Hello everyone, I have a question. I am doing the AA challenge and I booked my ticket with AA but the flight is a BA plane. I am flying Premium economy (which is BA World Traveler +). My question is if I decide to buy a day of flight upgrade to BA business how will my EQD be calculated. The reason why I ask is because I bought my ticket with AA so AA calculates it buy how much I spent not including taxes and if I pay for a day of upgrade with BA then they calculate it my 25% of the miles flown, I think.
Thanks