Major U.S. Air Carrier On-time Performance

Major U.S. Air Carrier On-time Performance

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Date Cancelled Diverted Depart Late Arrive Late Operations Trend for Arrive Late
Sep-87 0.90 0.20 13.66 22.91 427,570 25.30
Oct-87 0.67 0.19 11.52 19.61 448,620 24.85
Nov-87 1.23 0.26 15.45 23.84 422,803 24.83
Dec-87 2.61 0.43 25.11 33.49 440,403 24.81
Jan-88 3.61 0.53 23.00 30.65 436,950 24.04
Feb-88 1.77 0.31 17.88 25.24 412,579 22.68
Mar-88 0.70 0.24 14.13 21.10 445,080 21.34
Apr-88 0.56 0.25 11.86 17.33 427,325 20.61
May-88 0.60 0.25 12.79 18.03 435,916 19.86
Jun-88 0.28 0.22 10.72 15.62 431,299 18.90
Jul-88 0.62 0.33 13.47 18.46 441,118 18.89
Aug-88 0.55 0.28 12.35 17.04 446,769 18.93
Sep-88 0.48 0.19 8.77 14.37 424,075 19.41
Oct-88 0.52 0.19 11.11 16.60 441,670 20.09
Nov-88 0.84 0.25 15.35 22.34 420,861 20.78
Dec-88 1.06 0.31 17.21 23.86 438,454 20.79
Jan-89 1.60 0.39 16.85 23.32 440,022 21.51
Feb-89 2.05 0.37 20.40 27.58 395,176 22.85
Mar-89 5.25 0.31 24.11 30.38 435,181 23.66
Apr-89 0.51 0.17 11.22 16.61 405,604 23.27
May-89 0.61 0.27 13.53 20.54 416,160 23.76
Jun-89 0.92 0.35 20.43 27.82 406,293 24.38
Jul-89 0.71 0.30 16.35 23.13 417,166 24.23
Aug-89 0.63 0.21 18.16 25.37 426,085 24.30
Sep-89 1.25 0.21 14.28 20.39 415,068 24.07
Oct-89 0.96 0.23 14.60 20.54 437,134 23.66
Nov-89 0.84 0.25 15.79 21.98 417,821 23.18
Dec-89 2.16 0.46 24.22 29.80 429,490 22.71
Jan-90 1.70 0.41 16.77 22.40 442,700 21.89
Feb-90 1.95 0.41 20.41 26.78 396,926 22.04
Mar-90 1.31 0.31 17.41 23.46 444,320 21.63
Apr-90 0.46 0.19 11.03 17.79 433,420 21.28
May-90 0.59 0.23 11.37 19.16 447,371 21.01
Jun-90 0.61 0.29 12.94 19.94 437,395 20.51
Jul-90 0.71 0.29 12.48 18.94 455,057 20.31
Aug-90 0.67 0.29 14.68 21.46 457,886 20.42
Sep-90 0.78 0.25 9.97 15.59 435,638 20.24
Oct-90 0.65 0.23 11.15 17.58 455,047 20.11
Nov-90 0.47 0.22 10.24 15.43 428,781 19.78
Dec-90 2.16 0.54 23.66 29.70 436,352 20.25
Jan-91 2.21 0.38 19.85 26.17 427,264 19.75
Feb-91 1.59 0.34 13.58 18.15 387,120 18.70
Mar-91 0.93 0.24 13.95 19.99 429,314 18.45
Apr-91 0.68 0.25 11.59 16.62 422,196 18.30
May-91 0.61 0.23 11.26 16.50 430,116 17.79
Jun-91 0.41 0.23 9.93 14.72 424,589 16.89
Jul-91 0.49 0.22 10.70 15.51 441,122 16.75
Aug-91 0.50 0.18 11.24 16.73 441,583 16.90
Sep-91 0.52 0.14 7.46 12.10 417,757 17.06
Oct-91 0.81 0.28 10.80 16.61 433,382 17.35
Nov-91 0.92 0.23 11.35 17.28 402,937 16.98
Dec-91 0.71 0.25 15.30 20.04 419,545 16.19
Jan-92 1.48 0.30 12.85 18.61 425,458 15.84
Feb-92 0.80 0.20 11.16 16.57 396,469 15.91
Mar-92 1.28 0.30 13.75 19.10 426,851 16.46
Apr-92 0.52 0.20 8.53 13.40 416,271 16.79
