How to get from Paris Charles de Gaulle Airport to Sorbonne University

The RER B regional express train is the backbone of public transport from CDG to central Paris. It's reliable, frequent, and offers a fixed, reasonable price. Since Sorbonne is not directly on the RER B line, a Metro transfer is required. This method is ideal for solo travelers, couples, and anyone with manageable luggage looking for the best value.

Step-by-Step Guide: CDG to Sorbonne via RER B & Metro

1. Find the RER B Station at CDG: Follow signs for “Paris by Train” or “RER” from your arrival terminal. You may need to take a free CDGVal shuttle train to Terminal 2 (Roissypôle) or Terminal 1 to access the station.
2. Purchase Your Ticket: Buy a “Billet Île-de-France” ticket from the machines or counters. Select Paris Centre (Zone 1) as your destination. The price is €11.45. This ticket is valid for the RER and any subsequent Metro/bus transfer within 90 minutes.
3. Board the RER B Train: Take any train whose final destination is “Massy-Palaiseau” or “Saint-Rémy-lès-Chevreuse” (southbound). Avoid trains terminating at “Mitry-Claye.” The ride to central Paris takes about 30-35 minutes.
4. Choose Your Transfer Point: For Sorbonne, the best stations to alight are:
   • Saint-Michel – Notre-Dame: Transfer to Metro line 4 (direction “Mairie de Montrouge”) for one stop to Saint-Michel, then walk 5 mins.
   • Châtelet – Les Halles: A major hub. Transfer to Metro line 4 (direction “Mairie de Montrouge”) for two stops to Saint-Michel, or to line 10 (direction “Boulogne – Pont de Saint-Cloud”) for Cluny – La Sorbonne.
5. Final Walk to Sorbonne: From Cluny – La Sorbonne station, you exit directly onto Place de la Sorbonne. From Saint-Michel station, walk east along Rue de la Huchette and Rue Saint-Jacques.

Key Considerations & Alternatives

Aspect	Details & Tips
Travel Time	Total: 60-75 mins (RER: 35 mins + Transfer/Wait: 10 mins + Metro: 5 mins + Walk: 10 mins).
Cost	€11.45 one-way. No price difference for express vs. regular RER B trains from CDG.
Frequency	Trains run every 10-15 minutes from approximately 04:50 to 00:30.
Luggage	Manageable but can be difficult during rush hours (7-9:30 AM, 5-7:30 PM). Avoid if you have multiple large suitcases.
Alternative Train	The RER B to Luxembourg station is an option, but it's a slightly longer walk (15 mins) to Sorbonne through the beautiful Jardin du Luxembourg.

Source: Official RATP Paris Transit Website.

Airport buses offer a hassle-free, direct connection between CDG and central Paris, with dedicated luggage space. They are an excellent choice for those with heavy bags or who prefer to avoid Metro transfers. While slightly slower than the train in pure travel time, they provide a more relaxed start to your Parisian journey.

Option 1: Roissybus (Operated by RATP) – The Official & Economical Choice

Roissybus provides a direct link to Opéra Garnier in the 9th arrondissement. From Opéra, you can take Metro line 7 (direction “Villejuif – Louis Aragon”) to Chaussée d’Antin – La Fayette, then transfer to line 9 (direction “Mairie de Montreuil”) to Saint-Augustin, then finally line 14 to Pyramides and walk, or take a taxi for the last leg. It's less direct for Sorbonne but very straightforward.

• Price: €16.20 one-way.
• Travel Time: 60-75 minutes to Opéra, plus 20-30 minutes Metro/walk/taxi to Sorbonne.
• Frequency: Every 15-20 minutes from 05:15 to 00:30.
• Boarding: Stops at all terminals. Buy tickets from machines at stops or on board.

Option 2: Le Bus Direct (Now Operated by BlaBlaCar Bus) – Multiple City Stops

This service (historically known as Les Cars Air France) offers routes with stops at key locations like Gare de Lyon and Gare Montparnasse. From Gare de Lyon, you can take Metro line 14 (fast and automated) directly to Châtelet and transfer as per the train guide. This can be more efficient depending on your final Sorbonne building.

• Price: From €18 one-way if booked online in advance.
• Travel Time: ~50-70 minutes to central stops, plus Metro connection.
• Key Advantage: Free Wi-Fi and dedicated luggage handling. Online booking is highly recommended.

Compare schedules and book: BlaBlaCar Bus Website.

Bus vs. Train: A Quick Decision Guide

Choose the Bus if: You have bulky luggage, arrive during peak Metro hours, prefer a single vehicle without transfers, or your hotel is near an Opéra or a BlaBlaCar Bus stop.
Choose the Train if: Your priority is the fastest possible door-to-door time (assuming light luggage and off-peak travel), you are on a tighter budget, or you want to start using the Metro system immediately.

For door-to-door service, especially after a long flight, with a group, or with excessive luggage, a direct road transfer is the most comfortable option. However, it comes at a significant premium and travel time is highly dependent on Parisian traffic.

