Originally Posted by
BigChiefToiletPaper
To better answer your question, Using reward miles for overseas upgrades would definitely be a goal as well. I don’t know that I would use miles stateside so much.
Cross airline ffp upgrades would need serious research. That is uncommon with ffp's.
For example Star Alliance has a cross airline upgrade system that has onerous t&c's and needs a high priced based fare: totally useless for most people.