Interrail allows you travel throughout Europe. However, some trains require an additional reservation. This Interrail reservation is not included in your Interrail pass. As a result you will get your own seat on the train, no matter how busy it is. Like an airplane!
In general all slower trains, Suburban and Regional, do not require any additional reservation. Therefore you can just board the train and sit wherever you like. For the more luxurious options, such as the High-Speed Trains and Night-Trains an additional seat reservation is almost always required.
When you start your Interrail journey these additional costs may come as surprise. Don’t worry! But keep in mind that there are always slower alternatives available, which do not require any reservations. Also, by going for the luxury options you will save a lot of travel time. It’s up to you too choose!
You should make Interrail reservations as far in advance as possible, because trains can become full! Luckily there are always other options available if no reservation can be purchased. Thus, below you can find a page per country with an extremely detailed lists of all trains. There you will find whether a reservation is required and if so what the costs would be. Most of the time you can also buy the reservation online. Otherwise you have to purchase it at the train station.
Interrail friendly countries (most trains are free of additional costs).
Bosnia and Herzegovina
Back to the Interrail Guide