Flight profile · United Airlines
UA1577
Chicago (ORD) to San Francisco (SFO) · scheduled 2:35 PM – 5:36 PM
How UA1577 performs
667 operations, 2024-05-23 to 2026-06-30.
UA1577 arrived on time 76.5% of the time, against 72.0% for all ORD → SFO flights — this specific departure is 4.5 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 2.1 points better.
Source: US DOT Bureau of Transportation Statistics · 667 operations between 2024-05-23 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1577 | 76.5% | 1.05% | -4 min | 10.2% | 667 |
| United Airlines on ORD → SFO | 74.4% | 0.98% | -4 min | 9.5% | 10,620 |
| All ORD → SFO flights | 72.0% | 1.10% | -3 min | 10.2% | 15,593 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-05-23 to 2026-06-30
Other routes UA1577 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 |
|---|---|---|---|
| SFO→SEA San Francisco to Seattle | 2025-09-25 – 2026-06-30 | 71 | — |
| ATL→ORD Atlanta to Chicago | 2026-05-21 – 2026-06-24 | 35 | — |
| SFO→SAN San Francisco to San Diego | 2026-01-06 – 2026-05-20 | 135 | 76.9% |
| CVG→ORD Cincinnati / Covington to Chicago | 2026-04-30 – 2026-05-20 | 18 | — |
| PWM→ORD Portland to Chicago | 2026-04-05 – 2026-04-26 | 4 | — |
| RDU→ORD Raleigh–Durham to Chicago | 2026-03-05 – 2026-03-28 | 21 | — |
| JAX→ORD Jacksonville to Chicago | 2026-02-12 – 2026-03-02 | 12 | — |
| DCA→ORD Washington to Chicago | 2025-03-06 – 2025-08-18 | 64 | — |
| SFO→PIT San Francisco to Pittsburgh | 2025-08-01 – 2025-08-18 | 18 | — |
| SFO→DTW San Francisco to Detroit | 2025-05-22 – 2025-06-25 | 30 | — |
| OMA→ORD Omaha to Chicago | 2025-01-07 – 2025-02-12 | 27 | — |
| MCO→ORD Orlando to Chicago | 2024-12-19 – 2025-01-06 | 19 | — |
| SFO→LAS San Francisco to Las Vegas | 2024-12-19 – 2025-01-06 | 19 | — |
| AUS→ORD Austin to Chicago | 2024-05-23 – 2024-12-18 | 155 | 90.3% |
| ORD→BNA Chicago to Nashville | 2024-03-31 – 2024-05-22 | 49 | — |
| ORD→SLC Chicago to Salt Lake City | 2024-02-15 – 2024-03-30 | 45 | — |
| LGA→ORD New York to Chicago | 2024-03-07 – 2024-03-29 | 20 | — |
| EWR→ROC Newark to Rochester | 2023-10-29 – 2024-02-14 | 107 | 84.6% |
| LAS→EWR Las Vegas to Newark | 2023-10-29 – 2023-10-31 | 3 | — |
| IAD→AUS Washington to Austin | 2023-10-19 – 2023-10-23 | 2 | — |
| ABQ→EWR Albuquerque to Newark | 2023-10-05 – 2023-10-16 | 10 | — |
| IAD→BNA Washington to Nashville | 2023-09-05 – 2023-09-28 | 24 | — |
| SNA→EWR Santa Ana to Newark | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1577 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 667 records of UA1577 operating ORD → SFO, 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.