What month has the most flight delays?

Historically, June is the worst month for travel: It's a hugely popular time for travel, but that also brings problems. The biggest arrival delays of the year happen in June for 30 out of 50 largest airports in the U.S.



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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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Flight tracking apps and websites — FlightAware, Flightstats, and Flight Radar all track the departure and arrival of most commercial flights and are, without doubt, the best websites to check if your flight has been delayed, cancelled or diverted.

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The World's Longest Flight: New York (JFK) to Singapore Changi (SIN) New York John F Kennedy Airport – Singapore Changi is currently the longest commercial flight it is possible to book. At 15,332km, this route has been at the top of the table since 2021, and takes an average of 18 hours and 40 minutes to complete.

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The probability for a delay is at its lowest (20% or below) from 6am – 11am. Early morning flights have less runway traffic, planes ready to take off from the night before, and fewer planes already in the air. Days of the week can impact the ticket price, along with delays.

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#1 Delta Airlines - The US' Most Reliable Airline If you're looking for the most reliable airline in 2022 and 2023 overall, that title is awarded to Delta Airlines, who had the highest on-time flight percentage - 83.52% (2022) and 80.18% (2023).

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Here's the ranking of US airlines from MOST complaints in May 2022 to LEAST complaints in May 2022:
  • American Airlines (575 complaints)
  • United Airlines (400 complaints)
  • Frontier Airlines (301 complaints)
  • Delta Air Lines (281 complaints)
  • Spirit Airlines (269 complaints)
  • JetBlue Airways (244 complaints)


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Frontier was named the worst US airline in 2023 by claims management company AirAdvisor. Spirit, another low-cost airline, was ranked the second-worst on the list. Delta took the top spot as the best US airline this year.

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You might avoid these carriers, when possible, to be less likely to encounter unpleasant flight experiences. U.S. travelers report that American Airlines is the most unreliable airline in the world when measured by the total flight problems and reported complaints in 2022.

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