How Airports Serve North Carolina
Mark Pearson
This map displays the major airports in and around North 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 2175 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/

CLT serves 2,364,754 people in NC
Charlotte/Douglas International Airport

RDU serves 2,083,795 people in NC
Raleigh-Durham International Airport

GSO serves 1,683,837 people in NC
Piedmont Triad International Airport

FAY serves 900,553 people in NC
Fayetteville Regional Airport (Grannis Field)

AVL serves 678,735 people in NC
Asheville Regional Airport

EWN serves 520,064 people in NC
Coastal Carolina Regional Airport (was Craven Co. Regional)

OAJ serves 423,113 people in NC
Albert J. Ellis Airport

ILM serves 347,543 people in NC
Wilmington International Airport

ORF serves 175,506 people in NC
Norfolk International Airport

TRI serves 134,040 people in NC
Tri-Cities Regional Airport (Tri-Cities Regional TN/VA)

TYS serves 64,963 people in NC
McGhee Tyson Airport

MYR serves 64,154 people in NC
Myrtle Beach International Airport

GSP serves 56,271 people in NC
Greenville-Spartanburg International Airport (Roger Milliken Field)

PHF serves 23,658 people in NC
Newport News/Williamsburg International Airport

RIC serves 14,497 people in NC
Richmond International Airport (Byrd Field)

dividing line

2,052 people
closest airport: CLT

5,538 people
closest airport: RDU

2,976 people
closest airport: CLT

closest airport: EWN

closest airport: CLT

closest airport: GSO

closest airport: ILM

closest airport: OAJ

closest airport: RDU

closest airport: AVL

closest airport: FAY

closest airport: TRI

closest airport: MYR

closest airport: TYS

1 people

962 people

closest airport: ORF

688 people

closest airport: GSP