Originally Posted by
747FC
One of the nice benefits, which you may not be able to advantage, is free upgrades on inter-island flights at T-24 hr.
Also, Plats get two complimentary upgrade certificates annually that can be used on HNL-North America flights. (At least to California, as that is where I have used them.)
I think I should have qualified for Platinum based on 40,000 BIS miles this year. How soon can I expect to receive those upgrade certificates? I sure they're good for JFK-HNL nonstop flights!

Can I use them to upgrade at time of ticket purchase or is there a time limit?(i.e. T-24 or T-72)