Flying EZE-MIA-LAX-DEN in paid J for the EZE-MIA (772) and MIA-LAX (772) legs. I called AA as soon as I made the reservation and put myself of the UG list for the international portion to F, which would then apply to the domestic, as well. However, if the international UG doesn't come through I'd still like to try for F on MIA-LAX using "stickers", but my reservation shows the upgrade for that flight as N/A, even though it's a three-class a/c and I'm in J. Called AA and they said that the international upgrade will apply to domestic flight etc etc. but that they couldn't put me on the list for J to F on the domestic leg. Is this a case of keep calling back until I get the answer I want, or is it true? You can buy Y, J and F for the MIA-LAX flight, so I would presume you could upgrade from J to F, as well. AA.com only addresses using 500-mile UGs for Y to F, so maybe they just don't apply in this situation?