RER UZAR21
RERNext scheduled journey — timetable: 2026-11-02
Punctuality : 75% on time · average delay +3.2 min · over 20 observed days
Usually
- Departs
- 07:41
- Arrives
- 09:01
- Journey time
- 1 h 20
- Stops
- 26
- Runs
- Monday to Friday
Next scheduled journey — timetable
- Boissy-Saint-LégerScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Sucy - BonneuilScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- La Varenne - ChennevièresScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- ChampignyScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Le Parc de Saint-MaurScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Saint-Maur - CréteilScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Joinville-le-PontScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Nogent-sur-MarneScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Fontenay-sous-BoisScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- VincennesScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- NationScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Gare de LyonScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Châtelet - Les HallesScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- AuberScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Charles de Gaulle - ÉtoileScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- La DéfenseScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Nanterre - PréfectureScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Houilles - Carrières-sur-SeineScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- SartrouvilleScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Maisons-LaffitteScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Achères VilleScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Conflans Fin d'OiseScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Neuville - UniversitéScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Cergy PréfectureScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Cergy Saint-ChristopheScheduled, not trackedArrivalScheduled timeDepartureScheduled time
- Cergy le HautScheduled, not trackedArrivalScheduled timeDepartureScheduled time
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.
Delay values
Historical average delay — home ranking: +4.4 min (over 20 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: 20. 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, 12:29:06 PM – 11/1/2026, 11:29:06 AM (Europe/Paris).
- Runs in the window
- 20
- Events confirmed by the source
- 0
- Events predicted by the source
- 20
- Unknown event type
- 0
- Cancelled runs, excluded
- 0
- No usable delay, excluded
- 0
Latest source timestamp: 10/30/2026, 9:01:19 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 UZAR21 from Boissy-Saint-Léger to Cergy le Haut on a typical weekday. Actual times may vary.
Frequently asked questions
What time does RER UZAR21 depart?
RER UZAR21 departs from Boissy-Saint-Léger at 07:41 (typical schedule from reported times). Actual times may vary.
How many stops does RER UZAR21 make?
RER UZAR21 connects Boissy-Saint-Léger to Cergy le Haut with 26 stops.
Is RER UZAR21 on time?
Over the reported runs, RER UZAR21 was reported on time 75% of runs, with an average delay of 3.2 minutes.
Other trains on this line
Live status and delays for the other trains serving the same stations.