Originally Posted by
LeisureFirst
As for the actual question, expertflyer is not at all reliable when it comes to availability, especially longhaul on BA. One explanation I've heard is that it shows US and not UK availability and for some strange reason these aren't the same. The worse I've seen was during a recent CW sale when expertflyer showed something like "J9 C9 D3 R0 I0" whereas there were absolutely tons of I-class seats still going on ba.com.
I use EF.
Granted,I've not compared availability on it with other sources..But I have found it's seat map and deductions from that to be very accurate.
Without fail on a booking,it has almost instantly seated us where we were put on a new BA booking and also reseated us elsewhere when we've changed seats.