It's most convenient if you check in using your airline's app or website online. If you only have hand baggage, then you can head directly to the security control. If you have hold baggage, you can check it in at the drop-off counters in the terminals.

Nevertheless, please arrive at the terminal from which your flight leaves at least two hours before departure.

You can also do this at the counter when at the airport, if perferred. Your booking documentation states the terminal from which your airline will fly. Upon opening of BER you will be able to find out where your check-in counter is either on this website by clicking on flight information or on the on-site monitors.

Some airlines allow you to check in at self-service kiosks. Simply hand in your hold baggage at a drop-off desk afterwards. 

Some airlines will offer evening check-in at BER. We will inform you on our website of the actual airlines offering this service in time.