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Most delayed airlines at Houston George Bush Intercontinental Airport (IAH)

  • Most delayed airlines at Houston George Bush Intercontinental Airport (IAH)
    1/ Jaromir Chalabala // Shutterstock

    Most delayed airlines at Houston George Bush Intercontinental Airport (IAH)

    Winter weather is one of the most reliable heralds of flight delays. And Avery, the first winter storm of 2018, was no exception. The storm contributed to 2,558 cancellations and 8,215 flight delays on its first day, with lingering effects on subsequent days. Weather is one cause of flight delays categorized by the U.S. Department of Transportation's Bureau of Transportation Statistics, part of a broader set of conditions known as the National Aviation System. The system also includes airport operations, heavy traffic volume, and air traffic control. Extreme weather is in its own category and covers real and forecasted blizzards, tornadoes, and hurricanes.

    Delays also are caused by air carriers and include problems with maintenance and crews, baggage loading, fueling, and aircraft cleaning. Security and safety issues that many people complain about—waiting in security lines for more than 29 minutes, broken equipment, and evacuation of aircraft—are others. Late-arriving aircraft scheduled for a trip later is the last type of delay the government tracks.

    Some flights have more problems than others, and Stacker analyzed data from the Bureau of Transportation Statistics to determine which flights out of your city’s airport have the worst records. Stacker ranked airlines by overall on-time performance for all arriving flights in August 2018. We also included the total number of the airlines’ flights out of the airport and their overall on-time percentage.

    Flying out of IAH sometime soon? Take a look at the list to see if it’s likely that your trip will go as scheduled or that you’ll spend more time in the terminal than you had planned before heading to your destination.

    ALSO: Most popular U.S. flights out of Houston George Bush International

  • #12. Endeavor Air Inc.
    2/ airlines470 // Flickr

    #12. Endeavor Air Inc.

    Total flights (August 2018): 248
    On-time performance: 85.5%
    Air carrier delay: 4.5%
    Weather delay: 0.2%
    National Aviation System delay: 5.6%
    Security delay: 0%
    Aircraft arriving late delay: 4.2%

  • #11. ExpressJet Airlines Inc.
    3/ Eric Salard // Wikimedia Commons

    #11. ExpressJet Airlines Inc.

    Total flights (August 2018): 3,101
    On-time performance: 85%
    Air carrier delay: 2%
    Weather delay: 0.5%
    National Aviation System delay: 7.4%
    Security delay: 0%
    Aircraft arriving late delay: 5.1%

  • #10. Mesa Airlines Inc.
    4/ redlegsfan21 // Flickr

    #10. Mesa Airlines Inc.

    Total flights (August 2018): 2,967
    On-time performance: 82%
    Air carrier delay: 4.3%
    Weather delay: 2.2%
    National Aviation System delay: 4.9%
    Security delay: 0.1%
    Aircraft arriving late delay: 6.5%

  • #9. Republic Airline
    5/ Hawkeye UK // Flickr

    #9. Republic Airline

    Total flights (August 2018): 1,180
    On-time performance: 81.9%
    Air carrier delay: 3.9%
    Weather delay: 1.3%
    National Aviation System delay: 7%
    Security delay: 0.1%
    Aircraft arriving late delay: 5.7%

  • #8. Delta Air Lines Inc.
    6/ airlines470 // Flickr

    #8. Delta Air Lines Inc.

    Total flights (August 2018): 329
    On-time performance: 81.8%
    Air carrier delay: 6.3%
    Weather delay: 1.8%
    National Aviation System delay: 6.2%
    Security delay: 0%
    Aircraft arriving late delay: 3.8%

  • #7. SkyWest Airlines Inc.
    7/ Cliff // Flickr

    #7. SkyWest Airlines Inc.

    Total flights (August 2018): 491
    On-time performance: 80.6%
    Air carrier delay: 5.4%
    Weather delay: 1.1%
    National Aviation System delay: 6.3%
    Security delay: 0%
    Aircraft arriving late delay: 6.5%

  • #6. Spirit Air Lines
    8/ Prayitno / Thank you for (12 millions +) view // Flickr

    #6. Spirit Air Lines

    Total flights (August 2018): 620
    On-time performance: 80%
    Air carrier delay: 4.7%
    Weather delay: 1.2%
    National Aviation System delay: 9.7%
    Security delay: 0.1%
    Aircraft arriving late delay: 4.2%

  • #5. Alaska Airlines Inc.
    9/ Cubbie_n_Vegas // Wikimedia Commons

    #5. Alaska Airlines Inc.

    Total flights (August 2018): 56
    On-time performance: 78.6%
    Air carrier delay: 6.1%
    Weather delay: 0%
    National Aviation System delay: 7.8%
    Security delay: 0%
    Aircraft arriving late delay: 7.6%

  • #4. United Air Lines Inc.
    10/ TDelCoro // Flickr

    #4. United Air Lines Inc.

    Total flights (August 2018): 5,391
    On-time performance: 77.8%
    Air carrier delay: 5.3%
    Weather delay: 1.2%
    National Aviation System delay: 8%
    Security delay: 0%
    Aircraft arriving late delay: 7.7%

  • #3. Envoy Air
    11/ Sla2931 // Wikimedia Commons

    #3. Envoy Air

    Total flights (August 2018): 56
    On-time performance: 73.2%
    Air carrier delay: 4.5%
    Weather delay: 0.7%
    National Aviation System delay: 17.1%
    Security delay: 0%
    Aircraft arriving late delay: 4.5%

  • #2. American Airlines Inc.
    12/ Eric Salard // Wikimedia Commons

    #2. American Airlines Inc.

    Total flights (August 2018): 784
    On-time performance: 72.6%
    Air carrier delay: 9.8%
    Weather delay: 1.1%
    National Aviation System delay: 9.7%
    Security delay: 0%
    Aircraft arriving late delay: 6.8%

  • #1. Frontier Airlines Inc.
    13/ Eddie Maloney // Wikimedia Commons

    #1. Frontier Airlines Inc.

    Total flights (August 2018): 51
    On-time performance: 58.8%
    Air carrier delay: 11.7%
    Weather delay: 1.4%
    National Aviation System delay: 9.3%
    Security delay: 0%
    Aircraft arriving late delay: 18.8%

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