What this is
OnTimeBoard answers one question before you book or while you wait: how often does this flight, route or airport actually run on time? Every number comes from the U.S. Department of Transportation's Bureau of Transportation Statistics (BTS), which records every scheduled domestic flight by the larger U.S. airlines and their regional partners: 22,957,747 flights from September 2023 to August 2026.
What we don't do
We don't show live flight status, sell tickets or take money from airlines to rank them. Rankings are computed the same way for everyone, and the method page explains each definition and minimum sample size. Where a number is based on too few flights to trust, we say so instead of showing it.
How it stays current
BTS publishes each month's records about two months later. We rebuild the site when they do, and keep each month's report online for good. Pages for routes or flight numbers that stop flying stay up with a note, so links don't break.
Corrections
If something looks wrong, tell us at [email protected] with the page link. We check against the source records and fix errors in the next build.