Upvote:0
I haven't tried doing this online. However, my advice is to call the BA agent, and check which seats are available in any seat class that you're looking for.
This is what I have done whenever I want to preview the seats and see how full is the flight without purchasing the ticket. The advantage to this, is that the agent can also put a hold on your flight for 24 hours without purchase so that the price of the ticket won't change if you decide to do additional research over the next 24 hours.
Upvote:1
Alright, I have an answer. I was doing my search using the multi-city option, because I didn't see the via PHL route in the list of flights. However, I did the search again, clicking on the "more flight options" instead and it works - allows you to select seats. Using the multi-city option is apparently what screws things up.