These were the most delayed airports in the US this summer

AP/Shizuo Kambayashi

• Flight delays are an inevitable part of travel, but some airports this summer saw more delays than others.
• Factors ranging from severe weather in some areas, to airline operational problems, to mechanical and even alleged labor issues, led to more than one-third of all flights being delayed at some airports this summer.
• Passenger advocacy company AirHelp compiled a list of the 10 most delayed US airports this summer - take a look to see which performed the worst.
• Visit Business Insider's homepage for more stories.

Summer travel can be a lot of fun, but the logistics of crowded airports and delayed flights can add a degree of stress to any vacation.

Unfortunately for Americans traveling this summer, some of the country's biggest airports saw what felt like a constant stream of delays - in some cases, with more than one-third of all flights leaving well behind schedule.

AirHelp - a passenger advocacy company that helps people claim compensation for flight delays - sourced flight data from all around the US and ranked the most delayed major airports.

For the comparison, AirHelp included any flight that left more than 15 minutes after it was scheduled, or that was cancelled, as "delayed." The data collected were from June 1-July 31 - complete August data were not available yet - and focused on major commercial airports. A representative for the company said that data were pulled from "a variety of reliable sources such as government agencies, airport databanks, flight-tracking vendors, historical resources and commercial data brokers."

Scroll down which US airports had the most delays. If you were on a delayed flight this summer, you can check AirHelp's eligibility tool to see if you might be owed compensation from the airline.

See also: Apply here to attend IGNITION: Transportation, an event focused on the future of transportation, in San Francisco on October 22.

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