Airline Delay and Cancellation Cause Reporting

Current understanding

To be populated as evidence accumulates.

2026-10-15 — Cause of Airline Delay and Cancellation Categories Under Section 511(b) of the FAA Reauthorization Act of 2024; Delay of Effective Date: cross-connection with airline-delay-cancellation-cause-categories: The delayed effective date applies to the new cause categories that feed into DOT’s airline delay/cancellation cause reporting regime; carriers continue reporting under the prior categories until Feb 1, 2027. (novelty: 2)
2026-09-03 — Cause of Airline Delay and Cancellation Categories Under Section 511(b) of the FAA Reauthorization Act of 2024: Final rule implementing Section 511(b) of the FAA Reauthorization Act of 2024 requires airlines to recategorize ten specified delay and cancellation events out of the carrier-caused bucket into a new category so public statistics reflect causes Congress deemed outside airline control; reporting-only change with no effect on passenger rights or operations. (novelty: 2)