Originally Posted by
mehitabel
... As data point, I called the premiere desk and was told waiver changes can be made up until the time of departure. So I guess the question is if I'm feeling lucky....
Depending on what you mean by departure, that is a bit of an oversimplification. Once the GA closes the flight, I believe you can not be removed from the flights -- but you should be boarded by that time.
So, a better phrasing would be as long as boarding is occurring, you are OK. Note the GA can cancel your reservation at T-15 (domestic) if you are not boarded. However, the GA may hold off VDB until after T-15, so you may have to make a decision before VDB is confirmed.