List the main cities you're planning to visit.

For example, you start from London and planning to visit Paris, Amsterdam and Berlin.

Check via Interrail map or Interrail route builder if there are other interesting points or cities on your route you'd like to visit.

Travelling from Paris to Amsterdam you could visit Antwerpen and Lille.

Plan your nights:

• which cities do you plan to stay for one or couple of days and need a hotel?
• do you plan to use overnight trains?

You could stay for a couple of days in Amsterdam and Berlin, and use an overnight train from Berlin to Vienna.

How do you start your journey from your place of residence and how are you coming back?

The Interrail pass includes an outbound and an inbound trip that allows you to travel by train from your place of residence to the border - free of charge (except of possible reservation fees for the train type you use). Because Interrail is not valid in your country of residence. Of course you can also fly to your first destination. It's possible to start with Interrail from London to Paris and back by night train from Venice to Paris on to London.

Calculate the quantity of days you're going to use Interrail transport (it doesn't matter how many trains you'll change during a travel day), including way up to the border and back. It's the "travel days" you need.

1 day: Berlin - Amsterdam
2 day: Amsterdam - Antwerpen, Antwerpen - Lille, Lille - Paris
3 day: Paris - Berlin
Total: 3 travel days.
Best choice - 3 days in 1 month flexi pass.