RER B from CDG to Paris: What to Know
Landing at Charles de Gaulle and trying to work out the cheapest sensible way into the city? For many travellers, the RER B from CDG to Paris is the best balance of price, speed and simplicity – but only if you know which station, which train, and when it is worth choosing something else.
The RER B is the suburban rail line that connects Paris Charles de Gaulle Airport with central Paris. It is not a door-to-door transfer, and it is not the easiest option if you are carrying several cases, travelling with very young children, or arriving after a long-haul flight feeling wiped out. But for plenty of UK travellers on a city break, it is a practical public transport choice that keeps costs down and avoids road traffic.
Is the RER B from CDG to Paris a good option?
Usually, yes. If you are staying near a station with good Metro or RER connections, the train is often the most efficient airport transfer for independent travellers. Journeys into central Paris generally take around 35 to 45 minutes depending on where you get off and whether there are service disruptions.
The main advantage is value. A taxi can make more sense for groups, late arrivals or heavy luggage, but for solo travellers and couples the RER B is often much cheaper. It is also a lower-waste option than a private car transfer, which suits travellers trying to make more responsible choices without making the trip harder than it needs to be.
Where to catch the RER B at CDG
Charles de Gaulle has two airport train stations relevant to most passengers. If you arrive at Terminal 2, you will usually use Aéroport Charles de Gaulle 2 TGV. If you arrive at Terminal 1 or Terminal 3, you will generally head for Aéroport Charles de Gaulle 1. The station names can be confusing because CDG 1 station is also used by Terminal 3 passengers via the airport shuttle.
Airport signs for Paris by train are generally clear, but allow extra time if it is your first visit. Walking routes inside the airport can feel longer than expected, especially after a flight.
Before boarding, check that the train is heading towards Paris. The key central stations most visitors care about are Gare du Nord, Châtelet-Les Halles, Saint-Michel Notre-Dame, Luxembourg and Denfert-Rochereau.
Tickets, cost and how it works
You need a valid airport-to-Paris ticket, not just a standard Metro fare. Buy it from a machine or official ticket desk before boarding, and keep it until the end of your journey because you may need it to exit barriers.
If you are using a phone app or contactless option, check carefully whether airport travel is covered. Paris ticketing rules are improving, but they are not always as intuitive as travellers expect. This is one of the easiest places to make a costly mistake.
If your accommodation is beyond walking distance from your arrival station, you may need to connect onwards by Metro or another RER line. In many cases the airport fare covers the full journey into Paris, but always verify before travelling, especially if transport rules have recently changed.
What the journey is actually like
The train itself is functional rather than glamorous. Expect commuter-style seating, limited luggage space and busier carriages at peak times. If you land during the weekday rush, you may need to stand for part of the journey.
That said, the route is straightforward once you are on board. Gare du Nord is a common interchange if you are connecting to Eurostar-linked areas, while Châtelet-Les Halles works well for many central neighbourhoods. Denfert-Rochereau is useful for the south of the city.
If your hotel is in the Marais, around Opéra, or in one of the less rail-friendly pockets of Paris, the cheapest train option may not end up being the easiest overall. That is where a transfer, taxi or pre-booked pickup can save hassle.
When not to take the RER B
The RER B from CDG to Paris is not automatically the best choice for every arrival. If you are landing very late, carrying bulky luggage, travelling as a family with pushchairs, or staying somewhere awkward to reach by Metro, the train can become a false economy.
There are also occasional strikes, engineering works and service interruptions on Paris public transport. These do not make the train unreliable all the time, but they do mean you should check the day’s service before you commit to it. A direct transfer is often worth the extra cost when timing matters.
Practical tips for a smoother trip
Keep bags close and avoid blocking doors, especially on busy trains. Like any major city rail service, the RER can attract opportunistic pickpocketing, particularly around interchange stations and crowded carriages. You do not need to be alarmed, just switched on.
If possible, sort your ticket before reaching the platform and have your destination written down. Paris station names can blur together when you are tired. A screenshot of your route helps if mobile signal drops or roaming is patchy.
For first-time visitors, one sensible approach is this: use the RER B if you are arriving in daylight, packing light and staying near a well-connected station. If any of those are not true, paying more for a simpler arrival may be the better decision. A calm first hour in Paris is often worth more than saving a few euros.
