How Airports Serve Connecticut
Mark Pearson
This map displays the major airports in and around Connecticut. 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 828 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/

BDL serves 1,854,842 people in CT
Bradley International Airport

HPN serves 839,961 people in CT
Westchester County Airport

ISP serves 546,967 people in CT
Long Island MacArthur Airport

PVD serves 297,625 people in CT
Theodore Francis Green State Airport

SWF serves 34,702 people in CT
Stewart International Airport

dividing line

5,448 people
closest airport: ISP

3,659 people
closest airport: BDL

3,606 people
closest airport: HPN

closest airport: HPN

closest airport: PVD

closest airport: BDL

closest airport: ISP

closest airport: SWF