How Airports Serve Ohio
Mark Pearson
This map displays the major airports in and around Ohio. It shows how the state can divided according to which airport is the closest as the crow flies.
The flags are a sample of 500 census tracts (of 2943 tracts total) within the state.
Some census tract flags may look like they are colored for one airport's region but are actually in another airport's region. The census tract flags are colored with which airport they are closest to as the crow flies along the surface of the earth (the Haversine distance formula). The region boundaries that are displayed on map were computed assuming assuming the earth is flat. (The lines that divide regions are a Voronoi diagram, and I couldn't find any algorithm that calculate the lines on a sphere such as the earth.) In short, although a few census tracts may look like they're mislabeled near a boundary, it's actually the boundary that is slightly wrong.
For more information, see the full report:
http://www.mark-pearson.com/airport-distances/

CMH serves 2,596,835 people in OH
Port Columbus International Airport

CLE serves 2,404,292 people in OH
Cleveland-Hopkins International Airport

CAK serves 1,844,012 people in OH
Akron-Canton Regional Airport

CVG serves 1,511,720 people in OH
Cincinnati/Northern Kentucky International Airport

DAY serves 1,504,500 people in OH
James M. Cox Dayton International Airport

DTW serves 717,908 people in OH
Detroit Metropolitan Wayne County Airport

FWA serves 313,535 people in OH
Fort Wayne International Airport

PIT serves 290,793 people in OH
Pittsburgh International Airport

CRW serves 247,096 people in OH
Yeager Airport

ERI serves 105,813 people in OH
Erie International Airport (Tom Ridge Field)

dividing line

3,577 people
closest airport: PIT

1,054 people
closest airport: CAK

4,417 people
closest airport: CLE

closest airport: CLE

closest airport: CMH

closest airport: CAK

closest airport: CVG

closest airport: DTW

closest airport: DAY

closest airport: PIT

closest airport: ERI

closest airport: CRW

closest airport: FWA

969 people