Who publishes this
About DelayAtlas
This site exists because the US government publishes an extraordinarily detailed record of every domestic flight, and almost nobody reads it. 11,272,202 flights over 12 months, free to download, and the questions it answers are the ones travellers actually ask: which airline is better on this route, what time should I leave, is December worth avoiding.
Editorial mission
What this site does
One job: turn the DOT's on-time performance database into decisions a traveller can act on, without exaggerating what the data supports.
That means publishing the sample size next to every percentage, refusing to build a page around an operation with too few flights to judge, showing cancellation rates beside punctuality rates, and stating on every page which twelve months the figures cover. It also means saying plainly when a difference is too small to matter, which is a sentence most comparison sites never print.
The full set of definitions, thresholds and limitations is on the methodology page, including the limitations that make the site's own numbers look less authoritative.
Funding
How this is paid for, and what that rules out
Display advertising. That is the whole business model, and it is stated here rather than discovered.
Four things follow from it, and they are permanent editorial commitments rather than current policy:
- No affiliate links to airlines, booking sites or travel agencies. A page that recommends the earliest departure earns nothing whether you book it or not.
- No lead selling. Nothing entered into the search box is stored, transmitted or sold. The search runs entirely in your browser against a file the page already downloaded.
- No relationship with flight compensation claim companies. The US has no EU-style cash compensation scheme for delays, so in most cases there is nothing for them to claim, and this site links to none of them.
- No airline affiliation, sponsorship or advance review of content. Carriers that score badly here score badly here.
Advertising is clearly separated from content, and no advertiser sees a page before it is published.
Byline
Who writes this
Kaan Tokalı
Kaan Tokalı built and maintains DelayAtlas. Every figure here is recomputed from the raw US Department of Transportation carrier filings each month rather than copied from a published summary, so anyone with the same source files can check the arithmetic.
Corrections, disagreements and requests for a route that has no page yet all go to the same address: kaantokali1@gmail.com. A disagreement backed by a computation from the same source data is the most useful mail this site receives.
Scope
What this site is not
Not a flight tracker. The one exception is the live status page, which shows what the FAA is reporting about airports at this moment. That is airport-level operational status, not flight tracking: it will tell you an airport is under a ground delay programme, never where an aircraft is. For your own departure, use your airline's app.
Not a booking site. No fares, no availability, no inventory. The site tells you which flight has the better record; buying it is between you and the airline.
Not a claims service. It does not file anything on your behalf and takes no fee from anyone who does.
Not international. The DOT database covers US domestic flights. International segments are outside it, and inventing coverage the source does not have would be worse than the gap.
Verify it
Check the work
The source is public and in the public domain. Anyone can download the same monthly files and recompute every figure here. The data sources page names the exact database, and the methodology page states every threshold applied to it.
Current data covers June 2025 to May 2026 and was generated on July 22, 2026. The figures refresh monthly, automatically, from the raw filings rather than from a stored total.