Q. What is the difference between T-100 Market and T-100 Segment Airline Traffic Data?



  • Passenger is "enplaned" and is counted only once as long as they remain on the same flight number
  • Market data is used by the Bureau of Transportation Statistics (BTS) for passenger, freight or mail totals


  • Passenger is "transported" and is counted for each leg of the trip
  • Segment data numbers tend to be higher than those in the market data, except for international flights


250 people take a flight from JFK (Point A) to BWI (Point B). 200 passengers deplane and the other 50 passengers, along with 70 additional passengers, continue on to MIA (Point C), where all passengers deplane.


  • Point A to Point B are counted as one market of 200
  • Point A to Point C would be counted as another market of 50 
  • Point B to Point C would be a market of 70 people


  • Point A to Point B would be counted as one segment of 250 
  • Point B to Point C would be counted as another segment of 120
  • A passenger from A to B to C would be counted for both legs

Comparison of Market and Segment Data




 A to B



 B to C



 A to C


 No Segment


Other Resources

BTS Data

  • Last Updated Feb 28, 2018
  • Views 1993
  • Answered By Victoria Milam

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