Domestic Flights: Air Passengers
Domestic Air Seat and Passenger Miles (monthly data, not seasonally adjusted)
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Revenue passenger-miles are a measure of the volume of air passenger transportation. Unused seat-miles (the difference between available seat-miles and revenue passenger miles) are used as a measure of airline capacity utilization. Another measure is the intensity of use of the equipment.
NOTE: A revenue passenger-mile is equal to one paying passenger carried one mile. Available seat-miles for an individual flight are the number of seats multiplied by the distance traveled. The data include both transborder and foreign flights by large U.S. carriers, but not include any flights by foreign carriers.
Available seat-miles
(billions) |
56.73 |
60.78 |
Percent change from same
month previous year |
4.71 |
7.13 |
Revenue passenger-miles
(billions) |
41.44 |
44.38 |
Percent change from same
month previous year |
4.05 |
7.09 |
Unused seat-miles
(billions) |
15.29 |
16.39 |
Percent change from same
month previous year |
6.55 |
7.23 |
NOTES: The current value
is compared to the value from the same period in the previous year to account
for seasonality. The data have been
adjusted to have a standard 30-day month by multiplying the data for each
month by the ratio: 30/(actual days in
month).
The dramatic changes in the September 2001 data reflect the
impact of the terrorist attacks on Sept. 11, 2001, on aviation, including
several days in which commercial air operations were suspended.
The data reported here excludes small-certificated and commuter
carriers that began reporting T100 data in 2002 for comparalility with
previous issue.
SOURCE: U.S. Department
of Transportation, Bureau of Transportation Statistics, Air Carrier Traffic
Statistics Monthly, as of April 2005.
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