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| Dataset: Airline On-Time Statistics and Delay Causes | |
| Scope: US Domestic Flights, All Carriers, All Major Airports | |
| Period: June 2010 - June 2015 | |
| A flight is considered delayed when it arrived 15 or more minutes than the schedule. Delayed minutes are calculated for delayed flights only. When multiple causes are assigned to one delayed flight, each cause is prorated based on delayed minutes it is responsible for. The displayed numbers are rounded and may not add up to the total. | |
| SOURCE: Bureau of Transportation Statistics, Airline Service Quality Performance 234 | |
| URL: http://www.transtats.bts.gov/OT_Delay/OT_DelayCause1.asp |