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March 2011 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)**
1Southwest141MarSNA-SFO1445171164.7195
2Southwest1686MarSFO-LAX2155171164.71122
3Continental541MarBOS-EWR1850221463.6471
4Southwest3431MarPHX-SFO2105271762.9681
5Delta1287MarDTW-PDX202213861.5449
6Frontier661MarDEN-SFO181513861.54153
7SkyWest6263MarFAT-SFO1127311961.2988
8Southwest1460MarSAN-SFO1025181161.1175
9JetBlue425MarBOS-PBI1855271659.2681
10JetBlue278MarSFO-FLL2130171058.82107
11Southwest1589MarSNA-SFO1920171058.82103
12Southwest501MarPHX-SMF2035171058.8258
13Southwest3058MarBWI-BUF2120171058.8277
14Southwest2969MarDAL-ELP2045171058.8265
15Southwest42MarMDW-STL2140171058.8268
16JetBlue526MarMCO-EWR1747311858.0685
17Southwest987MarLAX-SFO2015311858.06111
18ExpressJet2348MarSTL-EWR1345191157.8980
19SkyWest6974MarSFO-ASE1550211257.1453
20ExpressJet3029MarEWR-DCA215016956.2580
21Atlantic Southeast5175MarCLE-ATL1840271555.5695
22Southwest688MarSNA-SFO945201155.0085
23American610MarDFW-BOS1815311754.8486
24Atlantic Southeast4980MarATL-CLE2034311754.8475
25Atlantic Southeast5062MarATL-BMI2108311754.8487
26JetBlue980MarTPA-BOS1510311754.8463
27Atlantic Southeast5063MarATL-OMA1500261453.8578
28JetBlue1329MarBOS-BWI203017952.94100
29Southwest1473MarSFO-SAN214517952.9498
30Southwest2553MarSFO-LAS214517952.94100
31Southwest797MarSAN-PHX211017952.9475
32Southwest3140MarSFO-PHX204517952.94101
33Southwest994MarTUS-ABQ182517952.94102
34Southwest3230MarSFO-DEN195517952.94102
35Southwest529MarMDW-JAN182017952.9498
36Southwest200MarAUS-FLL142517952.9493
37SkyWest6818MarTUS-SFO1056191052.6391
38Southwest609MarPHX-SFO1730191052.6398
39Atlantic Southeast5175MarATL-CLE1620271451.85114
40Atlantic Southeast5096MarAGS-ATL1813271451.8552
41ExpressJet3130MarIND-EWR1725271451.8586
42JetBlue691MarBOS-DCA2040271451.8581
43JetBlue1440MarLGB-SFO2016271451.8593
44SkyWest6661MarMOD-SFO1744271451.8559
45SkyWest6378MarSFO-COS1615271451.8555
46American1226MarMIA-LGA2010311651.6172
47American1939MarMIA-MCO2230311651.6166
48Atlantic Southeast5022MarLEX-MEM1220311651.6198
49Continental702MarEWR-SFO1545311651.6175
50JetBlue511MarEWR-FLL2145311651.61115
51SkyWest6870MarMMH-SFO1738311651.6165
52SkyWest6426MarSFO-SMF1119311651.6183
53SkyWest4691MarLAX-SFO1815311651.6181
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