Used Kayak last year to purchase tickets to France, using code share partners Delta and Air France well in advance. No real problems.
Used Kayak this week to check out multi-trip pricing, premium economy (Nashville to Zurich; Paris to Nashville for return), and saw something we could afford with American Airlines/ British Airlines. Started the process, and saw I'd have to make seat choices for outgoing flight through British Air. Called AA, was told "everything will be fine, just pay for tickets, here's the trip code, now go to British Air."
Did that, whereupon I discovered BA charges you for seating assignments. And not a niggling amount, either. (This is for the overnight leg, where one wants to sit next to one's partner, and have the legroom purchased with premium economy.)
So what was supposed to be a $2900 round trip ticket for two became a $3200 round trip ticket. I'm irritated because this feels like deceptive marketing. I've written BA, filed a complaint with the U.S. Department of Transportation, and am in the process of filing a complaint with American. I realize this is experience, but was there anyway I could have researched this beforehand? Any advice out there for me? Thank you.