May-92 0.46 0.14 8.11 13.45 425,558 17.25
Jun-92 0.42 0.19 12.12 18.96 425,510 17.96
Jul-92 0.60 0.29 13.50 20.22 440,210 18.63
Aug-92 0.98 0.20 13.91 19.66 442,131 18.89
Sep-92 0.84 0.17 9.75 14.81 422,574 18.91
Oct-92 2.22 0.14 9.94 14.19 435,690 18.82
Nov-92 0.89 0.18 11.87 17.32 409,266 19.07
Dec-92 1.92 0.39 19.69 26.11 426,169 19.42
Jan-93 1.79 0.28 17.06 22.37 422,755 19.43
Feb-93 2.03 0.27 17.52 23.15 383,950 19.86
Mar-93 3.88 0.34 20.69 26.39 432,980 20.08
Apr-93 0.82 0.16 11.48 17.08 420,051 19.09
May-93 0.42 0.13 7.74 12.89 430,185 17.89
Jun-93 0.72 0.25 11.10 16.75 424,599 17.23
Jul-93 0.46 0.16 8.89 13.94 436,269 16.98
Aug-93 0.54 0.16 10.75 15.88 441,745 17.56
Sep-93 0.68 0.18 9.93 15.37 416,357 18.53
Oct-93 0.61 0.16 11.36 16.96 428,476 19.12
Nov-93 1.25 0.16 14.00 18.82 407,900 19.40
Dec-93 1.04 0.19 16.47 21.39 425,234 19.47
Jan-94 4.86 0.40 24.52 29.53 423,861 20.38
Feb-94 4.37 0.37 21.15 26.17 386,954 20.14
Mar-94 1.20 0.20 13.72 17.44 435,516 18.97
Apr-94 0.59 0.20 12.29 16.97 420,995 18.57
May-94 0.38 0.15 8.27 12.37 436,432 17.88
Jun-94 0.63 0.27 13.08 18.23 426,490 17.86
Jul-94 0.86 0.29 15.39 20.55 443,736 18.11
Aug-94 0.54 0.25 11.87 16.25 451,086 17.80
Sep-94 0.41 0.13 8.14 12.05 430,861 17.84
Oct-94 0.49 0.16 10.06 14.07 449,369 18.17
Nov-94 0.62 0.20 14.42 19.25 428,227 18.67
Dec-94 0.97 0.21 17.22 20.75 446,521 18.63
Jan-95 3.07 0.29 21.61 26.17 464,933 19.39
Feb-95 2.38 0.18 17.14 21.09 418,312 19.59
Mar-95 1.59 0.16 16.51 20.70 461,503 20.04
Apr-95 1.32 0.17 14.18 18.70 441,074 20.62
May-95 1.43 0.18 14.42 19.32 448,341 21.02
Jun-95 1.32 0.21 18.30 24.06 439,423 21.10
Jul-95 1.29 0.24 16.25 19.92 449,856 20.86
Aug-95 1.66 0.22 16.66 20.15 457,423 20.98
Sep-95 1.16 0.11 10.96 14.42 429,774 21.29
Oct-95 1.09 0.15 14.06 17.91 448,017 22.13
Nov-95 1.47 0.19 18.52 22.15 427,091 23.18
Dec-95 2.87 0.26 28.38 32.34 441,688 24.05
Jan-96 6.62 0.44 31.51 37.33 447,224 32.75
Feb-96 3.47 0.33 23.56 28.10 420,265 24.19
Mar-96 1.98 0.21 20.16 24.06 449,569 23.84
Apr-96 1.27 0.17 15.52 19.82 436,007 23.69
May-96 1.57 0.22 16.51 21.08 448,923 23.88
Jun-96 1.81 0.28 20.43 25.33 443,311 24.06
Jul-96 2.04 0.26 20.03 24.71 458,376 24.44
Aug-96 1.72 0.25 20.02 25.31 462,294 24.89
Sep-96 1.76 0.21 15.97 21.31 438,352 25.24
Oct-96 1.74 0.25 17.24 22.81 456,577 25.33
Nov-96 2.19 0.24 17.44 22.09 435,088 25.20
Dec-96 2.70 0.32 28.63 33.37 455,997 25.37
Jan-97 3.95 0.32 25.81 31.59 459,123 24.80
Feb-97 2.07 0.20 19.63 24.79 415,656 23.63
Mar-97 1.81 0.21 17.84 21.90 460,986 22.72
Apr-97 1.58 0.19 15.99 20.15 447,294 22.24
May-97 1.13 0.17 13.04 16.84 457,361 21.66
