Paris public transport, the Metro, buses and RER trains is highly integrated and this includes the ticketing system. If you want to travel outside the centre of Paris covered by the Metro you should be aware that Paris uses a zonal system with six circular zones radiating out from the centre. For perhaps the majority of visitors to Paris using the Metro system they will often not want to go anywhere outside the central zone or Zone 1.
Zone 1 is where nearly all hotels are and where all the city centre sights are located. You need to assess which zones you will use before buying your respective tickets. This, of course, also depends on how long you are likely to stay. Note: 'single journey' includes connections between the same types of vehicle i. 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.
You can also buy from the same sources a booklet of ten, called a carnet pronounced kar-nay , offering good savings. The reasoning is that these types of tickets often get lost, so not all the tickets are used as one is put away somewhere and lost.
The cardboard magnetic strip gets easily demagnitised and can no longer work and there are better electronic solutions now available.
The Carte Mobilis was an option most visitors seemed to be unaware of. A single calendar day card that provided unlimited rides on the transport system of the Ile-de-France region for a stated number of calendar days.
