Originally Posted by
zman
You get zero /zero if you fly BA from the U.S.
No, you'd get 25% of the London - Spain miles, but nothing for the transatlantic portions. You can earn EQM/P on Iberia transatlantic, but also at a reduced rate (30%) for most coach tickets.
In addition to the link provided above, go to the AA wiki (link in the Unofficial User's Guide sticky.)