[photonios]

I am assuming you're flying within the schengen zone.

Can I ask what countries you fly in? I fly frequently within the European Union and I am a EU citizen. However, even for flights between the Netherlands and Germany I have to enter my ID details during check-in and it's checked multiple times throughout the trip.

It's not just random checks, but it seems mandatory. When you drop off the luggage they ask for your ticket + ID. When you board the plane, they again ask for your boarding pass + ID. The exception is large, modern airports such as Munich where you simply scan your boarding pass when boarding the plane.

How do you do this? Do you just refuse?

[skohan]

Maybe this is not general: I am mostly speaking about commuter flights within Germany. Typically I am flying without checked bags and I go straight to security.

I have definitely also flown from Germany to Italy and back without ever showing ID. I can also recall flying from Germany to Shiphol without ID, but I can't recall whether I was controlled on the return flight.

[kalleboo]

Airlines may additionally request ID on their own, many do to prevent ticket reselling.