Do I need a reservation?
A reservation is needed for most high-speed, international and night trains. Usually reservations are not required for local and regional trains. It’s possible to book train reservations from 90 days (and in some cases 60 days) prior to your travel date.
During the busy summer season (May - September) we recommend you make reservations as far in advance as you can. It’s also a good idea to reserve a seat if you need to get to your destination on a specific day and time, for example to catch a flight or if you’re travelling as a group and want to sit together.