How to activate your DiscoverEU Flex Pass? 13 November 2023 15:21 Updated Related articles Can I change the start of my 1-month Pass validity period or cancel a travel day? How to get your Pass ready to board the train? What is the difference between a flexible (FLEX) and fixed (FIX) travel option? Where can I see all the discounts and offers available? How can I plan my trip with the DiscoverEU Travel App?