Of 182 sampled J2 departures, 86.3% left 15 minutes or more behind schedule. Average lateness was 37.0 minutes. Sample window: Oct 20, 2025 to Oct 13, 2026. Its published schedule has about 49 flights a week on 1 routes.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Month | Departures sampled | Late | Average lateness |
|---|---|---|---|
| May 2026 | 24 | 79.2% | 28.3 min |
| Sep 2026 | 22 | 81.8% | 38.8 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Gatwick (LGW) | 77 | 94.8% | 41.7 min |
| Charles De Gaulle (CDG) | 37 | 89.2% | 40.9 min |
| Heathrow (LHR) | 29 | 93.1% | 37.2 min |
GET /flight_delays filtered by airline_iata=J2 returns the flights delayed at this moment: flight number, scheduled and actual times and minutes of delay.
https://www.goflightlabs.com/flight_delays?access_key=YOUR_ACCESS_KEY&delay=15&type=departures&airline_iata=J2
That URL still says YOUR_ACCESS_KEY.
A 7-day trial replaces it with a real key. After the trial, Starter is $24.99/mo.