Of 1,515 sampled LF departures, 66.7% left 15 minutes or more behind schedule. Average lateness was 53.6 minutes. Sample window: Nov 4, 2025 to Oct 14, 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 | 81 | 59.3% | 47.6 min |
| Dec 2025 | 92 | 58.7% | 55.0 min |
| Jan 2026 | 216 | 67.6% | 66.4 min |
| Mar 2026 | 639 | 68.2% | 55.6 min |
| May 2026 | 167 | 74.3% | 50.1 min |
| Jun 2026 | 23 | 78.3% | 50.2 min |
| Jul 2026 | 95 | 67.4% | 41.7 min |
| Aug 2026 | 86 | 55.8% | 45.4 min |
| Sep 2026 | 83 | 62.7% | 34.4 min |
| Oct 2026 | 33 | 63.6% | 65.8 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Washington Dulles International (IAD) | 470 | 56.8% | 39.6 min |
| Chicago O'hare International (ORD) | 318 | 77.7% | 95.5 min |
| Charlotte Douglas (CLT) | 257 | 75.1% | 48.1 min |
| Phoenix (PHX) | 113 | 59.3% | 32.6 min |
| Dallas/Fort Worth International (DFW) | 90 | 71.1% | 36.8 min |
| Denver International (DEN) | 88 | 53.4% | 39.1 min |
| Los Angeles International (LAX) | 72 | 65.3% | 42.3 min |
GET /flight_delays filtered by airline_iata=LF 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=LF
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.