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September 2013 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)**
1Southwest3679SepMDW-STL1635282382.1454
2Southwest608SepOAK-PDX1920261869.2364
3Southwest3679SepSTL-EWR1800261869.2371
4Southwest3679SepCLE-MDW1600281967.8645
5Southwest407SepTUS-DEN1525261765.3881
6Southwest3847SepSTL-LAX2030231565.2256
7Southwest608SepSAN-OAK1720301963.3359
8Southwest3578SepDEN-BOS1710271762.9667
9SkyWest5481SepSFO-MCI1219241562.5078
10Southwest194SepOAK-BUR1910261661.5454
11ExpressJet6014SepOMA-DEN173015960.0084
12Southwest160SepPHX-SFO2010201260.0080
13Southwest2433SepLAS-RNO1940271659.2680
14Southwest2433SepONT-LAS1815241458.3358
15SkyWest5487SepMRY-SFO1140301756.6791
16Southwest2007SepMCI-DAL2135231356.5275
17Southwest1791SepLAX-SFO1945251456.0079
18Southwest1366SepSNA-SFO1900241354.1783
19Southwest170SepBWI-CLE1545241354.1751
20SkyWest5323SepCEC-SFO1255261453.85105
21Southwest304SepONT-OAK1735261453.8557
22Southwest4458SepOAK-LAX1720261453.8562
23Southwest2967SepSNA-OAK1535281553.5760
24ExpressJet6014SepDEN-OMA143715853.3381
25SkyWest5606SepPHX-SFO181115853.3378
26Southwest100SepDEN-MCO1725301653.3374
27Southwest407SepDEN-BNA1850301653.3388
28SkyWest5481SepMCI-SFO1822211152.3888
29Southwest1723SepDEN-SLC1810231252.1785
30Southwest4412SepLAX-SFO2150251352.0057
31Southwest1723SepSLC-PHX2000251352.0080
32Southwest513SepSFO-DEN1900251352.0063
33Southwest1723SepPHX-SAN2105251352.0068
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