Of 982 sampled departures, 28.9% left 15 minutes or more behind schedule. Average lateness was 20.0 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) | 38 | 71.1% | 32.6 min |
| United Airlines (UA) | 27 | 63.0% | 70.4 min |
| Delta Air Lines (DL) | 74 | 58.1% | 49.4 min |
| American Airlines (AA) | 258 | 50.4% | 35.3 min |
| Envoy Air Inc. (MQ) | 24 | 50.0% | 18.8 min |
28.9% of this ILM 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 ILM departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.