What is the difference between RER and Metro in Paris?

The RER (Réseau Express Régional) and the Métro are both public transportation systems in Paris, but they serve different purposes.

Métro:

- The Métro is an underground rapid transit system that operates within the city of Paris.

- It has 14 lines and 303 stations.

- It is primarily used for short-distance travel within the city.

- Tickets and passes are available for single rides, day passes, and weekly passes.

- It operates from 5:30 am to 1:15 am.

RER:

- The RER is a suburban rail system that serves Paris and its surrounding suburbs.

- It has 5 lines and 257 stations.

- It is used for longer-distance travel, connecting the city center with outer suburbs and even some nearby cities.

- Tickets and passes are available for single rides, day passes, and weekly passes, but additional charges may apply for travel outside of Paris.

- It operates from 5:00 am to midnight.

In summary, the Métro is best for getting around within Paris, while the RER is better for traveling to and from the suburbs or nearby cities.