How Airports Serve South Carolina
Mark Pearson
This map displays the major airports in and around South Carolina. 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 1091 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/

GSP serves 1,349,400 people in SC
Greenville-Spartanburg International Airport (Roger Milliken Field)

CAE serves 1,084,665 people in SC
Columbia Metropolitan Airport

CHS serves 746,006 people in SC
Charleston International Airport / Charleston AFB

MYR serves 569,189 people in SC
Myrtle Beach International Airport

CLT serves 378,578 people in SC
Charlotte/Douglas International Airport

AGS serves 223,459 people in SC
Augusta Regional Airport at Bush Field

SAV serves 208,100 people in SC
Savannah/Hilton Head International Airport

FAY serves 65,004 people in SC
Fayetteville Regional Airport (Grannis Field)

AVL serves 963 people in SC
Asheville Regional Airport

dividing line

4,315 people
closest airport: CHS

4,382 people
closest airport: GSP

6,951 people
closest airport: CLT

closest airport: CAE

closest airport: CLT

closest airport: GSP

closest airport: AGS

closest airport: CHS

closest airport: FAY

closest airport: MYR

closest airport: SAV

997 people

871 people

555 people