Originally Posted by respectable_man
Does anybody know precisely when does the clock start?
If you have connections, how does the window work? Can you book seats for the entire itinerary at the 24hour window for the first flight?
Sorry to drag this thread back up, but I did not see an answer to this question. I checked today, and I was able to select Coach Choice seats for my 2nd leg at the 24 hour mark for my 1st leg. So at least you don't have to wait until 24 hours before your last leg and possibly miss out on a BF upgrade.