Originally Posted by
buckeyefanflyer
Some states like Ohio have almost no intra state air travel flight. Loss of hubs at CVG and CLE did not help as had several routes. At one tons these routes had flights
CLE-CMH
CLE- DAY
CLE-TOL
CLE-MFD
CLE-CVG
CMH-CVG
DAY-CVG
CAK-CVG
TOL-CVG
Many states like Michigan and PA have better intra service thanks to hubs in the state.
A lot of those are a short distance.
With today security measures (=time) driving point to point is better for many. More so if the real destination to/from an airport is some distance away.
As a guess some of those were feeder flight to longer flights
(CVG airport is in Kentucky)
A map from Great Circle Mapper - Great Circle Mapper