Originally Posted by
flybie
I’m thinking of booking premium economy tickets then use flying blue miles to upgrade....Can I use FB to upgrade on delta?
No you can't use your FB miles directly with DL
regardless of carrier , if you book with AF then you can only contact flying blue to make/arrange upgrade using your miles . You can give a try but your chances are pretty low
Originally Posted by
flybie
AF is not as nice as delta
you need to check on which plane you might fly