Terms of use

Every number here is a historical statistic computed from US Department of Transportation on-time performance filings, covering June 2025 to May 2026. It describes what happened over a past twelve-month window.

It is not a forecast, a guarantee, or a statement about any particular flight. A route recorded at 85% on time will still deliver a long delay to somebody today. Base rates move odds; they do not decide outcomes.

The methodology page states every definition, threshold and known limitation applied to these figures, including the ones that make them less flattering.

The site is provided as is. Reasonable care goes into the pipeline and the figures are recomputed from source each month, but no warranty is given that they are accurate, complete, current or fit for any particular purpose.

Errors are possible at several points: the source filings themselves, the aggregation, or the presentation. Where an error is found it is corrected in the pipeline so the fix applies everywhere at once. Reports go to kaantokali1@gmail.com.

To the fullest extent permitted by law, no liability is accepted for any loss arising from reliance on these figures, including missed flights, missed connections and consequential travel costs.

Nothing here is advice of any kind. The guides describe general patterns in published data and, in one case, describe US passenger rights in general terms. That description is informational only, may be out of date, and is not a substitute for the Department of Transportation's own aviation consumer protection guidance or for a lawyer.

Booking decisions are yours. Airline contracts of carriage, fare rules and customer service commitments are between you and the carrier, and this site is not a party to any of them.

DelayAtlas is independent. It is not affiliated with, endorsed by, or sponsored by any airline, airport, the Department of Transportation, or the Bureau of Transportation Statistics.

Airline and airport names are used descriptively to identify the operations being measured. All trademarks belong to their owners.

The underlying DOT data is a US federal government work in the public domain and free for anyone to use. The derived statistics, charts and written analysis on this site are its own work.

Quoting figures with attribution and the data period attached is welcome, in journalism, research or anywhere else. A delay statistic without a date is not a statistic, so the period matters more than the credit.

Wholesale republication of pages, and automated scraping at a rate that degrades the site for other readers, are not. Access may be blocked where that happens.

The site is funded by display advertising. Advertisements are supplied by third-party networks and are not endorsements. No advertiser reviews content before publication, and no advertiser has ever influenced a figure or a conclusion here.

How advertising technology handles your data is covered in the privacy policy.

These terms may change. The date at the top of the page changes with them, and continued use after that date means acceptance.

Governing law and jurisdiction have not yet been specified for this publication. Until they are, any dispute will be handled in good faith by correspondence in the first instance, at kaantokali1@gmail.com.