How to get from Grisy-Suisnes to Chilly-Mazarin by RER and bus?

Grisy-Suisnes to Chilly-Mazarin - Bus Schedule

The 3121 bus from Grisy-Suisnes to Chilly-Mazarin runs from 05:29 to 21:08, with departures every 15 min-1 hr 5 min. The trip takes about 7 hr 32 min, with regular service throughout the operating hours.

From Grisy-Suisnes to Chilly-Mazarin by RER and bus

To get from Grisy-Suisnes to Chilly-Mazarin in Paris, you’ll need to take 2 bus lines and one RER line: take the 3121 bus from Maréchal Joffre station to Gare de Boissy-Saint-Léger station. Next, you’ll have to switch to the A RER and finally take the N21 bus from Châtelet station to Rue de Chilly station. The total trip duration for this route is approximately 7 hr 32 min. The RER and bus schedule from Grisy-Suisnes may change. We recommend you check the updated RER and bus schedule to Chilly-Mazarin on the Moovit app.

452min
Walk to bus station
Bus - 31213121
RER - A
RER - A
Bus - N21N21
Walk to Chilly-Mazarin
Leaves from Maréchal Joffre

Step by Step

  • 1
    Walk to bus station
    Walk to bus station
    Maréchal Joffre
    30 m • 1 min
  • 2
    Bus - 31213121
    Wait for bus
    3121
    Gare de Boissy-Saint-Léger
  • 3
    Ride to bus station
    Ride to bus station
    Gare de Boissy-Saint-Léger
    43 min
  • 4
    Walk to RER station
    Walk to RER station
    Boissy-Saint-Léger
    70 m • 1 min
  • 5
    RER - A
    Wait for RER
    A
    Saint-Germain-En-Laye
  • 6
    Ride to RER station
    Ride to RER station
    Châtelet - Les Halles
    32 min
  • 7
    Walk to bus station
    Walk to bus station
    Châtelet
    60 m • 1 min
  • 8
    Bus - N21N21
    Wait for bus
    N21
    Hôpital de Longjumeau
  • 9
    Ride to bus station
    Ride to bus station
    Rue de Chilly
    78 min
  • 10
    Walk to Chilly-Mazarin
    Walk to
    Chilly-Mazarin
    400 m • 5 min
*Duration based on 8am traffic
The Most Popular Urban Mobility App in Paris.
All local mobility options in one app

Public transit directions from Grisy-Suisnes to Chilly-Mazarin

The distance between Grisy-Suisnes, Paris and Chilly-Mazarin, Paris is approximately 69 km, which can typically be travelled in 452 min. Moovit will show you the directions from Grisy-Suisnes to Chilly-Mazarin by RER and bus, so no matter how you choose to travel in Paris – you will always have plenty of easy options.

RER And Bus schedule from Grisy-Suisnes to Chilly-Mazarin

To check the RER and bus schedule from Grisy-Suisnes to Chilly-Mazarin using the Moovit app, first download and open the app on your smartphone. Enter your starting point (Grisy-Suisnes) and destination (Chilly-Mazarin), then select the desired date and time of travel. Moovit will show all available RER and bus routes, estimated travel times, and any required transfers. You can view detailed departure and arrival times for each RER and bus, as well as real-time updates for delays or changes. Use this information to plan your trip and stay up to date with the latest RER and bus schedules.

Related Routes

Questions & Answers

  • What is the fastest way to get from Grisy-Suisnes to Chilly-Mazarin?

    The fastest way takes 452 minutes, using Bus line 3121, RER line A, Bus line N21.

  • Is there a direct bus between Grisy-Suisnes and Chilly-Mazarin in Paris?

    No, you’ll have to take 2 bus lines and one RER line in total. The total travelling time is 7 hr 32 min.

  • Which bus line goes from Grisy-Suisnes to Chilly-Mazarin in Paris?

    The 3121 bus line goes from Maréchal Joffre station near Grisy-Suisnes to Gare de Boissy-Saint-Léger station. From there you’ll have to take one bus line and one RER line till Gare de Boissy-Saint-Léger station near Chilly-Mazarin in Paris.

  • How long does it take to travel from Grisy-Suisnes to Chilly-Mazarin in Paris by bus and RER?

    The total travel time between Grisy-Suisnes and Chilly-Mazarin in Paris by bus and RER is about 7 hr 32 min.

  • Where do I get on the bus near Grisy-Suisnes to get to Chilly-Mazarin in Paris?

    Get on the 3121 bus from the Maréchal Joffre stop near Grisy-Suisnes in Paris.

  • Where do I get off the bus when travelling between Grisy-Suisnes and Chilly-Mazarin in Paris?

    Get off the bus at the Gare de Boissy-Saint-Léger stop, which is closest to Chilly-Mazarin in Paris.

Popular Routes