Of 815 sampled departures, 38.3% left 15 minutes or more behind schedule. Average lateness was 28.1 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) | 44 | 77.3% | 38.8 min |
| Delta Air Lines (DL) | 95 | 59.0% | 42.8 min |
| American Airlines (AA) | 119 | 57.1% | 47.5 min |
| United Airlines (UA) | 152 | 52.0% | 39.7 min |
| Mexicana (MX) | 38 | 47.4% | 49.7 min |
38.3% of this BTV 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=BTVField 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": "BTV",
"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 BTV departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.