Originally Posted by
flyerCO
Just to make sure, you're not trying to upgrade an award ticket? I know should be fairly obvious this isn't allowed, but there's plenty of people that don't understand this.
If there's no OY space then only option is t use miles to pay cost difference.
It's paid with cash/CC.
Also, to all who responded - Thanks. But I called 2 more times with the advice given, and the answer is the same: Pay the fare difference. Maybe I need to wait until the "Upgrade with Miles" stop showing up as an option when I pull up my flights on Delta's site/app?