Wirelessly posted (BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
No, you cannot use AA miles for anything on ba.com: not domestic U.S. flights, not domestic U.K. flights, and not international flights. You can only redeem AAdvantage miles at AA's redemption rates, and only at aa.com, or by phoning AA.