We want to fly to LHR around Sept 4, return home around 9-21. A couple of days either way is doable . We will fly on to Toulouse and spend a couple of weeks in the Dordogne area. Then return home, maybe spending 3-4 nights in London first. ( Or stay in London before going on to France.)

I looked at Premium economy and business class. According to the BA website, there is no possibility of reward seats in either class out of Seattle till the end of October, and that seems to extend more every time I check the site.

I am looking at Toulouse mainly because the companion ticket award apparently cannot be used on any partner airline.