Rer B

The Rer B connects Airport Charles de Gaulle 2- Mitry-Claye (north-east) to Robinson- Saint-Rémy-lés-Chevreuse (south) through Paris. The rer train has other terminus because all the trains don't stop at those 4 terminus but may have their own terminus.

Above is the Rer B map (that you can find also in the Paris rer map section):




It gathers 47 stations whose 7 of them in Paris (zone 1).
Those 7 stations are Gare du Nord, Châtelet-les-Halles, Saint-Michel-Notre-Dame, Luxembourg, Port-Royal, Denfert-Rochereau, Cité Universitaire. Beyond those stations, you can't use your ticket t+.

The first departures of the Rer B occurs around 4:50am.
In rush hours, you may have trains every 3 minutes (the 2 ways), on the common branch, however you can have trains every 30 minutes late the evening and depending on the branch.

As other Paris rer, you have also trains which skip some stations, so be careful to watch the screens on the station to have more information.

At Gare du nord, there is a connection with the rer D and the rer E.
At Antony station, there is a connection with the Orlyval, the shuttle which goes to Orly airport. Furthermore, one of the rer B terminus is Charles de Gaulle airport 2 (stops also at the terminal 1).