Originally Posted by
Sinead2000
What is Quad S????
Extra security screening.
Although it could equally be they need to see your documentation, including Covid results.
Originally Posted by
LondonElite
Perhaps on AA, but I flew LHR-US many many times, and almost always checked in online. I don't even know where the UA desks in T2 are!
Completely irrelevant now with Covid. Not to mention you were flying a carrier that had already scanned your passport.