For Metro to RER transfer in central Paris, the important rule in 2026 is to match the ticket to the transport network you are using. Metro, train and RER use the Metro-Train-RER ticket, while buses and trams use a separate Bus-Tram ticket. Airport rail entry and exit use the separate Paris Region–Airports ticket.

In 2026, a standard Metro-Train-RER ticket costs €2.55 and works across the Île-de-France Metro, train and RER network except for airport entry or exit. Airport rail trips use the separate Paris Region–Airports ticket, priced at €14 for a full-fare single trip.

Transfers inside the rail network

A Metro-Train-RER ticket allows Metro, train and RER connections without leaving the permitted network. With paperless tickets, validate as required at the gates or readers. If you leave the paid area and start a new journey, expect to need a new ticket unless the connection is one of the specifically authorized public-road connections.

The common mistake

Do not buy a Bus-Tram ticket for a Metro journey or assume a normal Metro-Train-RER ticket covers airport entry. The network became simpler, but these are still separate products.

If you use a phone or Navigo Easy

Keep the same phone or pass available until the journey is completely finished. You may need it at an exit gate or during inspection. If you are heading to an airport, buy the airport product before entering the network.