Back in the early 90's I used to do a TPA/FFL/MIA connection. The FFL/MIA flight was a airport reposition around 5:30 in the evening but a published flight. Distance was listed as 17 miles (real DL plane) and time was a function of which way you took off and landed-ranged 9-18 minutes.Upgrading to F would could rack up some serious mileage under the old rules doing that several times a week. You could the reverse too by a MIA/PBI/TPA.