Data are taken from January 2015. Times are reported in local time using a 24 hour clock
Data Retrived from Office of the Assistant Secretary for Research and Technology (OST-R);U.S. Department of Transportation (US DOT); Terry Therneau, Beth Atkinson and Brian Ripley (2013).
http://www.transtats.bts.gov/DL_SelectFields.asp?Table_ID=236&DB_
Short_Name=On-Time
US Airline Carriers
Source:
http://i26.tinypic.com/2ppbpy9.jpg