With the flexible fare, you are not bound to a specific train. A ticket for an ICE or any other long-distance train of the ICE product class lets you use all long-distance trains (e.g. ICE, RJ, RJX and IC/EC) on the booked route and day, as well as local and regional trains (e.g. IRE, RE, RB and S-Bahn). A ticket for the IC/EC product class lets you use all IC/EC trains on the booked route and day as well, as local and regional trains (e.g. IRE, RE, RB and S-Bahn).

Note: If you want to use an ICE train with your IC/EC ticket, you will need to buy an upgrade. The price of the upgrade is equal to the difference between the IC/EC fare and the ICE fare for the route of your ticket.