Which airlines have the worst delays and cancellations?

Frontier Airlines has had the worst on-time arrival performance so far in 2023. Just 65.41% of Frontier flights arrived on time from January through April 2023. The next-worst airlines were Hawaiian Airlines (66.39%) and Spirit Airlines (66.97%).



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Airlines With the Most Cancellations Spirit Airlines had the most cancellations last week—2.07% of its flights. Frontier Airlines was right behind Spirit, with 1.87% of flights canceled.

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BTS data from July 2021 to June 2022 shows Hawaiian performed best of all U.S. airlines with just a 0.81% cancellation rate. Delta took second place again — with a cancellation rate of 1.63%. Meanwhile, merger partners JetBlue (3.81%) and Spirit Airlines (4.11%) canceled the highest percentage of all flights.

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What are the worst airports in the United States? The overall worst airport in the US for delays is JFK, based on our study of over 40,000 flights from the summer of 2022. JFK is followed by Chicago Midway, Newark, Orlando International, LaGuardia, and Denver.

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Revealed: the airlines that had the fewest delays in 2022
  • Azul Brazilian Airlines, 88.93 percent.
  • All Nippon Airlines, 88.61 percent.
  • Japan Airlines, 88 percent.
  • LATAM Airlines, 86.31 percent.
  • Delta Air Lines, 83.63 percent.
  • Avianca SA, 48 percent.
  • Emirates, 81.30 percent.
  • United Airlines, 80.46 percent.


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Based on flight status data, flights after 3 p.m. have a 50 percent higher chance of being canceled, on average, than those that depart earlier in the day. Early morning on-time performance is all thanks to the thin air traffic.

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On the reverse, Southwest Airlines had the highest rate of cancellation with a staggering 14.6%, after a massive system meltdown in December. This was followed by Alaska Airlines with 7.6% and Allegiant Air at 5.3%.

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Tuesday was the clear winner with the least cancellations and the least flight delays, with Monday close behind. According to the study, the best days of the week to fly are Tuesday and Monday, and the worst days of the week to fly are Thursday and Friday.

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Republic Airways, a regional carrier that operates some services as American Eagle, Delta Connection, and United Express, canceled the most flights in the first half of the year at 10,270, or 6% of its schedule, according to the DoT data. In June alone, it canceled 8.8% of its operations.

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The general rule is that for domestic flights, travelers should start searching for flight tickets one to three months in advance. For international flights, the best prices are typically available from two to eight months in advance. Prices can also vary widely among airlines.

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In the competition of Delta versus United, there isn't a clear winner. Delta charges less baggage fees and makes basic economy more tolerable for a frugal traveler. United, on other hand, has a stronger loyalty program, cheaper award prices and a stronger presence when it comes to global connections.

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In 2022 year, Frontier Airlines reported 20.26 customer complaints for each 100,000 enplanements on domestic-scheduled operations. This was the highest rate of customer complaints among U.S. carriers.

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Just like us after a night of good sleep, airline circulation is freshest in the morning. If your flight departs in the morning, you are less likely to be affected by delays that stack up during the day and push back or cancel departure times.

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The first flight of the day is typically best for many reasons, including being less likely to be delayed. Typically, your plane will be waiting for you at the airport since most domestic jets don't fly at night. Plus, if there are technical issues, engineers can resolve them overnight without disrupting your plans.

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Best Time To Book Domestic Flights The Expedia study found that the sweet spot is 28 to 35 days before departure while the Google study found prices bottomed out 44 days before departure. However, both studies agree that you don't want to wait until the last minute. Book at least 21 days before departure.

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Is there a cheapest month to fly? If you're looking for a bargain month to travel, February is your best bet. Flights in January closely follow February for being most affordable. At the other end of the spectrum, December and July are the first and second most expensive months to travel, on average.

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Frontier Airlines has had the worst on-time arrival performance so far in 2023. Just 65.41% of Frontier flights arrived on time from January through April 2023.

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Earlier in the day is the safest time of day to fly. More accidents occur later in the day when the pilots are tired, especially when the weather is bad and there have been delays. How does weather influence air safety? Weather is a factor in a majority of accidents.

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