Major U.S. air carriers - percentage of cancellations 2000-2020

A cancelled flight is one that was not operated, but was listed in a carrier's computer reservation system within seven calendar days of the scheduled departure. The number of carriers reporting beginning in 2010 is 18. The number of carriers reporting in 2008 and 2009 is 19 (20 through February 2008, after which Aloha Airlines ceased reporting). During 2005 to 2007, 20 air carriers reported on-time performance data, including all major U.S. carriers (carriers with at least one percent of total domestic scheduled-service passenger revenues) and other carriers that reported voluntarily. The number of carriers reporting in previous years is as follows: 2015 (13 after the merger of American and U.S. Airways in June); 2014 (14); 2013 (16); 2012 (15); 2011 (16); 2004 (19); 2003 (18); 2002 (10); 2001 (12); 2000 (11)