Originally Posted by
KARFA
What selling class are you booked in on the flight? You can only upgrade with avios on AA if booked in to selling classes J, C, D and Y. If you are in I class on your AA1 flight then it won't be possible to UuA.
I hadn't realised C and D classes worked, too - I thought it was just J. Is that just for transcon? Always useful to keep in the back of my mind in case I end up in D class one day!