Of 61,525 sampled departures, 65.9% left 15 minutes or more behind schedule. Average lateness was 35.0 minutes. Sample window: Nov 4, 2025 to Oct 14, 2026.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Airline | Flights sampled | Late | Average lateness |
|---|---|---|---|
| Ethiopian Airlines (ET) | 112 | 92.9% | 49.3 min |
| Aeromexico (AM) | 214 | 92.5% | 28.9 min |
| British Airways (BA) | 515 | 87.0% | 39.1 min |
| Royal Air Maroc (AT) | 137 | 85.4% | 40.6 min |
| WestJet (WS) | 24 | 83.3% | 40.3 min |
65.9% of this IAD 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.
https://www.goflightlabs.com/flight_delays?access_key=YOUR_ACCESS_KEY&delay=15&type=departures&dep_iata=IADField names match the live API. This flight only shows the shape. It is not a live result.
{
"success": true,
"data": [
{
"airline_iata": "AA",
"flight_iata": "AA100",
"flight_number": "100",
"dep_iata": "IAD",
"dep_time": "2024-03-15 08:00",
"dep_actual": "2024-03-15 08:22",
"dep_delayed": 22,
"status": "active"
}
]
}
That URL still says YOUR_ACCESS_KEY.
A 7-day trial replaces it with a real key and returns the IAD departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.