Of 1,764 sampled departures, 63.6% left 15 minutes or more behind schedule. Average lateness was 20.4 minutes. Sample window: Dec 19, 2025 to Oct 7, 2026.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Airline | Flights sampled | Late | Average lateness |
|---|---|---|---|
| Air Canada (AC) | 863 | 78.1% | 31.7 min |
| United Airlines (UA) | 68 | 72.1% | 23.3 min |
| Flair Airlines Ltd. (F8) | 47 | 66.0% | 38.2 min |
| Air Transat (TS) | 55 | 58.2% | 17.2 min |
| Delta Air Lines (DL) | 60 | 56.7% | 17.4 min |
63.6% of this YYZ 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.
Field names match the live API. This flight only shows the shape. It is not a live result.
That URL still says YOUR_ACCESS_KEY.
A 7-day trial replaces it with a real key and returns the YYZ departures that are late right now, in the JSON above.
After the trial, Starter is $24.99/mo.
