I beleive we (former Mesaba guy) used to do the shortest flight ever. It was from Evansville, IN to Owensboro, KY. It was blocked (off - on) at 6 minutes. In a SAAB! Literally was a parabolic arc to 2500 ft, and back down to a straight in final. The whole highspeed was from DTW to Evansville to Owensboro. You could imagine trying to get that leg done even faster to get minutes more sleep. The whole leg was blocked at something like 15 minutes.

And yes, I know some of you are thinking, could the SAAB even climb to 2500 in 6 min? Remember, it was nighttime, usually with cooler air.