Figure 3-4 - Average Monthly Number of Delays by Cause: July 2003-January 2004

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NOTES: Flights are on time if they depart from or arrive at the gate less than 15 minutes after their scheduled departure or arrival times. See table 3-4 in appendix B for definitions of categories of delay.

SOURCE: USDOT, BTS, “Causes of Flight Delays,” available at http://www.bts.gov/oai, as of March 2004.