Jun-97 1.51 0.32 18.59 23.86 450,737 21.60
Jul-97 1.69 0.28 17.71 22.50 466,771 21.57
Aug-97 1.48 0.23 17.32 21.44 466,608 21.48
Sep-97 1.43 0.17 11.32 14.97 444,431 21.45
Oct-97 1.64 0.13 14.24 18.45 459,247 21.82
Nov-97 1.55 0.20 16.62 21.78 432,725 22.17
Dec-97 1.82 0.26 21.36 26.46 450,904 22.07
Jan-98 3.07 0.28 20.10 24.95 452,001 22.14
Feb-98 2.54 0.25 19.09 24.61 412,832 22.59
Mar-98 2.14 0.25 19.74 24.15 459,703 23.05
Apr-98 1.57 0.22 16.60 20.88 442,644 23.43
May-98 2.09 0.21 18.27 22.52 449,293 23.83
Jun-98 2.88 0.40 24.53 29.58 446,427 23.87
Jul-98 2.02 0.23 18.30 21.14 462,429 23.12
Aug-98 3.16 0.25 19.38 22.97 465,910 23.13
Sep-98 7.41 0.15 18.56 21.06 443,901 23.25
Oct-98 1.71 0.19 14.72 18.25 457,954 22.65
Nov-98 1.47 0.15 13.62 16.71 436,528 22.29
Dec-98 2.18 0.34 23.11 26.78 455,099 22.78
Jan-99 5.85 0.45 28.05 32.34 453,814 23.50
Feb-99 3.48 0.19 17.86 21.09 417,627 22.99
Mar-99 2.66 0.22 18.63 21.91 466,267 23.49
Apr-99 1.98 0.24 18.95 24.27 450,620 24.57
May-99 2.57 0.25 18.84 23.81 462,054 25.10
Jun-99 2.75 0.35 23.32 29.12 460,467 25.31
Jul-99 3.14 0.35 24.02 28.93 474,047 25.26
Aug-99 2.44 0.23 19.77 23.89 479,549 24.56
Sep-99 3.31 0.17 16.72 20.65 460,251 24.13
Oct-99 2.04 0.13 16.46 19.94 478,294 23.31
Nov-99 1.68 0.16 15.84 18.59 454,950 22.45
Dec-99 1.74 0.19 18.42 22.00 469,944 21.97
Jan-00 5.21 0.28 21.74 26.25 470,477 22.73
Feb-00 3.42 0.24 21.11 25.24 444,499 23.57
Mar-00 2.12 0.21 19.27 23.01 482,944 24.49
Apr-00 2.51 0.22 20.26 24.63 463,263 25.97
May-00 3.45 0.28 21.66 25.75 478,909 27.17
Jun-00 3.95 0.34 28.89 33.66 471,100 28.08
Jul-00 3.21 0.27 25.69 29.69 483,342 28.31
Aug-00 3.05 0.28 25.44 30.04 491,366 28.54
Sep-00 2.24 0.21 17.97 21.90 463,097 28.52
Oct-00 2.13 0.19 19.83 23.93 485,761 28.86
Nov-00 2.35 0.18 22.95 27.38 461,855 29.59
Dec-00 6.00 0.31 33.80 37.59 475,398 30.26
Jan-01 3.78 0.19 21.44 24.77 524,536 22.77
Feb-01 3.66 0.30 22.87 27.34 472,928 23.17
Mar-01 3.38 0.17 21.80 24.85 525,632 23.02
Apr-01 2.23 0.18 17.76 20.80 508,843 22.58
May-01 1.78 0.16 15.49 18.59 524,305 21.96
Jun-01 2.98 0.32 21.29 24.86 514,448 21.55
Jul-01 2.10 0.22 19.00 21.94 532,406 21.07
Aug-01 2.46 0.29 20.21 23.91 538,439 20.77
Sep-01 20.34 0.29 31.63 32.51 485,616 37.79
Oct-01 1.54 0.17 14.82 15.18 439,574 18.86
Nov-01 1.08 0.16 13.46 15.29 417,386 17.97
Dec-01 1.01 0.14 17.70 19.78 429,869 17.14
Jan-02 1.54 0.11 15.16 18.97 400,287 16.88
Feb-02 0.98 0.10 12.30 15.10 366,148 16.92
Mar-02 1.11 0.17 17.61 21.19 410,597 17.97
Apr-02 0.83 0.16 13.53 17.13 401,304 18.40
May-02 0.84 0.13 13.54 17.06 412,269 18.47
