The number of flights arriving on time is a measure of service quality. This indicator is strongly seasonal and is affected by weather and heavy demand in winter and summer months, respectively. The data cover those airlines that enplaned at least 1% of demestic passengers in the previous year, and have also reported for at least two consecutive years. A scheduled operation consists of any nonstop segment of a flight. An on time flight arrives within 15 minutes of the scheduled arrival time.
|Flights not arriving on time (percent)||17.34||23.78|
|Percent change from same month previous year||7.77||37.14|
NOTES: The current value is compared to the value from the same period in the previous year to account for seasonality.
The information is based on data submitted by reporting carriers. The number of reporting carriers varies as follows: 10 from 1997 to 1999, 11 in 2000, 12 in 2001, 10 in 2002, 18 in 2003, 19 in 2004, 20 in 2005, and 19 in 2006. Major Carriers 1997-Present refers to the 9 major carriers that reported for all those years. They are Alaska Airlines, America West Airlines (1997-2005), American Airlines, Continental Airlines, Delta Air Lines, Northwest Airlines, Southwest Airlines, United Airlines, and US Airways. American Eagle Airlines and ATA Airlines are not included because they did not report for the full period.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Airline Service Quality Performance data, November 2006.