In the RER, as long as you remain within the city limits, tickets and prices are identical to the metro (RER stations also have their own ticket offices and machines).
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A single ticket costs 1.70€ and allows unlimited travel and transfer within the Metro for up to 90 minutes. You can also make one transfer between Metro and RER (the ticket is valid until you exit a Metro station). The Metro and RER share the same stations, so you don't need to exit the Metro to transfer to the RER.
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.)
In the metro, your t+ ticket allows you to travel on the entire network.In the RER, your t+ ticket allows you to travel only within Paris. Any travel outside of Paris requires the purchase of a point-to-point ticket (Île-de-France ticket), the price of which is calculated on a station-to-station basis.
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 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).
To access the RER system you will need a ticket of course. Whatever ticket you have, (including travel passes) you insert the ticket into an automatic barrier which validates it and allows you through or you use a contactless pass and tap it on the reader.
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.
Depending on which zones you choose, the Paris Visite pass allows you to ride the metro, RER, Transilien suburban train network, tram, bus (except the Jetbus, Allobus, Roissy CDG, tourist bus routes and Air France buses), Orlyval, and the Montmartre funicular.
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.
Paris Metro tickets have no expiry; You can use them at any time in the future. Tickets can be purchased from ticket windows inside stations or through automated ticket vending machines accepting Euro coins and smart chip credit cards. The single ticket price as of Jan. 1, 2023 is 2.10€.
As of 2023, the city has transitioned from paper tickets to a modern, electronic system, in an attempt to make it easier for both visitors and locals to navigate the city. Paper metro ticket books gradually disappeared in 2022!
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.
RER C TrainThe RER C line (yellow) will take you from Paris to Versailles for just €3.65 ($4) per person each way. This train travels through Paris from east to west while following the river Seine. Each station is about 10 minutes from the next stop, and the train comes every 15 minutes.
How Much do the RER Train Tickets Cost from Paris CDG Airport? A one-way ticket for RER B trains costs 11.40€/11.40$ 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.
A RER Ticket is known in Paris as a Billet Origine-Destination, a small paper coupon like train ticket for Paris and surrounding Ile-de-France region priced for the length of the trip, calculated from departure station to arrival station. Calculate ticket cost from station to station here.
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.