Of 794 sampled K4 departures, 62.7% left 15 minutes or more behind schedule. Average lateness was 35.4 minutes. Sample window: Oct 20, 2025 to Oct 15, 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 | 80 | 42.5% | 23.3 min |
| Dec 2025 | 37 | 83.8% | 40.6 min |
| Jan 2026 | 80 | 68.8% | 40.3 min |
| Mar 2026 | 196 | 62.8% | 43.8 min |
| May 2026 | 92 | 48.9% | 25.3 min |
| Jun 2026 | 31 | 67.7% | 33.4 min |
| Jul 2026 | 75 | 70.7% | 43.1 min |
| Aug 2026 | 77 | 70.1% | 33.2 min |
| Sep 2026 | 69 | 73.9% | 28.8 min |
| Oct 2026 | 30 | 70.0% | 32.0 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| John F Kennedy International (JFK) | 186 | 78.0% | 43.3 min |
| Los Angeles International (LAX) | 184 | 58.2% | 33.4 min |
| Chicago O'hare International (ORD) | 89 | 78.7% | 63.4 min |
| Brussels Airport (BRU) | 84 | 65.5% | 18.3 min |
| Cincinnati/Northern Kentucky (CVG) | 53 | 47.2% | 26.3 min |
| Ted Stevens Anchorage International Airport (ANC) | 47 | 42.6% | 12.3 min |
| Miami International Airport (MIA) | 41 | 73.2% | 43.8 min |
| Seoul (Incheon) (ICN) | 25 | 0.0% | 0.0 min |
| Ontario International (ONT) | 25 | 40.0% | 12.6 min |
3 active registered aircraft.
| Aircraft type | Aircraft |
|---|---|
| McDonnell Douglas DC | 2 |
| Boeing 747 | 1 |
GET /flight_delays filtered by airline_iata=K4 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=K4
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.