RER GUIZ27

RER

Massy - PalaiseauAulnay-sous-Bois

CancelledAll 25 stops on this run are reported cancelled.

Historical average delay — home ranking

+1 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: 1. 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: 4
Events confirmed by the source: 0
Events predicted by the source: 0
Unknown event type: 1
Cancelled runs, excluded: 3
No usable delay, excluded: 0

Latest source timestamp: 9/10/2026, 9:33:46 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

Massy - PalaiseauCancelled
Departure
Scheduled time08:37
Predicted by the source08:37(0′)
Massy - Verrières-le-BuissonCancelled
Arrival
Scheduled time08:39
Predicted by the source08:39(0′)
Departure
Scheduled time08:39
Predicted by the source08:39(0′)
Les BaconnetsCancelled
Arrival
Scheduled time08:41
Predicted by the source08:41(0′)
Departure
Scheduled time08:41
Predicted by the source08:41(0′)
Fontaine MichalonCancelled
Arrival
Scheduled time08:42
Predicted by the source08:42(0′)
AntonyCancelled
Arrival
Scheduled time08:43
Predicted by the source08:43(0′)
Departure
Scheduled time08:44
Predicted by the source08:44(0′)
La Croix de BernyCancelled
Arrival
Scheduled time08:45
Predicted by the source08:45(0′)
Departure
Scheduled time08:46
Predicted by the source08:46(0′)
Parc de SceauxCancelled
Arrival
Scheduled time08:47
Predicted by the source08:47(0′)
Departure
Scheduled time08:48
Predicted by the source08:48(0′)
Bourg-la-ReineCancelled
Arrival
Scheduled time08:49
Predicted by the source08:49(0′)
Departure
Scheduled time08:50
Predicted by the source08:49(-1′)
BagneuxCancelled
Arrival
Scheduled time08:52
Predicted by the source08:52(0′)
Departure
Scheduled time08:52
Predicted by the source08:52(0′)
Arcueil - CachanCancelled
Arrival
Scheduled time08:53
Predicted by the source08:53(0′)
Departure
Scheduled time08:54
Predicted by the source08:54(0′)
LaplaceCancelled
Arrival
Scheduled time08:56
Predicted by the source08:56(0′)
Departure
Scheduled time08:56
Predicted by the source08:56(0′)
GentillyCancelled
Arrival
Scheduled time08:57
Predicted by the source08:57(0′)
Departure
Scheduled time08:58
Predicted by the source08:58(0′)
Cité UniversitaireCancelled
Arrival
Scheduled time08:59
Predicted by the source08:59(0′)
Departure
Scheduled time09:00
Predicted by the source08:59(-1′)
Denfert RochereauCancelled
Arrival
Scheduled time09:02
Predicted by the source09:02(0′)
Departure
Scheduled time09:03
Predicted by the source09:02(-1′)
Port RoyalCancelled
Arrival
Scheduled time09:04
Predicted by the source09:04(0′)
Departure
Scheduled time09:04
Predicted by the source09:04(0′)
LuxembourgCancelled
Arrival
Scheduled time09:05
Predicted by the source09:05(0′)
Departure
Scheduled time09:06
Predicted by the source09:06(0′)
Saint-MichelCancelled
Arrival
Scheduled time09:07
Predicted by the source09:07(0′)
Departure
Scheduled time09:08
Predicted by the source09:08(0′)
Châtelet les HallesCancelled
Arrival
Scheduled time09:10
Predicted by the source09:10(0′)
Departure
Scheduled time09:11
Predicted by the source09:10(-1′)
Gare du NordCancelled
Arrival
Scheduled time09:14
Predicted by the source09:14(0′)
Departure
Scheduled time09:15
Predicted by the source09:15(0′)
La Plaine Stade de France - Saint-Denis - AubervilliersCancelled
Arrival
Scheduled time09:19
Predicted by the source09:19(0′)
Departure
Scheduled time09:20
Predicted by the source09:20(0′)
La Courneuve - AubervilliersCancelled
Arrival
Scheduled time09:22
Predicted by the source09:22(0′)
Departure
Scheduled time09:22
Predicted by the source09:22(0′)
Le BourgetCancelled
Arrival
Scheduled time09:25
Predicted by the source09:25(0′)
Departure
Scheduled time09:25
Predicted by the source09:25(0′)
DrancyCancelled
Arrival
Scheduled time09:28
Predicted by the source09:28(0′)
Departure
Scheduled time09:28
Predicted by the source09:28(0′)
Le Blanc-MesnilCancelled
Arrival
Scheduled time09:30
Predicted by the source09:30(0′)
Departure
Scheduled time09:30
Predicted by the source09:30(0′)
Aulnay-sous-BoisCancelled
Arrival
Scheduled time09:32
Predicted by the source09:32(0′)

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+0.2 min

max delay+1 min

runs reported1

cancelled runs3

stops25

Typical schedule

Stops and times of RER GUIZ27 from Massy - Palaiseau to Aulnay-sous-Bois on a typical weekday. Actual times may vary.

StopArrivalDeparture

Massy - Palaiseau—08:37

Massy - Verrières-le-Buisson08:3908:39

Les Baconnets08:4108:41

Fontaine Michalon08:42—

Antony08:4308:44

La Croix de Berny08:4508:46

Parc de Sceaux08:4708:48

Bourg-la-Reine08:4908:50

Bagneux08:5208:52

Arcueil - Cachan08:5308:54

Laplace08:5608:56

Gentilly08:5708:58

Cité Universitaire08:5909:00

Denfert Rochereau09:0209:03

Port Royal09:0409:04

Luxembourg09:0509:06

Saint-Michel09:0709:08

Châtelet les Halles09:1009:11

Gare du Nord09:1409:15

La Plaine Stade de France - Saint-Denis - Aubervilliers09:1909:20

La Courneuve - Aubervilliers09:2209:22

Le Bourget09:2509:25

Drancy09:2809:28

Le Blanc-Mesnil09:3009:30

Aulnay-sous-Bois09:32—

Frequently asked questions

What time does RER GUIZ27 depart?

RER GUIZ27 departs from Massy - Palaiseau at 08:37 (typical schedule from reported times). Actual times may vary.

How many stops does RER GUIZ27 make?

RER GUIZ27 connects Massy - Palaiseau to Aulnay-sous-Bois with 25 stops.

Is RER GUIZ27 on time?

Over the reported runs, every run of RER GUIZ27 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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