Of 1,331 sampled departures, 23.8% left 15 minutes or more behind schedule. Average lateness was 14.4 minutes. Sample window: Jan 16, 2026 to Mar 27, 2026.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Airline | Flights sampled | Late | Average lateness |
|---|---|---|---|
| ChallengAir (1I) | 31 | 77.4% | 28.7 min |
| Allegiant Air LLC (G4) | 27 | 70.4% | 35.3 min |
| American Airlines (AA) | 167 | 62.9% | 40.8 min |
| United Airlines (UA) | 52 | 57.7% | 34.3 min |
| Delta Air Lines (DL) | 161 | 50.3% | 39.9 min |
23.8% of this CHA sample left 15 minutes late or more.
GET /flight_delays returns the ones that are late at this moment: airline, flight number, scheduled time, actual time and minutes of delay.
Field names match the live API. This flight only shows the shape. It is not a live result.
That URL still says YOUR_ACCESS_KEY.
A 7-day trial replaces it with a real key and returns the CHA departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.