British Airways just announced an awesome promotion where you can earn triple points when flying British Airways and American Airlines, Finnair, and Iberia Airlines as long as the flights are between North American and Europe. The main drawback of the promotion is that only flights booked during this promotional period qualify. And you are limited to the first 8 segments. Aside from that, there are no other exclusions!
This promotion is valid for travel through March 31, 2017. You also must register for the promotion by then.
Thanks to One Mile at a Time for letting me know about this promotion!