Originally Posted by palciparum

Another question, LHR to DFW in may 2025, on EF I see
AA51 U0 C0
AA21 U0 C0
AA79 U0 C0
AA81 U0 C0

but AA (BA) 6950 always shows C7 for any date that I put (whether it's January or March or May). If I book through AA, I can upgrade using AA miles, but how do I confirm upgrade availability on AA (BA) 6950?

I think when I check on EF for upgrade space for non AA flights, whether it’s IB or BA choosing AA as airlines, its gives wrong information.

so how do I find available upgrade space on IB and BA non stop flights when booked through AA?