Flight profile · United Airlines
UA1779
San Diego (SAN) to Chicago (ORD) · scheduled 2:11 PM – 8:25 PM
How UA1779 performs
315 operations, 2025-08-19 to 2026-06-30.
UA1779 arrived on time 68.7% of the time, against 82.1% for all SAN → ORD flights — this specific departure is 13.4 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 15.9 points worse.
Source: US DOT Bureau of Transportation Statistics · 315 operations between 2025-08-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1779 | 68.7% | 0.00% | 3 min | 9.3% | 315 |
| United Airlines on SAN → ORD | 84.6% | 0.89% | -9 min | 5.0% | 5,046 |
| All SAN → ORD flights | 82.1% | 1.14% | -9 min | 6.3% | 9,463 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-08-19 to 2026-06-30
Other routes UA1779 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ORD→BOS Chicago to Boston | 2025-05-22 – 2026-06-30 | 194 | 66.7% |
| LAS→ORD Las Vegas to Chicago | 2024-05-23 – 2025-08-18 | 436 | 71.8% |
| ORD→PHL Chicago to Philadelphia | 2025-03-06 – 2025-03-28 | 14 | — |
| PDX→IAD Portland to Washington | 2024-06-27 – 2024-06-30 | 4 | — |
| EWR→BOS Newark to Boston | 2023-09-05 – 2024-05-22 | 112 | 60.7% |
| RSW→EWR Fort Myers to Newark | 2024-03-31 – 2024-05-01 | 32 | — |
| MCO→EWR Orlando to Newark | 2024-02-15 – 2024-03-06 | 21 | — |
| ORD→BTV Chicago to Burlington | 2024-01-09 – 2024-02-14 | 37 | — |
| SAT→EWR San Antonio to Newark | 2023-11-28 – 2023-12-20 | 23 | — |
| IAH→EWR Houston to Newark | 2023-10-29 – 2023-11-27 | 29 | — |
| MCI→EWR Kansas City to Newark | 2023-07-02 – 2023-10-27 | 81 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1779 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
53 min late
against a median of 3 min late
Percentiles over 315 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Why UA1779 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fuelling — within the carrier’s control
Share of the delay minutes US DOT attributed to each cause for UA1779 on SAN → ORD. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on SAN → ORD
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| AA518 | American Airlines | 89.1% | 13 min early | 818 |
| UA2486 | United Airlines | 83.7% | 15 min early | 742 |
| AA2131 | American Airlines | 70.8% | 2 min early | 601 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 315 records of UA1779 operating SAN → ORD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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