The chance is not good. CX only op-ups when overbooked. SFO-HKG Y is not often full these days. Even if it is overbooked, there are enough people getting mileage upgrades that op-up chance is very slim these days.
As AA EXP, you can get seat assignments ahead of time.
Last edited by cxfan1960; Oct 24, 2008 at 8:59 am
Reason: I meant SFO-HKG Y is not often full.