Say you're going from point A to point B and the only [reasonable] way to get there is by airplane (eg an island to mainland). Pretend your group is LARGE (at least 12 people)
Is there a breaking point where you should give a try at looking for a charter flight as opposed to booking such a large group in a commercial airline?, or, (I don't know if this is common practice) would commercial airlines have like a wholesale fare for this type of situations, thus making it more accessible than chartering a flight?