RER B
running late?
Live traffic and next trains on the RER B (Aéroport Charles de Gaulle 2 (Terminal 2) ↔ Orsay - Ville).
🔄 Updated at 03:44
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RER B: normal traffic right now.
🧭 Work out a metro / RER journey time
RER B delays: is the line disrupted?
This page checks live whether the RER B (RER B, from Aéroport Charles de Gaulle 2 (Terminal 2) to Orsay - Ville) has a delay, breakdown or disruption: passenger incident, engineering works, signal failure, traffic regulation… The status and message come from Île-de-France Mobilités' real-time traffic info, not from an estimate. Pick your station to see the next RER in each direction.
👉 See also every disrupted line, live.
RER B: the essentials
- 🚉 47 stations, from Aéroport Charles de Gaulle 2 (Terminal 2) to Orsay - Ville.
- 🔀 Termini: Mitry - Claye, Robinson, Saint-Rémy-lès-Chevreuse, Aéroport Charles de Gaulle 2 (Terminal 2), Massy - Palaiseau, Orsay - Ville, La Plaine Stade de France, Aulnay-sous-Bois.
- ⏱ End-to-end journey: ≈ 89 min.
- 🔁 An RER every ~4 min during the day (weekdays).
- 🕐 On weekdays, first departure around 04:50, last around 01:05 (planned timetable).
- 📍 Towns served: Le Mesnil-Amelot, Tremblay-en-France, Villepinte, Sevran, Aulnay-sous-Bois, Le Blanc-Mesnil, Drancy, Le Bourget, La Courneuve, Saint-Denis, Paris, Gentilly…
Connections
Stations on the RER B: next trains
- Aéroport Charles de Gaulle 2 (Terminal 2)
- Aéroport CDG 1 (Terminal 3) - RER
- Parc des Expositions
- Villepinte
- Sevran - Beaudottes
- Aulnay-sous-Bois
- Le Blanc-Mesnil
- Drancy
- Le Bourget
- La Courneuve - Aubervilliers
- La Plaine Stade de France
- Gare du Nord
- Châtelet - Les Halles
- Saint-Michel Notre-Dame
- Luxembourg
- Port Royal
- Denfert-Rochereau
- Cité Universitaire
- Gentilly
- Laplace
- Arcueil - Cachan
- Bagneux
- Bourg-la-Reine
- La Croix de Berny
- Antony
- Fontaine Michalon
- Les Baconnets
- Massy - Palaiseau
- Palaiseau
- Palaiseau - Villebon
- Lozère
- Le Guichet
- Orsay - Ville
- Sevran - Livry
- Vert-Galant
- Villeparisis - Mitry-le-Neuf
- Mitry - Claye
- Sceaux
- Fontenay-aux-Roses
- Robinson
- Bures-sur-Yvette
- La Hacquinière
- Gif-sur-Yvette
- Courcelle-sur-Yvette
- Saint-Rémy-lès-Chevreuse
- Parc de Sceaux
- Massy - Verrières
Frequently asked questions — RER B
How can I tell if the RER B is delayed?
Open this page: the live status of the RER B appears straight away, based on Île-de-France Mobilités' official traffic info (“IT'S A MESS” when it's disrupted, with the reason and the announced end time, “ALL GOOD” otherwise). Then pick your station for the next trains.
When is the next RER on the RER B?
Pick your station: the next trains appear in real time in each direction (towards Mitry - Claye, Robinson, Saint-Rémy-lès-Chevreuse, Aéroport Charles de Gaulle 2 (Terminal 2)), refreshed every 30 seconds.
What time is the first and last RER on the RER B?
According to the planned timetable, on weekdays the first RER leaves at 04:50 from Aéroport Charles de Gaulle 2 (Terminal 2) and at 05:07 from Orsay - Ville; the last leaves at 22:49 from Aéroport Charles de Gaulle 2 (Terminal 2) and at 01:05 from Orsay - Ville. For your station, ask the AI: “last RER from …”.
How long does it take from Aéroport Charles de Gaulle 2 (Terminal 2) to Orsay - Ville?
About 89 minutes end to end on the RER B (47 stations), based on official IDFM timetables. For a specific trip between two stations, use the journey time calculator.
How often does the RER B run?
During the day on weekdays, an RER comes every 4 minutes on average on the central section (less often on the branches). The actual next trains are shown on this page.
Is the RER B often disrupted?
Like any line on the network, the RER B has its share of incidents, engineering works and traffic regulation. This page shows the actual status right now (updated continuously), not an average.