How Airports Serve Pennsylvania
Mark Pearson
This map displays the major airports in and around Pennsylvania. 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 3210 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/

PHL serves 3,697,850 people in PA
Philadelphia International Airport

PIT serves 2,747,696 people in PA
Pittsburgh International Airport

MDT serves 2,031,154 people in PA
Harrisburg International Airport

ABE serves 1,614,814 people in PA
Lehigh Valley International Airport

UNV serves 1,019,460 people in PA
University Park Airport

AVP serves 875,444 people in PA
Wilkes-Barre/Scranton International Airport

ERI serves 508,453 people in PA
Erie International Airport (Tom Ridge Field)

ELM serves 109,358 people in PA
Elmira/Corning Regional Airport

BGM serves 33,264 people in PA
Greater Binghamton Airport (Edwin A. Link Field)

BUF serves 26,917 people in PA
Buffalo Niagara International Airport

IAD serves 19,411 people in PA
Washington Dulles International Airport

SWF serves 13,422 people in PA
Stewart International Airport

CAK serves 5,136 people in PA
Akron-Canton Regional Airport

dividing line

4,370 people
closest airport: PIT

2,345 people
closest airport: MDT

4,176 people
closest airport: PIT

closest airport: PIT

closest airport: PHL

closest airport: ABE

closest airport: AVP

closest airport: MDT

closest airport: UNV

closest airport: ERI

869 people

closest airport: ELM

928 people

closest airport: SWF

884 people

closest airport: IAD

closest airport: BUF