Where does the PHX flight go from? And lounge comparison?
I'm flying LHR-PHX in a couple of weeks, was wondering if this flight generally leaves from T5B or the main building. If it is from B, how do the lounges compare to the main building? Is it worth hanging out in the main complex and getting the shuttle to B at the last minute, or just heading straight to B and chilling out in the lounge there?