How Airports Serve Texas
Mark Pearson
This map displays the major airports in and around Texas. 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 5238 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/

DAL serves 3,964,508 people in TX
Dallas Love Field

HOU serves 3,570,529 people in TX
William P. Hobby Airport

DFW serves 3,337,620 people in TX
Dallas-Fort Worth International Airport

IAH serves 3,336,307 people in TX
George Bush Intercontinental Airport

SAT serves 2,361,758 people in TX
San Antonio International Airport

AUS serves 1,800,161 people in TX
Austin-Bergstrom International Airport

GRK serves 1,047,899 people in TX
Killeen-Fort Hood Regional Airport / Robert Gray Army Airfield

SHV serves 936,790 people in TX
Shreveport Regional Airport

ELP serves 811,705 people in TX
El Paso International Airport

MFE serves 806,530 people in TX
McAllen-Miller International Airport

CRP serves 683,374 people in TX
Corpus Christi International Airport

MAF serves 625,875 people in TX
Midland International Airport

LBB serves 531,509 people in TX
Lubbock Preston Smith International Airport

HRL serves 457,561 people in TX
Valley International Airport

AMA serves 419,091 people in TX
Rick Husband Amarillo International Airport

LRD serves 352,617 people in TX
Laredo International Airport

OKC serves 60,554 people in TX
Will Rogers World Airport

AEX serves 41,173 people in TX
Alexandria International Airport

dividing line

2,398 people
closest airport: ELP

2,732 people
closest airport: SHV

4,481 people
closest airport: SHV

closest airport: CRP

closest airport: SAT

closest airport: HOU

closest airport: DAL

closest airport: AMA

closest airport: GRK

closest airport: MFE

closest airport: IAH

closest airport: SHV

15 people
closest airport: DFW

closest airport: MAF

closest airport: DFW

closest airport: AUS

closest airport: HRL

closest airport: LBB

closest airport: ELP

85 people

567 people

closest airport: LRD