Of 7,600 sampled departures, 56.9% left 15 minutes or more behind schedule. Average lateness was 34.5 minutes. Sample window: Dec 12, 2025 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 |
|---|---|---|---|
| British Airways (BA) | 32 | 100.0% | 35.8 min |
| Southwest Airlines Co. (WN) | 237 | 80.6% | 44.3 min |
| ChallengAir (1I) | 157 | 76.4% | 40.8 min |
| Aer Lingus (EI) | 25 | 72.0% | 33.4 min |
| Alaska Airlines (AS) | 32 | 71.9% | 35.6 min |
56.9% of this PHL 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=PHLField 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": "PHL",
"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 PHL departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.