Of 129,133 sampled UA departures, 69.8% left 15 minutes or more behind schedule. Average lateness was 38.8 minutes. Sample window: Oct 16, 2025 to Oct 16, 2026. Its published schedule has about 321 flights a week on 32 routes.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Month | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Nov 2025 | 6,474 | 69.6% | 35.6 min |
| Dec 2025 | 7,605 | 78.9% | 43.0 min |
| Jan 2026 | 16,338 | 65.0% | 34.1 min |
| Feb 2026 | 588 | 56.1% | 28.5 min |
| Mar 2026 | 47,728 | 67.8% | 41.5 min |
| Apr 2026 | 609 | 63.9% | 29.8 min |
| May 2026 | 14,605 | 67.9% | 35.7 min |
| Jun 2026 | 3,820 | 71.3% | 33.8 min |
| Jul 2026 | 9,571 | 76.5% | 43.8 min |
| Aug 2026 | 8,570 | 74.4% | 39.6 min |
| Sep 2026 | 8,380 | 71.5% | 36.0 min |
| Oct 2026 | 4,173 | 74.0% | 35.5 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Washington Dulles International (IAD) | 36,388 | 74.2% | 38.1 min |
| Chicago O'hare International (ORD) | 12,802 | 89.7% | 58.7 min |
| Los Angeles International (LAX) | 12,579 | 64.3% | 31.3 min |
| Denver International (DEN) | 9,988 | 69.7% | 38.0 min |
| George Bush Intercontinental (IAH) | 9,781 | 67.6% | 36.3 min |
| Newark Liberty International (EWR) | 8,522 | 70.3% | 36.9 min |
| San Francisco International (SFO) | 7,257 | 71.7% | 33.6 min |
| New York (LGA) | 2,956 | 67.1% | 34.3 min |
| Heathrow (LHR) | 1,072 | 85.6% | 41.8 min |
| Frankfurt International Airport (FRA) | 1,009 | 85.0% | 40.1 min |
100 active registered aircraft.
| Aircraft type | Aircraft |
|---|---|
| Airbus A318/A319/A32 | 96 |
| Boeing 767 | 2 |
| Boeing 757 | 1 |
| Boeing 777 | 1 |
GET /flight_delays filtered by airline_iata=UA 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=UA
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.