Originally Posted by
pulpfiction78
Is it not that you can apply an RUC or GUC on a flight up until T-3, but they can clear at any point in time, before gate is closed, after having been applied?
This is my understanding. In fact, they're supposed to clear at the gate if there are any open premium cabin seats, regardless of inventory bucket availability. It could be the case that before T-3, instrument supported upgrade inventory is required for the upgrade to be confirmed.