How does the Paris RER work?

The RER lines (Réseau Express Régional or Regional Express Network) are different from other train lines because they do not terminate in Paris. They cross the capital underground, so that passengers can get from one side of the region to the other on the same line.



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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.

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Paris RER Tickets When 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.

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A standard tariff ticket (T+) allows you to travel on any metro or RER line inside the city limits (any Metro station and/or RER stations in Zone 1). Travelling outside the city on the RER, requires a more expensive ticket. Free maps are available from the ticket counter in every station.

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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.

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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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Useful advice. The RER has less stops and is a lot faster than the Paris Metro. Therefore, it is more convenient to take the express train for longer distances.

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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.

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You can buy the ticket you need from the kiosks (or vending machines) right at the entrance to the airport RER station. The line is RER B. Current cost is €10.30 per ticket, one way. Similarly, if you want to take the RER back to CDG on your departure day, buy your ticket at the RER B station.

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You can also take Line 6 (green) to Bir-Hakeim Station (8 mins) or Line 8 (purple) to the École-Militaire Station (14 mins). From each of these stations, you can simply walk to the Eiffel Tower. You can travel to the Eiffel Tower on line C of the RER. You can get off at the Champ de Mars station.

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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.

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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.

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According to the calendar shared by the French PM, you will have to wait until February 16, 2022, to be allowed to drink and eat “normally” again on public transit.

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Yes, tap water in Paris is perfectly safe to drink and is readily available wherever you go, even at public water fountains. As long as taps aren't labeled eau non potable—meaning “not for drinking” in French—everything else is potable. In fact, drinking water from the fountains of Paris has been encouraged.

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Tipping in France is not mandatory. Even though it is always appreciated, it's up to the customers to decide if they want to tip or not. Unlike other countries, the price of the service is included in the total cost of the bill. You will never be asked to tip, but it's common to leave one if the service was good.

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RER C Train The 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.

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Advance purchase tickets are cheaper rail fares which are sold prior to the day of travel, and, in some cases on the day of departure.

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Is it okay if we book 30 days ahead ? In general it is cheaper to book long distance trains ahead of time - 10 to 12 weeks is when cheap (but inflexible) tickets are released for sale. At 30 days on most routes there would be a reasonable selection still on sale if you are not too choosy about times.

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No, your ticket is not valid for any other train and you would most likely be kicked off the train at the next stop once they try to scan your ticket. Or make you buy a new ticket on the spot of course.

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