Of 3,365 sampled departures, 37.8% left 15 minutes or more behind schedule. Average lateness was 20.4 minutes. Sample window: Dec 29, 2025 to Sep 13, 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) | 252 | 85.3% | 48.5 min |
| Southwest Airlines Co. (WN) | 1,314 | 46.4% | 23.6 min |
| American Airlines (AA) | 74 | 39.2% | 26.7 min |
| Alaska Airlines (AS) | 296 | 36.2% | 21.6 min |
| Delta Air Lines (DL) | 327 | 27.2% | 15.9 min |
37.8% of this SJC 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=SJCField 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": "SJC",
"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 SJC departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.