MAJOR U.S. AIR CARRIER ON-TIME PERFORMANCE
Major U.S. Air Carrier On-Time Performance (monthly data, not seasonally
adjusted)
The number of flights not departing or arriving on time, cancellations,
and diversions are measures of service quality.
These indicators are strongly seasonal and are affected by weather and
heavy demand in winter and summer months, respectively.
| Number of scheduled flights |
463,097 |
442,805 |
| Scheduled flights percent change from same month previous year |
0.62 |
-4.38 |
| Percent of flights not arriving on time |
21.90 |
32.19 |
| Change of flights not arriving on time from same month previous year |
1.25 |
10.29 |
| Percent of flights not departing on time |
17.97 |
31.23 |
| Change of flight not departing on time from same month previous year |
1.25 |
13.26 |
| Percent of cancelled flights* |
2.24 |
20.00 |
| Change of cancelled flights from same month previous year |
-1.07 |
17.76 |
| Percent of diverted flights** |
0.21 |
0.30 |
| Change of diverted flights from same month previous year |
0.04 |
0.08 |
* Also counted in flights not arriving and not departing on time.
** Also counted in flights not arriving on time.
NOTES: The current value is compared to the value from the same period
in the previous year to account for seasonality.
The data cover the 10 largest U.S. air carriers. A scheduled operation
consists of any nonstop segment of a flight. The term “late” is defined
as 15 minutes after the scheduled departure or arrival time. A cancelled
flight is one that was not operated but was listed in a carrier’s computer
reservation system within seven calendar days of the scheduled departure.
A diverted flight is one that left from the scheduled departure airport
but flew to a destination point other than the scheduled destination point.
Data for Aloha Airlines, available beginning in October 2000, and for
American Eagle, available beginning in January 2001, will be excluded
here until one year's data is available to retain comparability with previous
years.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics,
Airline Service Quality Performance data.
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