Originally Posted by
jonsg
Don't forget: if your existing terminal's set up for A320s, and the new terminal can handle A380s, you're going to do a lot better than double your capacity!
It's a "how-long-is-a-piece-of-string" question as to how a new terminal affects the airport's peak flows.
Au contraire: you may or may not double the terminal's passenger-handling capacity, but you will more than double the number of passengers who are trying to squeeze into that capacity.