What is a multi-destination ticket?

You have a multi-destination ticket if you are departing from a different city from the one you arrived in or if you are leaving to a different city from the one you left from.

Examples : 
Departure from Paris to Pointe-à-Pitre and then puis Return flight from Fort-de-France to Paris. 
or
Departure from Paris to Pointe-à-Pitre and then return flight from Pointe-à-Pitre to Lyon.
or
Departure from Paris to Fort-De-France and then return flight from Pointe-à-Pitre to Nantes.

To purchase this type of ticket, perform the following steps when you have selected the flight search:

• click on "multi-flight" button located next to "round trip" and "one way".
• Fill in your exact flight plan by half route (first route, then second route) and then let yourself be guided. 

You will then proceed to the usual booking steps.