Upgrade Biz to First on BA with RTW Done3 issued by AA?
I'm travelling on a Done3 issued by AA.
Is it possible to upgrade with AAMiles from Biz to First on a BA coded and operated flight JFK-LHR?
AAdvantage are saying that's it not possible, as it's not a valid D fare, which appears to contradict the language on the website...
"Full-Fare Business with published fares booked in J, D or R on American and C, J, D or R on British Airways or Iberia."