Of 133,122 sampled UA departures, 69.9% left 15 minutes or more behind schedule. Average lateness was 38.7 minutes. Sample window: Nov 2, 2025 to Nov 1, 2026. Its published schedule has about 38 flights a week on 5 routes.
These are historical aggregates, not live status. A departure is late at 15 minutes past schedule.
| Month | Departures sampled | Late | Average lateness |
|---|---|---|---|
| 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 | 47,741 | 67.9% | 41.5 min |
| Apr 2026 | 632 | 63.1% | 29.5 min |
| May 2026 | 14,605 | 67.9% | 35.7 min |
| Jun 2026 | 3,825 | 71.2% | 33.8 min |
| Jul 2026 | 9,571 | 76.5% | 43.8 min |
| Aug 2026 | 8,581 | 74.4% | 39.6 min |
| Sep 2026 | 8,410 | 71.5% | 36.1 min |
| Oct 2026 | 8,749 | 73.8% | 35.7 min |
| Departure airport | Departures sampled | Late | Average lateness |
|---|---|---|---|
| Washington Dulles International Airport (IAD) | 38,943 | 74.1% | 37.9 min |
| Los Angeles International Airport (LAX) | 13,607 | 64.6% | 32.0 min |
| Chicago O'Hare International Airport (ORD) | 12,802 | 89.7% | 58.7 min |
| Denver International Airport (DEN) | 9,988 | 69.7% | 38.0 min |
| George Bush Intercontinental Airport (IAH) | 9,781 | 67.6% | 36.3 min |
| Newark Liberty International Airport (EWR) | 8,657 | 70.5% | 36.6 min |
| San Francisco International Airport (SFO) | 7,009 | 71.7% | 33.5 min |
| LaGuardia Airport (LGA) | 3,035 | 66.9% | 34.1 min |
| London Heathrow Airport (LHR) | 1,280 | 87.0% | 41.1 min |
| Frankfurt Main Airport (FRA) | 1,094 | 85.2% | 40.3 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.
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