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The Biggest Single Cause of Flight Delays Are ...

Did You Know?

November 18, 2007

Photo of an airport terminal

According to the U.S. Department of Transportation's Bureau of Transportation Statistics, the biggest single cause of flight delays are aircraft arriving late (38.2%). Security delays account for only 0.2% of flight delays.

Security delays are defined as "delays or cancellations caused by evacuation of a terminal or concourse, re-boarding of aircraft because of security breach, inoperative screening equipment and/or long lines in excess of 29 minutes at screening areas.

According to past statistics, starting in 2003, security delays have never been above 0.3%.

  • Click here for more information from the Bureau of Transportation Statistics.