Jun-02 1.52 0.23 18.15 21.14 411,875 18.24
Jul-02 1.34 0.24 17.71 20.34 465,572 18.06
Aug-02 1.14 0.18 15.00 17.38 466,764 17.75
Sep-02 0.86 0.12 10.01 12.05 429,996 17.72
Oct-02 1.02 0.11 12.43 15.82 446,583 17.76
Nov-02 0.89 0.11 11.58 14.80 415,004 17.42
Dec-02 1.72 0.22 18.92 21.66 427,103 17.12
Jan-03 1.51 0.15 13.55 16.68 552,083 16.92
Feb-03 4.00 0.24 19.22 23.46 500,184 17.57
Mar-03 1.71 0.17 14.01 17.43 559,248 17.25
Apr-03 1.20 0.12 10.82 13.14 526,874 17.09
May-03 0.81 0.14 11.60 15.04 533,277 17.24
Jun-03 0.78 0.19 14.07 17.62 536,114 17.29
Jul-03 1.40 0.22 16.49 20.30 558,064 18.06
Aug-03 1.64 0.27 16.76 20.97 556,522 18.78
Sep-03 1.46 0.15 11.08 14.36 527,347 19.10
Oct-03 0.92 0.13 10.58 13.61 552,013 19.24
Nov-03 1.40 0.19 15.02 19.79 527,814 19.96
Dec-03 2.10 0.15 19.65 23.95 555,068 20.07
Jan-04 3.02 0.17 20.29 25.13 582,998 20.48
Feb-04 1.71 0.13 17.97 22.50 552,976 20.45
Mar-04 1.27 0.15 15.27 18.71 600,629 20.44
Apr-04 0.77 0.11 13.85 16.95 582,300 21.09
May-04 1.75 0.28 18.23 22.36 593,722 22.07
Jun-04 1.50 0.29 22.58 26.99 587,752 22.27
Jul-04 1.65 0.26 20.88 24.01 613,326 22.09
Aug-04 1.63 0.20 18.65 21.69 622,739 21.98
Sep-04 3.07 0.18 14.14 16.06 584,580 22.13
Oct-04 1.10 0.14 15.58 18.98 609,403 22.40
Nov-04 1.26 0.18 17.83 20.83 583,593 22.71
Dec-04 2.82 0.23 25.49 28.40 605,755 22.82
Jan-05 4.22 0.30 24.80 28.59 594,326 22.83
Feb-05 1.74 0.16 18.83 22.36 544,760 22.06
Mar-05 1.65 0.14 20.17 23.02 616,865 21.77
Apr-05 1.27 0.13 14.06 16.52 593,954 21.37
May-05 0.96 0.14 14.14 16.29 614,330 21.47
Jun-05 1.63 0.23 21.87 24.74 608,447 22.19
Jul-05 2.21 0.32 26.02 28.99 626,964 23.12
Aug-05 2.14 0.29 21.99 24.75 630,027 23.13
Sep-05 2.01 0.14 15.07 17.33 574,106 22.91
Oct-05 1.77 0.12 16.64 18.73 592,505 22.66
Nov-05 0.99 0.16 17.07 19.93 565,773 22.62
Dec-05 1.90 0.19 25.88 29.06 563,001 22.53
Jan-06 1.68 0.24 18.98 21.22 580,996 22.14
Feb-06 2.13 0.25 21.51 24.68 530,993 22.65
Mar-06 1.25 0.17 21.42 23.85 603,197 23.21
Apr-06 1.07 0.18 19.16 21.49 579,898 23.84
May-06 1.17 0.21 19.52 21.74 597,479 24.32
Jun-06 1.69 0.30 24.67 27.19 592477 24.71
Jul-06 1.80 0.32 25.08 27.36 614637 25.36
Aug-06 1.64 0.26 22.66 25.46 622180 26.11
Sep-06 1.71 0.21 19.68 23.90 579622 27.24
Oct-06 1.96 0.21 23.36 28.46 606228 27.69
Nov-06 1.64 0.18 20.16 23.63 580881 27.17
Dec-06 3.11 0.24 27.78 30.34 599175 26.78
Jan-07 2.62 0.20 24.17 27.93 596622 26.91
Feb-07 4.17 0.21 27.11 30.66 542180 27.36
Mar-07 2.75 0.21 25.85 28.58 612931 27.58
Apr-07 1.88 0.19 21.94 25.15 589552 27.76
May-07 1.14 0.24 19.63 23.40 606495 27.88
Jun-07 2.88 0.37 30.14 33.68 603564 28.36
