Originally Posted by
raehl311
If frequent upgrades are your priority, then you should fly DL. Just don't be upset when your miles are not worth anything.
So what is the best airline choice if what you want is not free upgrades or cash upgrades but mileage upgrades? I want to use my accumulated miles for upgrades and know that I'm going to get the upgrade at the time that I book. After 7 years flying CO (preceded by 10 years and >1M miles on AA out of ORD), I'm now free to choose between any of the NYC area airlines: DL, JetBlue, AA, and CO/UA. Any suggestions?