Question 1

What is DOT T-100 air traffic data?

Accepted Answer

The DOT T-100 data is a comprehensive air traffic dataset published by the U.S. Department of Transportation Bureau of Transportation Statistics. It reports monthly passenger, freight, and mail volumes for all certificated air carriers on both domestic and international routes, broken down by origin airport, destination airport, and carrier — making it the definitive source for U.S. airline traffic analysis.

Question 2

How are enplaned passengers counted at U.S. airports?

Accepted Answer

Enplaned passengers are counted as the total number of revenue passengers boarding aircraft at an airport, including originating, stopover, and transfer passengers. The FAA uses enplanement data to classify airports into hub categories: large hub (1%+ of national enplanements), medium hub (0.25%–1%), small hub (0.05%–0.25%), and non-hub (below 0.05%). This classification drives federal funding allocations under AIP.

Question 3

Where can I find historical U.S. airport passenger data?

Accepted Answer

Historical U.S. airport passenger data is available from several sources: the DOT T-100 database (monthly data from 1990 to present), FAA Terminal Area Forecast (TAF) for historical and projected enplanements, individual airport ACFRs and statistical supplements, and DWU Consulting's air traffic dashboards which aggregate T-100 market passengers and monthly enplaned passenger reports for easy comparison across airports.

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T-100 Market Passengers

Monthly Enplaned Passengers

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