Île-de-France Mobilités (formerly STIF) is the organization in charge of all of Paris's public transport, serving cities and towns of the Île-de-France, the region surrounding metropolitan Paris (map).

Besides the RATP in central Paris, the system includes 16 Transilien train lines, 8 tramway lines, 3,783 km (2,351 miles) of track, more than 400 stations, and hundreds of Optile bus routes.

A distinction is made between these Île-de-France regional trains and SNCF Grandes Lignes (Main Line) intercity, long-distance and international trains. Usually, you buy tickets for the two different systems from different ticket machines or ticket offices. More...

Île-de-France Mobilités App

The useful Île-de-France Mobilités smartphone app for Apple iOS and Google Android allows you to buy tickets and transit passes (day, week, month, etc.) on your phone and use your phone as your ticket. Just call up the ticket on the app and hold your phone to the sensor at the turnstile to enter the system. More...

The Île-de-France Mobilités website has an English version with lots more information. More...

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