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On-Time Performance - Flight Delays at a Glance
Year: 2005



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MonthOntime ArrivalsOntime (%)Arrival DelaysDelayed (%)Flights CancelledCancelled (%)DivertedFlight Operations
January424,71571.39%143,31624.09%25,0844.22%1,808594,923
February423,06277.58%111,89720.52%9,5051.74%868545,332
March475,10576.94%131,38421.28%10,1691.65%882617,540
April496,04283.44%90,13715.16%7,5321.27%781594,492
May514,42783.67%93,61915.23%5,8770.96%879614,802
June458,11475.20%139,74222.94%9,9161.63%1,423609,195
July445,34070.92%166,76726.56%13,8512.21%2,003627,961
August474,21275.16%141,43122.42%13,4522.13%1,809630,904
September474,67082.66%87,23515.19%11,5322.01%816574,253
October481,60981.26%99,90416.86%10,4751.77%724592,712
November453,08280.03%106,54318.82%5,5860.99%927566,138
December406,39571.01%154,09026.92%10,7511.88%1,107572,343
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2005 (Annual)5,526,77377.40%1,466,06520.53%133,7301.87%14,0277,140,595
* For purposes of this report, a flight is considered delayed if it arrived at (or departed) the gate 15 minutes or more after the scheduled arrival (departure) time as reflected in the Computerized Reservation System. ** 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, 21 in 2006 and 20 in 2007 (See Reporting Carriers by Year). Major Carriers 1997-Present refers to the 8 major carriers that reported for all those years. They are Alaska Airlines, 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. America West Airlines stopped reporting in 2006.
*** Effective January 2006, data of the merged operations of US Airways and America West Airlines are combined, and appear only as US or US Airways data in the flight delay tables.