Official Paris Taxis (G7)

Official taxis are available 24/7 at designated ranks outside each terminal. They charge a fixed fare from CDG to destinations on the Left Bank (Rive Gauche), which includes the Latin Quarter and Sorbonne University.

• Fixed Fare (Day & Night): €55 (Left Bank). This is NOT a metered fare for this specific journey; it's the legal maximum. Ensure the driver uses the fixed fare (“tarif fixe à la Rive Gauche”).
• Extra Charges: +€1.15 per piece of luggage, +20% surcharge after 5 PM until 10 AM, and on Sundays/holidays.
• Travel Time: 45 to 70 minutes, heavily dependent on traffic. Rush hour (8-10 AM, 5-8 PM) can easily double travel time.
• Reliability: High. Always available. You can also pre-book a G7 taxi via their app for a guaranteed, often fixed-price ride.

Official Information: G7 Airport Taxi Page.

Ride-Sharing Services (Uber, Bolt, Free Now)

These operate legally at CDG with designated pick-up points (usually in car parks P2/P4). Follow app instructions after collecting your luggage.

• Price: Typically €45 to €65, but subject to surge pricing during high demand, bad weather, or at night. Often comparable to or slightly cheaper than official taxis without surge.
• Advantage: Upfront pricing, cashless payment, and ease of use if you have the app.
• Disadvantage: Driver may cancel if traffic is bad. Need a stable data connection.

Pre-Booked Private Transfers

Services like Welcome Pickups or Suntransfers offer a pre-paid, meet-and-greet service. A driver will hold a sign with your name in the arrivals hall.

• Price: €70 to €90+ for a standard sedan.
• Best For: Business travelers, families, large groups (minivans available), or anyone valuing certainty and a seamless arrival after a tiring flight.
• Guarantee: Flight tracking, 60-minute free waiting time, fixed price paid in advance.

When to Splurge on a Taxi/Transfer: Late-night/early-morning arrivals (outside public transport hours), traveling with 3+ people (cost becomes comparable to train tickets), mobility issues, or simply wanting a stress-free start to your Parisian adventure.

Navigo Découverte Weekly Pass (Recommended for Longer Stays)

• What it is: A reloadable, personalized card valid for zones 1-5 (covers CDG and all of Paris).
• Cost: ~€30 for the weekly pass (Monday 00:00 to Sunday 23:59) + a one-time €5 card fee. You must provide a small passport-sized photo.
• Best For: Anyone staying in Paris for 4+ days within a Monday-Sunday period. It offers unlimited travel on Metro, RER, bus, and tram within zones 1-5, including the CDG RER B trip.
• Where to Buy: At major RER stations (like CDG). Fill out the form, attach your photo, and load the weekly pass.

Paris Visite Travel Pass (Tourist-Oriented)

• What it is: A pass for tourists offering unlimited travel and small discounts at some attractions.
• Cost (Zones 1-5): 1-day: ~€27, 2-day: ~€42, 3-day: ~€60, 5-day: ~€70.
• Verdict: It is rarely good value for money. The Navigo weekly pass is almost always cheaper for stays of 3 days or more within a week. Only consider Paris Visite if your stay doesn't align with a Monday-Sunday week and you will make an extraordinary number of trips per day.

For a single airport transfer and light tourism, buying individual “carnets” (packs of 10 Metro tickets for ~€17) or single tickets is usually sufficient.

Beyond schedules and fares, these practical tips will make your arrival in Paris much smoother.

• Beware of the “White Taxi” Scam: Only use official taxis from the designated rank. Ignore anyone soliciting rides inside the terminal. Official Paris taxis have a lit “TAXI Parisien” sign on the roof and a meter inside.
• Handle Your Luggage Smartly:
  • If you have very heavy bags and are taking the RER, aim for the first or last carriages, which are often less crowded.
  • Consider using a luggage delivery service like “CityBird” or “Point-Retrait” to send your suitcases directly to your accommodation from the airport, freeing you to explore easily.
• Master the Metro Transfer at Châtelet: Châtelet–Les Halles is one of the world's largest underground stations. It can be confusing. Allow extra time (10-15 mins) for transfers, follow color-coded signs for your line number, and don't hesitate to ask station staff (“Bonjour, la ligne dix, s’il vous plaît?”).
• Plan for Peak Seasons & Strikes: During French school holidays (check zones), summer, or strikes (“grèves”), public transport can be packed or disrupted. Always check the RATP traffic info on the day of travel. Have a backup plan (e.g., bus or taxi budget).
• Get a Local SIM/eSIM or Reliable Data: Having internet on arrival is crucial for using mapping apps (Google Maps, Citymapper), ride-sharing apps, and translating signs. Consider purchasing an eSIM from providers like Airalo or Orange before you travel.
• Your Arrival Terminal Matters: CDG has three main terminals (1, 2A-2G, 3). Check your terminal in advance to know the exact walking distance to the RER station or bus stop. The free CDGVal automated shuttle connects all terminals and the RER station.