Jul-07 2.26 0.36 29.46 32.94 622449 28.42
Aug-07 1.97 0.35 27.63 30.80 626370 27.93
Sep-07 1.03 0.16 15.64 18.28 575226 26.90
Oct-07 1.15 0.17 19.30 22.93 603939 26.53
Nov-07 1.04 0.15 17.71 20.22 580452 26.34
Dec-07 3.41 0.24 31.47 36.16 590467 26.91
Jan-08 2.79 0.21 24.01 27.62 578889 26.54
Feb-08 3.33 0.28 25.65 29.46 544456 26.48
Mar-08 2.59 0.26 25.77 29.10 593556 26.27
Apr-08 1.70 0.17 18.93 22.30 576157 25.56
May-08 1.04 0.14 18.00 21.41 584081 24.97
Jun-08 1.83 0.38 25.76 29.90 587159 24.49
Jul-08 1.78 0.32 23.47 25.78 606163 23.58
Aug-08 1.67 0.28 20.43 22.39 590823 22.73
Sep-08 1.66 0.12 11.99 13.77 520054 22.18

NOTES: The current value is compared to the value from the same period in the previous year to account for seasonality. Data are available for those carriers that had at least 1% of domestic enplanements in the previous year. The last 25 months of data include only carriers that reported in each of the last 25 months to retain comparability. Earlier data includes all reporting carriers.

A scheduled operation consists of any nonstop segment of a flight. The term "late" is defined as 15 minutes after the scheduled departure or arrival time. A cancelled flight is one that was not operated but was listed in a carrier's computer reservation system within seven calendar days of the scheduled departure. A diverted flight is one that left from the scheduled departure airport but flew to a destination point other than the scheduled destination point.

A trend line has been provided for flights not arriving on-time. The trend has been calculated through a statistical procedure called Structural Modeling, in which the time series under study is decomposed into seasonal, trend and irregular components. For further information on this statistical procedure, see: S.J. Kiipman, et al., Structural Time Series Analyzer, Modeler and Predictor (STAMP), London: Timberlake Consultants Ltd., 2000.

The dramatic changes in the September 2001 data reflect the impact of the terrorist attacks on September 11, 2001, on aviation, including several days in which commercial air operations were suspended.

Certain flights originating at O'Hare airport and operated by American Airlines (181flights in April 2002) and United Airlines (256 flights in April 2002) between April 24, 2002 and May 8, 2002 are not included in the calculations due to the participation of these carriers in a pilot test program for enhanced baggage screening. A list of affected flights is available from BTS.

SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Airline Service Quality Performance data as of November 2008.