Originally Posted by guv1976

You can redeem Etihad Guest miles on AA, but not on BA. And Etihad now charges for each AA flight flown, so if you will have a connecting-flight itinerary on AA, Etihad is probably not the way to go.

It would be helpful if you could post your exact itinerary. Redeeming BA Avios for trans-Atlantic or trans-Pacific flights will typically incur high cash surcharges.

Have you verified that AA is offering Business "MileSAAver" award seats on your routes for the dates you want? Only MileSAAver award seats can be booked with partner miles.