Originally Posted by
WilcoRoger
Agree, it's YMMV - but the odds are it'd be OK. Depends on the OP, what kind of odds are acceptable.
For AB TXL-Scandinavia, the odds are very high that no ID would be checked when flying between the two counties, at least if doing carry-on-only luggage and self check-in on the AB phone app. I'm batting 100% no ID checks by anyone for AB flights from TXL to Denmark or Sweden; and about 100% no ID checks for AB flights from Denmark to Germany. It's Sweden to Germany that is more the wild card, and primarily with what the airline/ground service reps at ARN -- that is where inconsistency in practice would be most evident if evident at all when flying AB.