CÉLINE DION — RER A & E WORKS

Céline Dion opened a 16-show run at Plenitude Arena in Nanterre on Saturday 12 September. Current reporting and the official Île-de-France Mobilités event information say the series continues through 17 October 2026, with shows scheduled on Wednesdays, Fridays and Saturdays.

The arena is west of central Paris, beside the La Défense transport hub. Île-de-France Mobilités lists several normal public-transport options: Métro line 1 to La Défense / Grande Arche, RER A to La Défense / Grande Arche or Nanterre-Préfecture, RER E to La Défense or Nanterre-la-Folie, tram T2, Transilien lines L and U, plus more than 15 bus routes.

That normally gives concert-goers plenty of redundancy. The complication is that the concert run overlaps with several planned works packages. They do not all affect the same passengers, so a blanket “the RER is closed” warning would be misleading. The useful question is where you are travelling after the show.

The official RER E works calendar says that on Saturday 19 and Sunday 20 September, there will be no RER E trains between Nanterre-la-Folie and Villiers-sur-Marne for the entire day. Replacement buses are planned between Bondy and Villiers-sur-Marne, while service on the Tournan axis is reduced to one train in two between Tournan and Nanterre-la-Folie.

For concert-goers on Saturday 19 September, this matters because Nanterre-la-Folie is one of the stations promoted for Plenitude Arena. The affected section also covers the central Paris RER E corridor, so relying on the usual E-line route without checking the day’s planner could send you into a closure.

If you are starting in central Paris, Métro line 1 to La Défense is the most obvious alternative promoted by Île-de-France Mobilités. Transilien line L from Saint-Lazare to La Défense can also be practical depending on where you begin. From La Défense, the arena is reached on foot through the Jardins de l’Arche area.

From Monday 14 September through Friday 9 October inclusive, the RER A is interrupted on weekday evenings from 22:00 between Nanterre-Préfecture and the Cergy-le-Haut / Poissy branches. The line says the closure is required for rail-renewal work.

This distinction is important. If you are leaving the arena for a hotel in central Paris, the works do not mean that every RER A journey between La Défense and Paris is shut after 22:00. The published closure is west of Nanterre-Préfecture towards Cergy and Poissy. Travellers continuing to those western branches are the people who need the biggest buffer.

The official RER A guidance sends Houilles–Carrières-sur-Seine and Sartrouville passengers to Transilien line L from Paris Saint-Lazare. For Maisons-Laffitte through Neuville-Université, and for Cergy stations, replacement buses operate from Nanterre-Université. The operator warns that the bus alternatives can add substantial time: roughly 30 minutes to Poissy, 45 minutes on the semi-direct Cergy replacement, and up to 60 minutes on the omnibus Cergy route.

That is the kind of delay that matters after a concert. Do not plan a tight last connection farther west on the assumption that a normal post-show RER A will still be running.

Île-de-France Mobilités is explicitly steering concert visitors towards a multi-line approach. If one route is affected, the strongest alternatives around La Défense include:

• Métro 1: La Défense / Grande Arche — useful for central Paris and unaffected by the specific RER A west-branch closure.
• Transilien L: La Défense to Paris Saint-Lazare — especially useful when RER E is disrupted or for passengers connecting towards the western suburbs.
• Transilien U: La Défense for passengers whose onward route fits the line.
• Tram T2: La Défense, with onward connections across the western inner suburbs.
• Bus: more than 15 routes serve La Défense and the arena area, although post-concert crowding and road conditions can make buses slower than a normal rail journey.

The event transport page says staff are being deployed around line 1 and the RER A and E stations to help guide concert-goers. Follow the live signs rather than forcing the route you saved before the works were updated.

The RER E works calendar continues beyond this weekend. From 26 September to 1 November on weekends, the operator lists no train service between Nanterre-la-Folie and Tournan. That does not mean every RER E route into Nanterre is unavailable — the network has multiple branches — but it can change which trains run through central Paris and how often.

The RER A weekday evening closure towards Cergy and Poissy continues through Friday 9 October. Because the concert series runs until 17 October, different shows intersect with different work packages. A route that is fine on one Saturday is not automatically the best route the following Wednesday.

That is why the practical advice is deliberately boring: use the official journey planner for your exact origin, destination and date. Screenshots of a transport map taken weeks earlier are not enough during a works-heavy month.

For most visitors staying in central Paris, a sensible concert-night plan is to arrive early via whichever of line 1, RER A, RER E, L or U the live planner recommends, then check the return trip again before the show starts. If the E is closed, make La Défense and line 1 your default mental fallback rather than waiting until 40,000 people are trying to leave at once.

If your final destination is Cergy, Poissy or another station on the affected western RER A branches, check the last practical rail connection and the replacement-bus departure points before the concert. The operator’s published extra journey times mean “I’ll work it out after the encore” can turn into a very long night.

Allow extra walking time too. La Défense is a large interchange with multiple levels, exits and construction diversions, and a stadium-scale crowd magnifies small navigation mistakes. The official event signs and staff are there for a reason.

Finally, transport works can change at short notice. Recheck the Île-de-France Mobilités or Transilien journey planner on the day, and follow station announcements if they conflict with this article.

Totally Paris checked the current event and transport information against:

• Île-de-France Mobilités — Céline Dion concert transport and access options
• RER A official line site — 14 September to 9 October evening works
• Transilien RER E — August/September 2026 works calendar
• Le Parisien — concert schedule and disruption reporting, 15 September 2026

Verification note: dates and closure sections above reflect the published information checked on 16 September 2026. Rail works and operating plans can change, so the official journey planner on the day should always beat a static article.