Monthly data, not seasonally adjusted
Airline revenue passenger miles (RPM) are a measure of intensity of use of the air travel system. In 2008, the 740 million passengers traveling on U.S.-based airlines collectively traveled 805 billion miles. On average, a passenger traveling domestically went 836 miles for each flight. An international passenger traveling on a U.S.-based airline traveled an average of 2,713 miles to the first destination outside the U.S.
|U.S. Airline Revenue Passenger Miles||Sep-08||Sep-09|
|Scheduled System (Domestic and International) U.S. Airlines Total RPM (billions)||59.75||60.06|
|Percent change from same month previous year||-6.98||0.51|
NOTE: The current value is compared to the value from the same period in the previous year to account for seasonality.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information, available at http://www.bts.gov/programs/airline_information/ as of December 2009.