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The Department of Transportation has issued a final rule changing how airlines report the reasons for flight delays and cancellations. This change implements a specific requirement from the FAA Reauthorization Act of 2024.

Why it matters: This is primarily an administrative update to align existing reporting systems with new statutory language. It does not change how flights are operated, but it changes how the data behind delays is categorized. This helps ensure that when the public or researchers look at delay statistics, the numbers reflect the legal definition of what is the airline’s fault versus what is not.

Who it affects

  • Airlines, which must update their data reporting systems to use the new category.

The U.S. Department of Transportation published this final rule in the Federal Register; readers should check the original document for the specific list of the ten excluded events.

Agency: Transportation Department,
Source: Federal Register — read the official document

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