How Airports Serve Oklahoma
Mark Pearson
This map displays the major airports in and around Oklahoma. 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 1046 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/

OKC serves 1,996,827 people in OK
Will Rogers World Airport

TUL serves 1,256,514 people in OK
Tulsa International Airport

XNA serves 243,485 people in OK
Northwest Arkansas Regional Airport

DAL serves 74,811 people in OK
Dallas Love Field

ICT serves 64,492 people in OK
Wichita Mid-Continent Airport

DFW serves 45,222 people in OK
Dallas-Fort Worth International Airport

AMA serves 39,547 people in OK
Rick Husband Amarillo International Airport

SHV serves 30,453 people in OK
Shreveport Regional Airport

dividing line

3,352 people
closest airport: TUL

4,573 people
closest airport: XNA

1,465 people
closest airport: TUL

closest airport: TUL

closest airport: OKC

closest airport: SHV

closest airport: DAL

closest airport: XNA

578 people

closest airport: ICT

closest airport: AMA

935 people

closest airport: DFW

130 people