Q: Can a group of 4 people share the Bonotren 10 ticket from Barcelona Airport to Sitges? Can we use the Bonotren 10 ticket from Sitges to Barcelona Sants?
A: The Bonotren 10 is a ticket valid for 10 trips that can be used by several people. The ticket is valid for ninety days starting from the date the ticket is validated.
Yes, you can use the Bonotren 10 for each passenger at a time. As long as all passengers travel at the same time with same origin and destination. One journey is validated on the ticket for each passengers traveling on it.
However, there are no direct trains from Barcelona Airport to Sitges. You will have to make two journeys if you are going from Barcelona Airport to Sitges. You will take the Renfe train R2 Nord from the airport and get off at El Prat de Llobregat station. From there you can catch a train to Sitges. Therefore, you will use the Bonotren 10 twice for two journeys. Barcelona Airport to El Prat de Llobregat station then El Prat de Llobregat to Sitges.
You can then use the Bonotren 10 ticket again from Sitges to Barcelona Sants.