Bureau of Transportation Statistics (BTS)
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Table 1
Summary of Airline On-Time Performance Year-to-date through May 2004

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Year Operations Late Arrivals Late Departures Cancelled Diverted Percent On-Time Arrivals Percent Late Arrivals Percent Late Departures Percent Cancelled Percent Diverted
1995 2,234,163 426,324 331,719 43,825 4,399 78.76 19.08 14.85 1.96 0.20
1996 2,201,988 502,607 406,704 65,671 5,975 73.92 22.83 18.47 2.98 0.27
1997 2,240,420 463,971 366,146 47,335 4,911 76.96 20.71 16.34 2.11 0.22
1998 2,216,473 463,011 365,440 50,556 5,380 76.59 20.89 16.49 2.28 0.24
1999 2,250,382 476,034 386,926 74,265 6,105 75.28 21.15 17.19 3.30 0.27
2000 2,340,092 500,379 408,685 78,095 5,770 75.03 21.38 17.46 3.34 0.25
2001 2,583,010 515,657 434,022 76,081 5,101 76.89 19.96 16.80 2.95 0.20
2002 2,171,954 364,252 293,507 26,612 2,947 81.87 16.77 13.51 1.23 0.14
2003 2,672,742 403,833 320,031 48,543 4,332 82.91 15.11 11.97 1.82 0.16
2004 2,916,702 561,557 450,041 49,561 4,925 78.88 19.25 15.43 1.70 0.17

NOTE: The number of reporting carriers has varied as follows:
1995: 10
1996: 10
1997: 10
1998: 10
1999: 10
2000: 11
2001: 12
2002: 10
2003: 18
2004: 19

SOURCE: Bureau of Transportation Statistics, Airline On-Time Data