Of 3,039 sampled departures, 46.7% left 15 minutes or more behind schedule. Average lateness was 30.2 minutes. Sample window: Jan 16, 2026 to Sep 18, 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) | 172 | 75.0% | 37.7 min |
| Frontier Airlines, Inc. (F9) | 42 | 57.1% | 60.6 min |
| Southwest Airlines Co. (WN) | 753 | 56.4% | 35.1 min |
| Mexicana (MX) | 39 | 56.4% | 40.8 min |
| American Airlines (AA) | 616 | 54.2% | 34.7 min |
46.7% of this CMH 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 CMH departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.
