Difference between a run-on 'hop' sector, as opposed to the main (or only) sector. Returning from Mo Bay to LHR in the late 80s, our 742 (I think) hopped to Kingston and then home. The hop was about 12 minutes I think.
I travelled on those legs a few times but I think the quickest was about 22 mins.
It was a case of "get on, belt up, shut up, sit still, your are not getting fed or watered and no movies"
Overall a very strange trip will all pax and crew just sitting there doing nothing.but great views from low altitude of "Cockpit country" , those odd shaped mountains en route which remains uncharted and impenetrable.