Originally Posted by
gates_2
Hi All,
Flying this coming week in WT+ to LHR from DFW. In the past we were able to upgrade from WT to J paying $1000 going from LHR-DFW, but wondering if anyone has had success doing it from DFW on the outbound? The ticket is a paid WT+ seat purchased through the AA.com website, so a call into BA states they can't help with Avios or cash upgrades via the phone and it has to go through AA. Thanks in advance!
Have a look at the wiki in this thread to see what others have reported:
Airport Upgrades (AUP) promotion 2018 thread
It looks like someone reported US$643 last month.