Domestic Flights: Air Passengers
Domestic Air Seat and Passenger Miles (monthly data, not seasonally adjusted)
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) |
59.49 |
56.86 |
| Percent change from same month previous year |
-6.62 |
-4.42 |
| Revenue passenger-miles (billions) |
14.18 |
11.63 |
| Percent change from same month previous year |
-6.46 |
-18.01 |
| Unused seat-miles (billions) |
45.31 |
45.24 |
| Percent change from same month previous year |
-6.67 |
-0.16 |
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).
These indicators are components of the passenger and overall aircraft
load factors displayed in ?Aircraft Utilization?Passengers and Freight."
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.
Refer to the Special Notes at http://www.bts.gov/oai/indicators/top.html
for specific concerns regarding the preliminary nature of the most recent data
for latest issue of Air Carrier Traffic Statistic Monthly.
SOURCE: U.S. Department of Transportation, Bureau of Transportation
Statistics, Air Carrier Traffic Statistics Monthly, November 2003.
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