Originally Posted by
Rickers
Mornin M-UK1
There is no facility to convert Airmiles into BA Miles, but have you considered booking 1 flight using the BA Miles, and the 2nd flight using your Airmiles ?
Airmiles offers less flexibility for sure, but all taxes/fees/charges are included, and they have different reward availability from mainline BA on some flights.
Just a thought (and welcome aboard)

Thanks Rickers! Unfortunately I have tried that one, they have no availability either and do not even offer reward options for the AA flights, full payment only.