Of 1,101 sampled departures, 40.9% left 15 minutes or more behind schedule. Average lateness was 24.7 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 |
|---|---|---|---|
| American Airlines (AA) | 206 | 66.5% | 43.4 min |
| Envoy Air Inc. (MQ) | 93 | 60.2% | 23.9 min |
| Allegiant Air LLC (G4) | 37 | 51.4% | 26.1 min |
| Delta Air Lines (DL) | 161 | 47.8% | 35.8 min |
| United Airlines (UA) | 103 | 47.6% | 37.5 min |
40.9% of this GSP 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 GSP departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.
