T-100 Market Revenue Enplaned Passengers

Understanding DOT T-100 Airline Traffic Data

The Bureau of Transportation Statistics (BTS) T-100 Market dataset captures revenue enplaned passengers on every domestic and international route served by U.S. and foreign carriers. Unlike airport-reported monthly enplanement data, T-100 breaks traffic down by origin, destination, and carrier — making it essential for analyzing airline market share, route concentration, and competitive dynamics at individual airports.

Why T-100 Data Matters for Airport Finance

Airport revenue depends on which airlines fly where and how many passengers they carry. T-100 data reveals the origin-and-destination (O&D) versus connecting traffic split, which directly affects cost per enplanement and airline willingness to pay higher landing fees and terminal rents. Credit rating agenciesscrutinize carrier concentration — airports where a single airline controls over 50% of enplanements face higher credit risk if that carrier reduces service. The T-100 dataset, updated quarterly with a roughly 6-month lag, serves as the definitive source for these analyses across all U.S. commercial airports.