Product name: 

OUIGO FLEX, a service that allows you to change the date and/or time of your train journey

Description: 

For just €7 on top of the price of your ticket, you can sign up for OUIGO FLEX and change the time and/or date of your journey up to 30 minutes before the train departs. Enjoy peace of mind knowing that whatever happens, you can adapt your plans.

Web: 

https://www.ouigo.com/es/preguntas-frecuentes?thematic=reservar