Originally Posted by
JDS747
On domestic flights it shows on the cleared list once you've cleared, so that could be up to T-96 (several days before check-in). If you don't clear before T-24 you won't show anywhere until you check-in and then, once checked-in, you'll show on the upgrade standby list.
Unless he clears after T-24 but before check-in, which is possible.
But if you have not cleared, you won't be on the list until check-in.