At a glance

Main terminals Nanterre – La Folie / Chelles – Gournay, Tournan
Ticket inside Paris 1 Métro-Train-RER ticket (2.55 EUR); specific fare outside Paris
Official map ratp.fr/plan-metro

The key stations, in order

→ Nanterre – La Folie (Éole)

→ Chelles – Gournay / Tournan

Connections: numbers are metro lines, T = tram, RER = RER lines, TGV/TER/Transilien = trains.

Not to miss

It is the direct way to link the department stores on boulevard Haussmann (Haussmann – Saint-Lazare) to La Défense in a few minutes, or to go from Saint-Lazare to Magenta with no change. At Magenta, passages lead to Gare du Nord and Gare de l'Est.

Hours and tickets

RER trains run roughly from 5:00 to midnight, with differences by line and branch (last trains often between 23:30 and 0:30): check the branch timetable on ratp.fr or iledefrance-mobilites.fr. Inside Paris the 2.55 EUR Métro-Train-RER ticket is enough. For an airport, Disneyland, Versailles, Chantilly or a distant station you need an origin-destination ticket at the zone fare: check today's price on iledefrance-mobilites.fr and keep the ticket until you exit.

Works and disruptions in 2026

I found no closure announced for RER E in November 2026: RATP refers to Île-de-France Mobilités for lines C, D and E. Check weekends before you travel.

Tips

The Éole extension to Mantes-la-Jolie, announced for 2026, has slipped: one press source says early 2027 for partial service (not officially confirmed); do not count on it. Check the display: some eastern trains do not go to Nanterre – La Folie.

Official map

The official metro, RER and tram map can be downloaded free at ratp.fr/plan-metro (PDF and interactive map). We do not reproduce the map: it belongs to RATP and Île-de-France Mobilités.

Go further

Other lines

Line 1 · Line 4 · Line 6 · Line 7 · Line 8 · Line 9 · Line 12 · Line 13 · Line 14 · RER A · RER B · RER C · RER D

Sources: RATP (ratp.fr, works and timetables), Île-de-France Mobilités, local press for the summer 2026 works. Checked on 26 October 2026.