I recently flew 4 segments with Lufthansa, all within the Schengen zone, and they were checking ID at the gate on only 1 out of the 4. In all 4 cases I had checked in online and had no checked baggage. So I'm just curious what the rules/policies are on this.
I know some airlines always check for ID, but this was the same airline. I've had that experience with Norwegian, too: no ID check on the outbound leg of the trip, but then an ID check on return. (So one may leave his country of residence without ID and then get stranded overseas!)
So clearly it's not just a per-airline policy. Does anyone know what determines whether an ID check at the gate is done or not? Does it depend on the country of departure/arrival? On the airport? How much the flight is delayed?