How to get from La Défense (Grande Arche) to Les Ulis by RER and bus?

La Défense (Grande Arche) to Les Ulis - RER Schedule

The A RER from La Défense (Grande Arche) to Les Ulis runs from 00:43 to 00:35, with departures every 5 min-4 hr 30 min. The trip takes about 1 hr 20 min, with regular service throughout the operating hours.

From La Défense (Grande Arche) to Les Ulis by RER and bus

To get from La Défense (Grande Arche) to Les Ulis in Paris, you’ll need to take 2 RER lines and one bus line: take the A RER from La Défense (Grande Arche) station to Châtelet - Les Halles station. Next, you’ll have to switch to the B RER and finally take the 4603 bus from Gare D'Orsay - Ville station to Montlhéry station. The total trip duration for this route is approximately 1 hr 20 min. The RER and bus schedule from La Défense (Grande Arche) may change. We recommend you check the updated RER and bus schedule to Les Ulis on the Moovit app.

80min
RER - A
RER - A
RER - B
RER - B
Bus - 46034603
Walk to Les Ulis
Leaves from La Défense (Grande Arche)

Step by Step

  • 1
    Start from RER station
    Start from RER station
    La Défense (Grande Arche)
  • 2
    RER - A
    Wait for RER
    A
    Marne-La-Vallée - Chessy
  • 3
    Ride to RER station
    Ride to RER station
    Châtelet - Les Halles
    10 min
  • 4
    RER - B
    Wait for RER
    B
    Saint-Rémy-Lès-Chevreuse
  • 5
    Ride to RER station
    Ride to RER station
    Orsay - Ville
    37 min
  • 6
    Walk to bus station
    Walk to bus station
    Gare D'Orsay - Ville
    30 m • 1 min
  • 7
    Bus - 46034603
    Wait for bus
    4603
    Centre Commercial Ulis 2
  • 8
    Ride to bus station
    Ride to bus station
    Montlhéry
    4 min
  • 9
    Walk to Les Ulis
    Walk to
    Les Ulis
    580 m • 8 min
*Duration based on 8am traffic
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Public transit directions from La Défense (Grande Arche) to Les Ulis

The distance between La Défense (Grande Arche), Paris and Les Ulis, Paris is approximately 37.38 km, which can typically be travelled in 80 min. Moovit will show you the directions from La Défense (Grande Arche) to Les Ulis 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 La Défense (Grande Arche) to Les Ulis

To check the RER and bus schedule from La Défense (Grande Arche) to Les Ulis using the Moovit app, first download and open the app on your smartphone. Enter your starting point (La Défense (Grande Arche)) and destination (Les Ulis), 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.

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Questions & Answers

  • What is the fastest way to get from La Défense (Grande Arche) to Les Ulis?

    The fastest way takes 80 minutes, using RER line A, RER line B, Bus line 4603.

  • Is there a direct RER between La Défense (Grande Arche) and Les Ulis?

    No, you’ll have to take 2 RER lines and one bus line in total. The total travelling time is 1 hr 20 min.

  • Which RER line goes from La Défense (Grande Arche) to Les Ulis?

    The A RER line goes from Châtelet - Les Halles station near La Défense (Grande Arche) in Arrondissement de Nanterre to Orsay - Ville station. From there you’ll have to take one RER line and one bus line till Orsay - Ville station near Les Ulis in Paris.

  • How long does it take to travel from La Défense (Grande Arche) to Les Ulis by RER and bus?

    The total travel time between La Défense (Grande Arche) in Arrondissement de Nanterre and Les Ulis in Paris by RER and bus is about 1 hr 20 min.

  • Where do I get on the RER near La Défense (Grande Arche) to get to Les Ulis?

    Get on the A RER from the Châtelet - Les Halles station near La Défense (Grande Arche) in Arrondissement de Nanterre.

  • Where do I get off the RER when travelling between La Défense (Grande Arche) and Les Ulis?

    Get off the RER at the Orsay - Ville stop, which is closest to Les Ulis in Paris.

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