Originally Posted by
cxfan1960
Booking class probably doesn't matter. I flew HKG-SFO on subclass I last month, and was upgraded to F at the gate.
Yeah, I got an op-up on an AA-booked U ticket on BOS-HKG the weekend before Christmas as a (now lowly) partner OWE. I'd just switched onto the flight less than 2 days out--surprised I was able to bag a U seat when J and/or lower cabins ended up being overbooked!