I was wondering if there is a way to transfer AA miles to SPG points? I'm generally fly Delta but recently have had to take a few trips with American to get down to Dallas. I doubt I'll accumulate enough miles to ever get a free ticket and was wondering if there is a way for me to get SPG points for my miles. I know there is a points for miles program for SPG but have not been able to find info for the other way around.

If not SPG, are there any other programs to which I could transfer my miles?

Thanks!