Originally Posted by
Aker
The southwestern sun destinations flight pass
I buy a lot of those, since that's where most of my transborder destinations are. Generally, I use eUpgrades at the time of booking, since the Latitude fare allows that and upgrade immediately. Then, at the 48 hour mark, if there is still space available, I will call in and get my eUpgrade cancelled, and then request the complimentary upgrade.
That way I save as many eUps as I can.