Of 5,970 sampled W4 departures, 62.4% left 15 minutes or more behind schedule. Average lateness was 27.8 minutes. Sample window: Oct 19, 2025 to Oct 17, 2026.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Month | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Nov 2025 | 342 | 46.5% | 19.5 min |
| Dec 2025 | 382 | 54.7% | 26.3 min |
| Jan 2026 | 332 | 59.0% | 33.2 min |
| Feb 2026 | 311 | 47.3% | 21.7 min |
| Mar 2026 | 436 | 43.6% | 20.0 min |
| Apr 2026 | 509 | 58.7% | 21.7 min |
| May 2026 | 769 | 66.7% | 26.1 min |
| Jun 2026 | 452 | 68.4% | 26.9 min |
| Jul 2026 | 647 | 75.9% | 34.2 min |
| Aug 2026 | 667 | 71.8% | 34.8 min |
| Sep 2026 | 627 | 63.6% | 27.3 min |
| Oct 2026 | 351 | 65.0% | 34.4 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Luton Airport (LTN) | 2,030 | 66.4% | 28.2 min |
| Charleroi Brussels South (CRL) | 847 | 40.6% | 17.6 min |
| Eindhoven (EIN) | 528 | 52.3% | 23.1 min |
| Hamburg Airport (HAM) | 249 | 73.1% | 36.4 min |
| Birmingham International Airport (BHX) | 238 | 65.1% | 29.9 min |
| Billund (BLL) | 222 | 35.1% | 16.6 min |
| Orly (ORY) | 220 | 65.0% | 27.1 min |
| Lyon (LYS) | 199 | 73.9% | 30.1 min |
| Kastrup (CPH) | 168 | 76.2% | 43.6 min |
| Cologne/bonn (CGN) | 134 | 73.9% | 40.6 min |
GET /flight_delays filtered by airline_iata=W4 returns the flights delayed at this moment: flight number, scheduled and actual times and minutes of delay.
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.
