RER ERIO31

RER

Massy - PalaiseauAéroport Charles de Gaulle 2 (Terminal 2)

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

Historical average delay — home ranking

-1.3 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: 3. 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: 6
Events confirmed by the source: 0
Events predicted by the source: 1
Unknown event type: 2
Cancelled runs, excluded: 3
No usable delay, excluded: 0

Latest source timestamp: 9/10/2026, 1:55:49 PM (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

Massy - Palaiseau
Departure
Scheduled time12:49
Predicted by the source12:49(0′)
Massy - Verrières-le-Buisson
Arrival
Scheduled time12:51
Predicted by the source12:50(-1′)
Departure
Scheduled time12:51
Predicted by the source12:52(+1′)
Les Baconnets
Arrival
Scheduled time12:53
Predicted by the source12:52(-1′)
Departure
Scheduled time12:53
Predicted by the source12:53(0′)
Fontaine Michalon
Arrival
Scheduled time12:54
Predicted by the source12:54(0′)
Departure
Scheduled time12:54
Predicted by the source12:55(+1′)
Antony
Arrival
Scheduled time12:56
Predicted by the source12:56(0′)
Departure
Scheduled time12:57
Predicted by the source12:57(0′)
La Croix de Berny
Arrival
Scheduled time12:58
Predicted by the source12:57(-1′)
Departure
Scheduled time12:58
Predicted by the source12:59(+1′)
Parc de Sceaux
Arrival
Scheduled time13:00
Predicted by the source12:59(-1′)
Departure
Scheduled time13:00
Predicted by the source13:00(0′)
Bourg-la-Reine
Arrival
Scheduled time13:01
Predicted by the source13:01(0′)
Departure
Scheduled time13:02
Predicted by the source13:03(+1′)
Bagneux
Arrival
Scheduled time13:04
Predicted by the source13:04(0′)
Departure
Scheduled time13:05
Predicted by the source13:05(0′)
Arcueil - Cachan
Arrival
Scheduled time13:06
Predicted by the source13:06(0′)
Departure
Scheduled time13:06
Predicted by the source13:07(+1′)
Laplace
Arrival
Scheduled time13:08
Predicted by the source13:08(0′)
Departure
Scheduled time13:08
Predicted by the source13:09(+1′)
Gentilly
Arrival
Scheduled time13:10
Predicted by the source13:09(-1′)
Departure
Scheduled time13:10
Predicted by the source13:10(0′)
Cité Universitaire
Arrival
Scheduled time13:11
Predicted by the source13:11(0′)
Departure
Scheduled time13:12
Predicted by the source13:12(0′)
Denfert Rochereau
Arrival
Scheduled time13:14
Predicted by the source13:13(-1′)
Departure
Scheduled time13:15
Predicted by the source13:15(0′)
Port Royal
Arrival
Scheduled time13:16
Predicted by the source13:16(0′)
Departure
Scheduled time13:17
Predicted by the source13:17(0′)
Luxembourg
Arrival
Scheduled time13:18
Predicted by the source13:17(-1′)
Departure
Scheduled time13:18
Predicted by the source13:18(0′)
Saint-Michel
Arrival
Scheduled time13:20
Predicted by the source13:19(-1′)
Departure
Scheduled time13:21
Predicted by the source13:21(0′)
Châtelet les Halles
Arrival
Scheduled time13:22
Predicted by the source13:22(0′)
Departure
Scheduled time13:23
Predicted by the source13:24(+1′)
Gare du Nord
Arrival
Scheduled time13:26
Predicted by the source13:26(0′)
Departure
Scheduled time13:27
Predicted by the source13:28(+1′)
Aulnay-sous-Bois
Arrival
Scheduled time13:41
Predicted by the source13:40(-1′)
Departure
Scheduled time13:42
Predicted by the source13:42(0′)
Parc des Expositions
Arrival
Scheduled time13:47
Predicted by the source13:47(0′)
Departure
Scheduled time13:48
Predicted by the source13:48(0′)
Aéroport Roissy Charles de Gaulle 1
Arrival
Scheduled time13:53
Predicted by the source13:52(-1′)
Departure
Scheduled time13:54
Predicted by the source13:54(0′)
Aéroport - Charles-de-Gaulle 2 RER
Arrival
Scheduled time13:56
Predicted by the source13:55(-1′)

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+0.5 min

max delay+2 min

runs reported3

cancelled runs3

stops23

Delay values

DateDelay (min)

2026-09-080.5909090909090909

2026-09-090.6818181818181818

2026-09-100.30434782608695654

Typical schedule

Stops and times of RER ERIO31 from Massy - Palaiseau to Aéroport Charles de Gaulle 2 (Terminal 2) on a typical weekday. Actual times may vary.

StopArrivalDeparture

Massy - Palaiseau—12:49

Massy - Verrières-le-Buisson12:5112:51

Les Baconnets12:5312:53

Fontaine Michalon12:5412:54

Antony12:5612:57

La Croix de Berny12:5812:58

Parc de Sceaux13:0013:00

Bourg-la-Reine13:0113:02

Bagneux13:0413:05

Arcueil - Cachan13:0613:06

Laplace13:0813:08

Gentilly13:1013:10

Cité Universitaire13:1113:12

Denfert Rochereau13:1413:15

Port Royal13:1613:17

Luxembourg13:1813:18

Saint-Michel13:2013:21

Châtelet les Halles13:2213:23

Gare du Nord13:2613:27

Aulnay-sous-Bois13:4113:42

Parc des Expositions13:4713:48

Aéroport Roissy Charles de Gaulle 113:5313:54

Aéroport - Charles-de-Gaulle 2 RER13:56—

Frequently asked questions

What time does RER ERIO31 depart?

RER ERIO31 departs from Massy - Palaiseau at 12:49 (typical schedule from reported times). Actual times may vary.

How many stops does RER ERIO31 make?

RER ERIO31 connects Massy - Palaiseau to Aéroport Charles de Gaulle 2 (Terminal 2) with 23 stops.

Is RER ERIO31 on time?

Over the reported runs, every run of RER ERIO31 was cancelled (3 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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