Of 8,809 sampled departures, 72.3% left 15 minutes or more behind schedule. Average lateness was 47.1 minutes. Sample window: Dec 23, 2025 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 |
|---|---|---|---|
| American Airlines (AA) | 4,949 | 75.6% | 50.0 min |
| Southwest Airlines Co. (WN) | 1,002 | 75.1% | 44.9 min |
| ChallengAir (1I) | 32 | 75.0% | 44.1 min |
| Air Canada (AC) | 119 | 74.0% | 47.0 min |
| Envoy Air Inc. (MQ) | 345 | 71.6% | 32.1 min |
72.3% of this DCA 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=DCAField 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": "DCA",
"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 DCA departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.