Originally Posted by
jamespvg
You can just have them change to AA once inside the Admirals Club. (If you hold on to your original boarding pass — e.g., on your phone — you won't have trouble with priority boarding, either.)
That's good to hear. With DL, you generally can't change your FF after check-in. Not without having to deal with an agent who would then automatically print you a new boarding pass to reflect the change.