You are allowed up to two hours for metro and RER after validation and 90 minutes for buses and trams. Tickets purchased individually or in packages of 10 are permanently valid for single use and are issued without an expiration date.
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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.
Yes, you can buy your ticket ahead of time if you want - as long as the ticket hasn't been passed through the turnstile, it'll remain valid. But as others have mentioned, at least one ticket counter will be open at each station. You can also use the ticket vending machines (if you have correct change).
How long is the t+ ticket valid? One validated, the t+ ticket allows you to make as many transfers as you want on the metro and RER networks for 90 minutes hours (after the first validation), and for 90 minutes on the bus and tram networks (between the first and last validation).
Tickets purchased individually or in packages of 10 are permanently valid for single use and are issued without an expiration date. Single tickets can be purchased from metro/RER stations, some bus terminals, and registered retailers, usually tobacconists and bookshops, displaying the RATP sign.
One validated, the t+ ticket allows you to make as many transfers as you want on the metro and RER networks for 90 minutes hours (after the first validation), and for 90 minutes on the bus and tram networks (between the first and last validation).
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.
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).
Period of Validity for Flight TicketsThe airplane ticket you have reserved and its price are valid only for the flight you have reserved. An unreserved airplane ticket and its price are, as a rule, valid for 1 year as calculated from the day after the ticket is issued, as well as the day it is issued.
An Open Return is a flexible ticket that doesn't make you choose a specific time or date to return. They're valid for one calendar month from the date of the outward journey.
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.
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).
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.
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.
The metro pass consists of a simple ticket, no photo required. It provides travel rides in Paris (with no limit) on the transport system including Metro, RER (regional express trains), bus, tramway, suburban Transilien SNCF trains, Montmartre funicular, Noctambus, Optile bus system and Montmartrobus.
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.
Anytime Day Return tickets are valid for one return journey. The outward portion is valid on the date shown on the ticket and until 04:29 the following morning.
If you need to travel on a different date, you will need to cancel your ticket and buy a new one. Your ticket is refundable (with no admin fee) if the service you planned to travel on is delayed or cancelled, and you choose not to travel.
Anytime train tickets are completely flexible tickets that let you travel at any time of the day. If you know you have to be somewhere but aren't sure for how long, then an Anytime ticket is the perfect way to cover all your bases.