CAA UK flight punctuality statistics
Covers Jan 2025 to Mar 2025 · Grain: airline, route, airport and month
Loaded 05 Aug 2026
Route punctuality report
Heathrow to Chicago (O'hare): which airline is on time?
CAA matched-flight punctuality for this route, covering Jan 2025 to Mar 2025.
Figures compare airlines on the same route and window. They never predict an individual flight.
Airline comparison
Ranked by on-time share among airlines with enough evidence. Airlines under 1,000 matched flights show their figures but are not ranked.
| Airline | On time | Average delay | Cancelled | Matched flights |
|---|---|---|---|---|
| United AirlinesLow evidence | 81.8% | 11 min | 3.3% | 350 |
| British Airways PlcLow evidence | 75.1% | 14 min | 2.9% | 339 |
| American AirlinesLow evidence | 72.6% | 29 min | 5.6% | 337 |
Month by month on this route
| Month | On time | Average delay | Cancelled | Matched flights |
|---|---|---|---|---|
| Jan 2025 | 73.8% | 20 min | 3.8% | 354 |
| Feb 2025 | 82.9% | 17 min | 1.3% | 311 |
| Mar 2025 | 73.9% | 16 min | 6.2% | 361 |
Sources and caveats
Period covered comes from the data itself; the load date is when that data reached this service. The two are shown separately on purpose.
- Punctuality figures cover flights the CAA matched between schedule and operation; unmatched flights are excluded.