RER NOTE20

RER

PoissyBoissy-Saint-Léger

Passages not confirmedTimes reported by the data source. Passages are not confirmed.

Historical average delay — home ranking

+2 min

Average of available delays per run over the 30 days before calculation, with equal weight for each eligible run. This is not the current delay.

Runs used: 4. Calculated on: 9/11/2026, 1:00:25 AM (Europe/Paris).

This average can be available without a complete route. The route statistics below use only recorded routes with their stops.

Calculation window: 8/12/2026, 1:00:25 AM – 9/11/2026, 1:00:25 AM (Europe/Paris).

Runs in the window: 8
Events confirmed by the source: 0
Events predicted by the source: 1
Unknown event type: 3
Cancelled runs, excluded: 4
No usable delay, excluded: 1

Latest source timestamp: 9/10/2026, 8:44:13 AM (Europe/Paris).

Runs are identified within each source. Identities across sources are kept separate without a proven match. Exclusions can overlap.

Latest available run: these times are historical.

Stops on the latest run

Poissy
Departure
Scheduled time07:37
Predicted by the source07:37(0′)
Achères Grand Cormier
Arrival
Scheduled time07:40
Predicted by the source07:41(+1′)
Departure
Scheduled time07:41
Predicted by the source07:41(0′)
Maisons-Laffitte
Arrival
Scheduled time07:44
Predicted by the source07:49(+5′)
Departure
Scheduled time07:45
Predicted by the source07:49(+4′)
Sartrouville
Arrival
Scheduled time07:46
Predicted by the source07:51(+5′)
Departure
Scheduled time07:47
Predicted by the source07:51(+4′)
Houilles - Carrières-sur-Seine
Arrival
Scheduled time07:50
Predicted by the source07:54(+4′)
Departure
Scheduled time07:50
Predicted by the source07:54(+4′)
Nanterre Préfecture - RER
Arrival
Scheduled time07:54
Predicted by the source07:58(+4′)
Departure
Scheduled time07:56
Predicted by the source08:01(+5′)
La Grande Arche de la Défense
Arrival
Scheduled time07:58
Predicted by the source08:02(+4′)
Departure
Scheduled time07:59
Predicted by the source08:04(+5′)
Charles-de-Gaulle Étoile
Arrival
Scheduled time08:02
Predicted by the source08:06(+4′)
Departure
Scheduled time08:03
Predicted by the source08:08(+5′)
Auber
Arrival
Scheduled time08:06
Predicted by the source08:09(+3′)
Departure
Scheduled time08:06
Predicted by the source08:12(+6′)
Châtelet les Halles
Arrival
Scheduled time08:08
Predicted by the source08:14(+6′)
Departure
Scheduled time08:09
Predicted by the source08:15(+6′)
Paris Gare de Lyon
Arrival
Scheduled time08:12
Predicted by the source08:16(+4′)
Departure
Scheduled time08:12
Predicted by the source08:17(+5′)
Nation
Arrival
Scheduled time08:15
Predicted by the source08:19(+4′)
Departure
Scheduled time08:15
Predicted by the source08:20(+5′)
Vincennes
Arrival
Scheduled time08:18
Predicted by the source08:22(+4′)
Departure
Scheduled time08:19
Predicted by the source08:23(+4′)
Fontenay-sous-Bois
Arrival
Scheduled time08:21
Predicted by the source08:24(+3′)
Departure
Scheduled time08:21
Predicted by the source08:25(+4′)
Nogent-sur-Marne
Arrival
Scheduled time08:23
Predicted by the source08:26(+3′)
Departure
Scheduled time08:23
Predicted by the source08:27(+4′)
Joinville-le-Pont
Arrival
Scheduled time08:25
Predicted by the source08:28(+3′)
Departure
Scheduled time08:25
Predicted by the source08:29(+4′)
Saint-Maur-des-Fossés - Créteil
Arrival
Scheduled time08:27
Predicted by the source08:30(+3′)
Departure
Scheduled time08:28
Predicted by the source08:32(+4′)
Le Parc de Saint-Maur RER
Arrival
Scheduled time08:29
Predicted by the source08:32(+3′)
Departure
Scheduled time08:30
Predicted by the source08:33(+3′)
Champigny
Arrival
Scheduled time08:31
Predicted by the source08:34(+3′)
Departure
Scheduled time08:32
Predicted by the source08:36(+4′)
La Varenne Saint-Hilaire - Chennevières-sur-Marne
Arrival
Scheduled time08:34
Predicted by the source08:37(+3′)
Departure
Scheduled time08:35
Predicted by the source08:38(+3′)
Sucy-en-Brie - Bonneuil-sur-Marne
Arrival
Scheduled time08:37
Predicted by the source08:39(+2′)
Departure
Scheduled time08:37
Predicted by the source08:40(+3′)
Boissy-Saint-Léger
Arrival
Scheduled time08:40
Predicted by the source08:43(+3′)

Punctuality of recorded routes

Reported delays per run with a complete route; separate from the ranking sample. A predicted delay does not confirm a passage.

Cancelled runs are excluded from the punctuality calculation.

runs reported on time—

average delay+1.8 min

max delay+6 min

runs reported4

cancelled runs4

stops22

Delay values

DateDelay (min)

2026-09-073.5454545454545454

2026-09-08-0.09090909090909091

2026-09-09-0.2727272727272727

2026-09-103.8636363636363638

Typical schedule

Stops and times of RER NOTE20 from Poissy to Boissy-Saint-Léger on a typical weekday. Actual times may vary.

StopArrivalDeparture

Poissy—07:37

Achères Grand Cormier07:4007:41

Maisons-Laffitte07:4407:45

Sartrouville07:4607:47

Houilles - Carrières-sur-Seine07:5007:50

Nanterre Préfecture - RER07:5407:56

La Grande Arche de la Défense07:5807:59

Charles-de-Gaulle Étoile08:0208:03

Auber08:0608:06

Châtelet les Halles08:0808:09

Paris Gare de Lyon08:1208:12

Nation08:1508:15

Vincennes08:1808:19

Fontenay-sous-Bois08:2108:21

Nogent-sur-Marne08:2308:23

Joinville-le-Pont08:2508:25

Saint-Maur-des-Fossés - Créteil08:2708:28

Le Parc de Saint-Maur RER08:2908:30

Champigny08:3108:32

La Varenne Saint-Hilaire - Chennevières-sur-Marne08:3408:35

Sucy-en-Brie - Bonneuil-sur-Marne08:3708:37

Boissy-Saint-Léger08:40—

Frequently asked questions

What time does RER NOTE20 depart?

RER NOTE20 departs from Poissy at 07:37 (typical schedule from reported times). Actual times may vary.

How many stops does RER NOTE20 make?

RER NOTE20 connects Poissy to Boissy-Saint-Léger with 22 stops.

Is RER NOTE20 on time?

Over the reported runs, every run of RER NOTE20 was cancelled (4 runs): punctuality cannot be established.

Other trains on this line

Live status and delays for the other trains serving the same stations.

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