Of 3,204 sampled departures, 37.7% left 15 minutes or more behind schedule. Average lateness was 22.1 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) | 148 | 75.7% | 37.1 min |
| Southwest Airlines Co. (WN) | 185 | 71.9% | 33.0 min |
| American Airlines (AA) | 433 | 62.4% | 38.5 min |
| Delta Air Lines (DL) | 365 | 56.7% | 41.6 min |
| United Airlines (UA) | 239 | 56.1% | 32.8 min |
37.7% of this CHS 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 CHS departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.
