Originally Posted by
PHLGovFlyer
I'm 1K and have had them clear at 96 hours, 62 hours (happened earlier today for a flight late Monday), 23 hours, at the gate, and never.
YMMV
Upgrades clear whenever without a clear rhyme or reason. And there is no way to know if things are even working correctly. I actually find the list that is generated after you check in absolutely useless. I've had several instances where it looked good up until a few minutes before "boarding" only to get moved down and not upgraded. Clearly bogus "transparency."