How long is the flexible fare Europe ticket valid?

• Tickets for international routes of up to 100 kilometres are valid for one day. This applies to both one-way and return tickets.
• Tickets for international routes of over 100 kilometres are valid for two days. The journey must start on the first day of validity.
  If the outward and return journeys are booked as a single ticket, this ticket is valid for a total of two days. This means you must start the return journey on the same day of the outward journey. We recommend booking one ticket per direction if necessary.
  If the outward and return journeys are booked as two separate tickets, each ticket is valid for two days.

Please note:
If your outward and return journeys are no more than two days apart, you will get one ticket for both journeys.
If your outward and return journeys are more than two days apart, you will receive one ticket for each journey.