The RER Paris takes the same tickets and the same passes as the Metro — within central Paris. That's an important distinction, because if you want to go outside of central Paris, you will need a different ticket. (The same applies to Metro tickets.)
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RER is an acronymn for Réseau Express Régional, or Regional Express Network, and refers to the rapid transit system which serves Paris and its surrounding suburbs. The RER currently has five lines, A-E, and is operated by an entirely different company than the Paris metro.
The T+ ticket allows you to use every Metro line, all RER lines in Paris (Regional Express Network), all bus lines (except Orlybus, Roissybus, lines 299, 350, 351 and Noctilien night buses) and all Tram lines as well as the Montmartre Funicular.
Paris RER TicketsWhen taking a RER train strictly within central Paris Zone 1 (visible in the first RER Map), you can use basic Paris Metro tickets for travel on the RER. Travel beyond Paris Zone 1 on the RER requires a special ticket: a Billet Ile-de-France.
Only multi-use Paris Metro/RER passes can be purchased online ahead of time. Single use RER tickets such as for the RER B from CDG to Paris, can only be purchased at ticket windows, offices and vending machines within Paris.
How Much do the RER Train Tickets Cost from Paris CDG Airport? A one-way ticket for RER B trains costs 11.40€/11.40$ for adult passengers, while an airport ticket for children between 4 and 9 is 8€/8$. Younger children travel for free. Tickets are available at the station's automatic machines and ticket offices.
Metro. The Paris Metro is our preferred way to get around the city when we travel around central Paris. This is because it is fast, affordable, has a regular service, and it covers the majority of the attractions in the city centre. The Paris metro system is currently made up of 16 lines and 302 stations.
Paris RER tickets and fares 2023Adult fare €11.45 walk-up price/€12.40 online with additional booking fee. Child 4-9 €8 walk-up/€8.80 online. CDG Airport is in zone 5 of the Paris public transport system. There are a number of Paris public transport passes (see below).
The least expensive and most flexible option is to take the train, called the RER B, which stops at major metro stations throughout Paris. The Paris City Pass discount card offers a free one-way shuttle bus from CDG to Paris. Read our guide to the Paris City Pass here to see if this is a good option for you.
The RER B line is a direct rail link between Paris (Denfert-Rochereau, Saint-Michel-Notre-Dame, Châtelet-Les-Halles, Gare du Nord) and Paris-Charles de Gaulle Airport. A free CDGVAL shuttle connects the stations with the airport terminals.
The Navigo Daily Pass.It is valid for one day, from 12 am to 11.59 pm. You can buy this pass up to 6 days in advance, and it will start working after the first validation and until the end of the metro service that same day. The cost of this pass is 8,45€ (zones 1-2, 2-3, 3-4, 4-5), and 20,10€ (zones 1-5).
RER C TrainThe RER C line (yellow) will take you from Paris to Versailles for just €3.65 ($4) per person each way. This train travels through Paris from east to west while following the river Seine. Each station is about 10 minutes from the next stop, and the train comes every 15 minutes.
In the metro and RER, tickets are valid for two hours for a single, one-way trip, which might include transfers. It cannot be used for several different trips within this time period. In the bus network, tickets are valid for 90 minutes between the first and last validation, including one or several transfers.