Where to?
If US, it might be better to arr at airport bit earlier, as there is one final check at the gate, where they do further checks.
Even with OLCI, sometimes, you might see the words "this is not a boarding pass, please see staff at the airport of departure"/words to this effect.
But at least with QF, you can use the J queue, which tends to be a bit better than Y.
Man/Woman with ipad asking more questions, not that I have been to the US, but from what I could tell from 2 gates away at SYD int a few years ago, I was going to NZ, the UA flight gate, they were putting up screens, maybe even opening sus HLO.
If SIN/HKG, etc, yes 3 hrs is enough.
QFi J lounge in Aust capital cities have no wow factor, but worth it for some grub and grog.
