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Table 9. International Scheduled Airline Travel on U.S. and Foreign Airlines, 2017-2018

Annual
20172018Change %
Passengers (in millions)223.7233.64.4
Flights (in thousands)1,583.81,621.02.3
Revenue Passenger Miles (in billions)752.6790.55.0
Available Seat-Miles (in billions)933.3968.03.7
Load Factor*80.681.71.0
Flight Stage Length**2,401.12,418.30.7
Passenger Trip Length***3,364.93,384.40.6
Notes: 
* Change in load factor points
** The average non-stop distance flown per departure in miles
*** The average distance flown per passenger in miles
Percentage changes based on numbers prior to rounding.
Source: 

Bureau of Transportation Statistics, T-100 International Market and Segment