Originally Posted by
Jon Baker
BA sell the fares on the basis that the highest allowance applies to the whole trip - even when that includes a return trip which is on a different carrier (even one which isn't even an IAG subsidiary).
They made this fact very clear to me just this afternoon - and its backed up by the OPs clear screenshot of the same (though I'm not one to take info on MMB as certain any day of the week)...
That said, no doubt the OP will suffer the cyclical "speak to the other carrier" argument when trying to reclaim the fee they have paid.
Where does BA make the claim that the highest allowance will apply regardless of carrier ... especially where it is a mileage based upgrade? On
http://www.britishairways.com/en-gb/...age-allowances , that higher allowance is only specified for travel on BA and not in the section to do with "Allowances on other airlines"
Under DOT regulations which would be applicable, the allowance will have been printed on the ticket. If the passenger received a new ticket receipt with a new allowance, then that would suffice ; otherwise the allowance that IB granted seems to be spot on to what the ticket stated