Montana - Average Distance to Nearest Airport

This page presents statistics and a map.
See information on how and why they were computed.

40.95 mi. = mean distance of a person to his or her nearest major airport
Percent of population within a given distance of a major airport:
PercentileDistance (mi.)
10th percentile2.99
25th percentile5.53
50th percentile (median)17.37
75th percentile65.43
90th percentile95.42

This map displays the major airports in and around Montana. It shows how the state can divided according to which airport is the closest as the crow flies.

The flags are a sample of 271 census tracts (of 271 tracts total) within the state.

On the above map, 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.

989,415 = total population of Montana
Table of most useful airports: (i.e., the airports that are the closest major airport for the most people)
Airport Code Number of People for whom this is their closest airport
Billings Logan International AirportBIL229,297
Great Falls International AirportGTF205,374
Missoula International AirportMSO193,639
Bozeman Yellowstone International AirportBZN184,394
Glacier Park International AirportGPI143,672
Bismarck Municipal AirportBIS28,989
Rapid City Regional AirportRAP4,050


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Thanks for the Maps Icons Collection for the icons used in the embedded map image above.
© Mark Pearson 2012