|Average Scheduled Time per Flight||Average Actual Time per Flight|
|All City Pairs||110.1||132.5||117.1||139.5|
|Top 10 City Pairs||115.9||126.6||123.6||134.4|
|Non Top 10 City Pairs||109.8||132.8||116.7||139.8|
|Top 20 City Pairs||117.5||127.3||125.3||135.4|
|Non Top 20 City Pairs||109.5||133.0||116.3||139.9|
|Top 50 City Pairs||121.1||131.8||129.2||140.0|
|Non Top 50 City Pairs||108.5||132.6||115.3||139.4|
NOTE: Any city pair that was in the top 50 for any year from 1990 to 2004 is included. Only carriers reporting Airline Service Quality Performance data are included. Based on a dataset the includes only airports that were in the top 50 for any year from 1990-2004. Only flights with similar characteristics operated in consecutive years for the same month are included. Aggregates will be affected by changes in distance for the underlying flights.
SOURCE: U.S. Department of Transportation (USDOT), Research and Innovative Technology Administration, Bureau of Transportation Statistics (BTS), calculations using the following: USDOT, BTS, Airline Service Quality Performance data, July 2006.