Notes:

Airports are categorized based on their share of total enplaned passengers: Medium - 0.25%-0.99%.

Description:

This map is included in the Passenger Travel Facts and Figures 2016 publication. 

Source:

U.S. Department of Transportation, Bureau of Transportation Statistics, Air Carrier Airport Activity Statistics and On-time Performance Data, available at www.transtats.bts.gov as of March 2016.