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Most delayed airlines at Pittsburgh International Airport (PIT)

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Jaromir Chalabala // Shutterstock

Most delayed airlines at Pittsburgh International Airport (PIT)

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. Also included is the total number of the airlines’ flights out of the airport and their overall on-time percentage.

Flying out of Pittsburgh International Airport 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 Pittsburgh International

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Prayitno / Thank you for (12 millions +) view // Flickr

#15. Spirit Air Lines

Total flights (August 2018): 186
On-time performance: 72.6%
Air carrier delay: 8.9%
Weather delay: 1.4%
National Aviation System delay: 9%
Security delay: 0%
Aircraft arriving late delay: 8.2%

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formulanone // Flickr

#14. PSA Airlines Inc.

Total flights (August 2018): 106
On-time performance: 84%
Air carrier delay: 8.7%
Weather delay: 0%
National Aviation System delay: 3.9%
Security delay: 0%
Aircraft arriving late delay: 3.5%

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Cliff // Flickr

#13. SkyWest Airlines Inc.

Total flights (August 2018): 157
On-time performance: 79.6%
Air carrier delay: 3.5%
Weather delay: 0.6%
National Aviation System delay: 6.1%
Security delay: 0%
Aircraft arriving late delay: 10.2%

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TDelCoro // Flickr

#12. United Air Lines Inc.

Total flights (August 2018): 306
On-time performance: 72.9%
Air carrier delay: 7.4%
Weather delay: 2%
National Aviation System delay: 6%
Security delay: 0%
Aircraft arriving late delay: 11.7%

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Ken Lund // Flickr

#11. Southwest Airlines Co.

Total flights (August 2018): 787
On-time performance: 78.3%
Air carrier delay: 8.4%
Weather delay: 1.1%
National Aviation System delay: 3.6%
Security delay: 0.1%
Aircraft arriving late delay: 8.5%

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airlines470 // Flickr

#10. Endeavor Air Inc.

Total flights (August 2018): 360
On-time performance: 78.9%
Air carrier delay: 4.8%
Weather delay: 0.5%
National Aviation System delay: 5.1%
Security delay: 0%
Aircraft arriving late delay: 10.8%

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Eric Salard // Wikimedia Commons

#9. American Airlines Inc.

Total flights (August 2018): 519
On-time performance: 71.9%
Air carrier delay: 11.4%
Weather delay: 1.3%
National Aviation System delay: 5.7%
Security delay: 0%
Aircraft arriving late delay: 9.7%

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Cory W. Watts // Wikimedia Commons

#8. JetBlue Airways

Total flights (August 2018): 213
On-time performance: 77.5%
Air carrier delay: 11.3%
Weather delay: 0%
National Aviation System delay: 3.2%
Security delay: 0.1%
Aircraft arriving late delay: 7.8%

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airlines470 // Flickr

#7. Delta Air Lines Inc.

Total flights (August 2018): 385
On-time performance: 87.8%
Air carrier delay: 5.3%
Weather delay: 0.8%
National Aviation System delay: 3.1%
Security delay: 0%
Aircraft arriving late delay: 3%

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Eric Salard // Wikimedia Commons

#6. ExpressJet Airlines Inc.

Total flights (August 2018): 1
On-time performance: 100%
Air carrier delay: 0%
Weather delay: 0%
National Aviation System delay: 0%
Security delay: 0%
Aircraft arriving late delay: 0%

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Eddie Maloney // Wikimedia Commons

#5. Frontier Airlines Inc.

Total flights (August 2018): 25
On-time performance: 80%
Air carrier delay: 7.5%
Weather delay: 0%
National Aviation System delay: 0.6%
Security delay: 0%
Aircraft arriving late delay: 11.9%

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Aero Icarus // Wikimedia Commons

#4. Allegiant Air

Total flights (August 2018): 114
On-time performance: 78.1%
Air carrier delay: 6.5%
Weather delay: 4.9%
National Aviation System delay: 2.3%
Security delay: 0%
Aircraft arriving late delay: 8.3%

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Sla2931 // Wikimedia Commons

#3. Envoy Air

Total flights (August 2018): 429
On-time performance: 78.8%
Air carrier delay: 5.3%
Weather delay: 0.9%
National Aviation System delay: 8%
Security delay: 0%
Aircraft arriving late delay: 7%

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redlegsfan21 // Flickr

#2. Mesa Airlines Inc.

Total flights (August 2018): 121
On-time performance: 78.5%
Air carrier delay: 7.4%
Weather delay: 2.5%
National Aviation System delay: 5%
Security delay: 0%
Aircraft arriving late delay: 6.6%

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Hawkeye UK // flickr

#1. Republic Airline

Total flights (August 2018): 606
On-time performance: 78.5%
Air carrier delay: 5.5%
Weather delay: 1.5%
National Aviation System delay: 4.3%
Security delay: 0%
Aircraft arriving late delay: 10.1%

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