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September 2016 Regularly Scheduled Flights with More than 50% Delayed Arrivals of More than 30 Minutes

RankCarrierFlight NumberMonthOrigin-DestScheduled Departure TimeNumber of Operations (minimum of 10 per month)Number of Flight Operations Not Arriving On-Time*Percent of Flight Operations Not Arriving On-Time*Average Number of Minutes of Delay (30 min late flights only)**
1United1202SepBOS-EWR1915201365.0083
2Frontier522SepDEN-CLE1535231460.8778
3Southwest3099SepBOS-STL1855261557.6980
4Frontier1045SepPHL-IND181013753.85127
5Southwest1534SepBWI-BOS1730251352.0072
6Southwest2462SepSMF-SEA1915251352.0054
Notes: 

* Includes canceled and diverted flights

** For flights late more than 30 minutes only.  Excludes canceled and diverted flights

Source: 

Bureau of Transportation Statistics, Airline On-Time Data