RER ERBE21

RER
Châtelet les HallesAéroport - Charles-de-Gaulle 2 RER
Passage confirmedPassage confirmed by the source at one or more stops. Other times are estimated.

Punctuality : 83% on time · average delay +1.5 min · over 6 observed days

Usually

Usual times are calculated from past runs. See the selected run’s timetable below.

Departs
18:05 · Massy - Palaiseau
Arrives
19:11 · Aéroport CDG (Terminal 2) - TGV
Journey time
1 h 06
Stops
24
Runs
Weekends

Latest available run: these times are historical.

Stops on the latest run

24 stops passed : 11 confirmed by the source, 13 from the forecast.

  1. Massy - Palaiseau
    Arrival
    Scheduled time
    Departure
    Scheduled time
    Predicted by the source(0′)
    Passed according to the source forecast
  2. Massy - Verrières
    Arrival
    Scheduled time
    Confirmed by the source(-1′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(-1′)
  3. Les Baconnets
    Arrival
    Scheduled time
    Predicted by the source(-1′)
    Departure
    Scheduled time
    Predicted by the source(-1′)
    Passed according to the source forecast
  4. Fontaine Michalon
    Arrival
    Scheduled time
    Predicted by the source(-1′)
    Departure
    Scheduled time
    Predicted by the source(-1′)
    Passed according to the source forecast
  5. Antony
    Arrival
    Scheduled time
    Predicted by the source(-1′)
    Departure
    Scheduled time
    Predicted by the source(-1′)
    Passed according to the source forecast
  6. La Croix de Berny
    Arrival
    Scheduled time
    Predicted by the source(-1′)
    Departure
    Scheduled time
    Predicted by the source(-1′)
    Passed according to the source forecast
  7. Parc de Sceaux
    Arrival
    Scheduled time
    Confirmed by the source(0′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(0′)
  8. Bourg-la-Reine
    Arrival
    Scheduled time
    Predicted by the source(0′)
    Departure
    Scheduled time
    Predicted by the source(0′)
    Passed according to the source forecast
  9. Bagneux
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+2′)
  10. Arcueil - Cachan
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Predicted by the source(+2′)
    Passed according to the source forecast
  11. Laplace
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Predicted by the source(+2′)
    Passed according to the source forecast
  12. Gentilly
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Predicted by the source(+2′)
    Passed according to the source forecast
  13. Cité Universitaire
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+2′)
  14. Denfert-Rochereau
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+2′)
  15. Port Royal
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Predicted by the source(+2′)
    Passed according to the source forecast
  16. Luxembourg
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+2′)
  17. Saint-Michel Notre-Dame
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+1′)
  18. Châtelet - Les Halles
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+2′)
  19. Gare du Nord
    Arrival
    Scheduled time
    Confirmed by the source(+2′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+2′)
  20. La Plaine Stade de France
    Arrival
    Scheduled time
    Confirmed by the source(+3′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+3′)
  21. Aulnay-sous-Bois
    Arrival
    Scheduled time
    Confirmed by the source(+3′)
    Arrival reported by the source, no actual time
    Departure
    Scheduled time
    Predicted by the source(+3′)
  22. Parc des Expositions
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Predicted by the source(+2′)
    Passed according to the source forecast
  23. Aéroport CDG 1 (Terminal 3)
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Predicted by the source(+2′)
    Passed according to the source forecast
  24. Aéroport CDG (Terminal 2) - TGV
    Arrival
    Scheduled time
    Predicted by the source(+2′)
    Departure
    Scheduled time
    Passed according to the source forecast

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.

runs reported on time83%
average delay+1.5 min
max delay+7 min
runs reported6
stops24
0m3m5m10/1017/1025/10
Delay values
DateDelay (min)
2026-10-101.1818181818181819
2026-10-110.3181818181818182
2026-10-171.9565217391304348
2026-10-181.3478260869565217
2026-10-242.5652173913043477
2026-10-251.7083333333333333
Historical average delay — home ranking: +1.5 min (over 8 runs)

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: 8. Calculated on: (Europe/Paris).

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

Calculation window: 10/2/2026, 8:33:03 PM – 11/1/2026, 7:33:03 PM (Europe/Paris).

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

Latest source timestamp: 10/30/2026, 4:10:45 AM (Europe/Paris).

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

Typical schedule

Stops and times of RER ERBE21 from Châtelet les Halles to Aéroport - Charles-de-Gaulle 2 RER on a typical weekday. Actual times may vary.

StopArrivalDeparture
Massy - Palaiseau18:0518:05
Massy - Verrières18:0718:07
Les Baconnets18:0918:09
Fontaine Michalon18:1018:10
Antony18:1218:13
La Croix de Berny18:1418:14
Parc de Sceaux18:1518:16
Bourg-la-Reine18:1718:18
Bagneux18:2018:20
Arcueil - Cachan18:2118:22
Laplace18:2318:24
Gentilly18:2518:26
Cité Universitaire18:2718:27
Denfert-Rochereau18:2918:30
Port Royal18:3118:32
Luxembourg18:3318:33
Saint-Michel Notre-Dame18:3518:36
Châtelet - Les Halles18:3718:38
Gare du Nord18:4118:42
La Plaine Stade de France18:4718:47
Aulnay-sous-Bois18:5618:57
Parc des Expositions19:0219:03
Aéroport CDG 1 (Terminal 3)19:0819:09
Aéroport CDG (Terminal 2) - TGV19:1119:11

Frequently asked questions

What time does RER ERBE21 depart?

RER ERBE21 departs from Massy - Palaiseau at 18:05 (typical schedule from reported times). Actual times may vary.

How many stops does RER ERBE21 make?

RER ERBE21 connects Châtelet les Halles to Aéroport - Charles-de-Gaulle 2 RER with 24 stops.

Is RER ERBE21 on time?

Over the reported runs, RER ERBE21 was reported on time 83% of runs, with an average delay of 1.5 minutes.

Other trains on this line

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

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