Originally Posted by
Kiwi Flyer
That very much depends on the program. Some have such high upgrade costs (and require such high booking classes to be eligible for upgrades) as to be extremely poor value - a business/first award may even require less miles (as well as saving $$$$).
UA consistently has F saver awards for less miles than coach standard awards. Not only that, availability on F saver exists, does not exist on coach saver but does on coach standard. It does not take rocket science to book the F if that is the way you have to go.