Of 1,774 sampled departures, 41.8% left 15 minutes or more behind schedule. Average lateness was 25.7 minutes. Sample window: Jan 16, 2026 to May 7, 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) | 99 | 80.8% | 39.3 min |
| Japan Airlines (JL) | 31 | 71.0% | 29.8 min |
| Frontier Airlines, Inc. (F9) | 28 | 53.6% | 33.3 min |
| Southwest Airlines Co. (WN) | 398 | 53.5% | 28.7 min |
| Delta Air Lines (DL) | 228 | 51.3% | 43.2 min |
41.8% of this OMA 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 OMA departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.