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Airline On-Time Statistics and Delay Causes
Delay Cause Definition  Understand Delay Data   Database Tables  Flight Delays at a Glance
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On-Time Arrival Performance
National (June, 2014)
Most Recent Month      Year to DateView Pie Chart  Print Table  Download Raw Data     
 Number of Operations% of Total OperationsDelayed Minutes   % of Total
Delayed Minutes
On Time361,01071.83%N/AN/A
Air Carrier Delay35,4777.06%2,174,76928.04%
Weather Delay4,5070.90%379,8804.90%
National Aviation System Delay37,1507.39%1,788,82623.07%
Security Delay1640.03%6,4280.08%
Aircraft Arriving Late52,40810.43%3,405,38243.91%
Cancelled10,1332.02%N/AN/A
Diverted1,7680.35%N/AN/A
Total Operations502,617100.00%7,755,285100.00%

A flight is considered delayed when it arrived 15 or more minutes than the schedule (see definitions in Frequently Asked Questions). 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
More Topics:
Flight Delays by Cause
Weather's Share of Delayed Flights
Weather's Share of National Aviation System (NAS) Delays
National Aviation System (NAS) Delay by Cause



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