<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by missydarlin:
Actually...yes you can. Both Airlines belong to points.com which allows you to exchange miles, but its about a 10:1 exchange. The value of 5000 American miles is worth 523 Alaska miles according to their exchange calculator.
https://points.com/calculator.jsp
</font>
Actually, NO YOU CAN'T. While you can trade miles for various AWARDS with other airlines, you cannot combine mileage. There is no way to take your AAdvantage miles and transfer them to your Mileage Plan account, or vice-versa.