre de Paris'. Other official figures differ: RATP RER page 'environ 30 minutes', Transilien '35 minute trip', IDFM (page first published 2023) 'between 25 and 30 minutes'.
- Fare
- €14
- Fare details
- Ticket Paris Région <> Aéroports: 14 € full fare, 7 € reduced fare (rates from 1 January 2026). Valid on any metro/RER/train journey to/from the airport, all zones, with metro and RER connections for 2 hours from first validation, so RER B plus a metro connection costs one ticket. Not valid on buses, Noctilien or trams. Sold on a Navigo Easy pass or smartphone (IDFM app), not as a cardboard ticket. Navigo monthly or annual passes that cover the airport zone need no extra ticket.
- Hours
- Approximately 4:50 a.m. to midnight, both directions (IDFM, 2026)
- Frequency
- Every 6 to 15 minutes in both directions (IDFM, 2026)
- Good to know
- IDFM's main recommendation now that Roissybus has stopped (Roissybus ended for good on 1 March 2026). At the airport, the free CDGVAL shuttle links Terminal 1, Roissypôle/Terminal 3 and Terminal 2 every 4 minutes, 4:00 a.m. to 1:00 a.m. Some RATP pages still show old fares (11,45 €, 13 €); 14 € is the current IDFM price. CDG Express, a direct train to Gare de l’Est, is due to open on 28 March 2027 according to its official site; it is not running yet.
Verified on: Île-de-France Mobilités · Île-de-France Mobilités · Île-de-France Mobilités · Île-de-France Mobilités · RATP (Bonjour RATP) · RATP (Bonjour RATP) · Transilien (SNCF, Île-de-France Mobilités network) · CDG Express