Dumb question, but I have more than enough miles in my US Air account yet need more AA miles to qualify for a free international flight with them. The US Airways website says that you can, "You can earn Dividend Miles on American flights and use Dividend Miles to book award travel on American." but it doesn't say how. Do I have to call AA or US Air up? I usually just book free flights directly through the airline I have the miles with, so I don't know much about alliances and transfers of miles between airlines etc. Any advice would be greatly appreciated!