At POR, it either stops at South, West, North, East then on to POFQ (so 5). Or it may do POFQ first and then the POR's.
Depends on when and where. At MK it seems POFQ had it's own bus, so that would do it for you.
Oftentimes East is last on the way back if sharing a bus, sometimes South at POR is last, if POR and POFQ are sharing a bus, POFQ seems to be dropped off first.
At AoA it looks like you actually queue up for which park you are going to at the main lobby area.