Data sources and licences
On-Time Report uses works of the United States government, which are in the public domain under 17 USC 105. No licence notice is required; the agencies are credited on every page.
| Dataset | Agency | Used for | Refreshed |
|---|---|---|---|
| Reporting Carrier On-Time Performance (1987 to present) | Bureau of Transportation Statistics | Every flight statistic: on-time shares, delays, cancellations, causes, hours | Monthly, about two months in arrears. On file: August 2023 to July 2026 |
| Aviation support tables: airport and unique carrier lookups | Bureau of Transportation Statistics | Airport names by code, carrier names by code | As BTS updates them |
| TSA checkpoint travel numbers | Transportation Security Administration | National checkpoint passenger volumes by day | Daily on weekdays. On file through 29 Sep 2026 |
Licence
- Bureau of Transportation Statistics, Reporting Carrier On-Time Performance: US government work, public domain.
- Transportation Security Administration, checkpoint passenger volumes: US government work, public domain.
The BTS caveat
A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
Not included
The BTS T-100 segment series (passengers, seats and load factor by carrier and route) and airport-level TSA throughput are not part of this edition. BTS offers T-100 only through an interactive download form without a stable file address, and TSA releases airport-level counts as occasional documents rather than a maintained dataset. FAA airport records are not used; airport names come from the BTS lookup table.
Reuse
Figures on this site may be quoted with a link to the page they came from. The underlying files are public; the methodology describes how to reproduce any figure.