Originally Posted by guv1976

If you are an AARP member (or are willing to become one), I would consider booking the trip with BA. AARP members get a $200 discount off of roundtrip, trans-Atlantic Business Class fares on BA. And, if you get the Chase/BA credit card, you get a 10% discount off of such fares. (My understanding is that the two discounts are stackable.)

The outbound flights would be BA codeshares operated by AA, although I'm not seeing connections via DFW on the cheapest BA fares.

If you were to credit the four segments to BA's frequent-flyer program, you would end up with oneworld Ruby status, which would you get a few nice benefits if you were to fly AA in Economy following your return from Europe.