Someone once told me the turnaround time on a 737-200 was 7 man hours... so 1 guy can do it in 7 hours, 7 guys in 1, 14 in 30 minutes, notice, this includes all paperwork, passenger unloading and loading, cleaning, baggage, fueling, walkaround, etc...
So counting the normal gate crew for a typical 737 class airliner:
2 Flight crew
3 Flight Attendants
1 ground mechanic
1 "blue tanker"
1-3 cleaners (rare nowadays)
1-3 Customer Service agents (yes i count them too, they do have parts to play)
thats at least 14, yes i realise some of those positions might not be present at all airports, but still its an interesting point...
Also another point, alot of airlines do not do full turns at outstations, instead they double stock the flight at the hub for the return trip. They may also not dump the lavs, take on as much fuel (they will overtank at the hub, depending on weight allowances of course) or do a complete cleaning. This is especially true of regional flights. Whenever i see a Jazz Dash 8 here, 15 minutes is a typical turn, and ive seen it done in less. Engine shutdown, Pax and bags off, fuel, bags on, pax on, paperwork done. Engine Start... no catering, no cleaning besides what the F/A can do in that time. Then again, YYZ
-YYB is only a 50 minute flight each way.
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.