If you get the chance, you should take a visit to Minsk, in Belarus (my wife's Belarussian).
They have 1 flight scheduled every 45 minutes, yet a huge terminal befitting 1 flight every 5 mins. You get to taxy off the active under your own steam, and then they attach a tug and tug you another few hundred yards, then they get a bus and bus you 20 yards to a door in the bottom of the terminal where you then go through passport control (2 aisles) and into a baggage reclaim, both of which look like broom cupboards compared to the rest of the (mostly unused) terminal building.
Highly inefficient from a people-moving perspective, but probably the cheapest way to do it short of opening the doors and giving everyone a parachute!