Flight profile · United Airlines
UA1857
Sioux Falls (FSD) to Chicago (ORD) · scheduled 7:40 AM – 9:32 AM
How UA1857 performs
174 operations, 2026-01-06 to 2026-06-30.
UA1857 arrived on time 78.6% of the time, against 76.2% for all FSD → ORD flights — this specific departure is 2.4 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 9.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 174 operations between 2026-01-06 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1857 | 78.6% | 2.87% | -4 min | 3.6% | 174 |
| United Airlines on FSD → ORD | 87.6% | 1.69% | -8 min | 5.3% | 949 |
| All FSD → ORD flights | 76.2% | 2.42% | -5 min | 10.4% | 4,338 |
Source: FlyerIntel analysis of US DOT BTS data · 2026-01-06 to 2026-06-30
Other routes UA1857 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 |
|---|---|---|---|
| IAD→IAH Washington to Houston | 2026-05-21 – 2026-05-21 | 1 | — |
| ORD→RSW Chicago to Fort Myers | 2026-03-29 – 2026-05-20 | 53 | — |
| ORD→MIA Chicago to Miami | 2023-12-21 – 2026-02-11 | 746 | 79.0% |
| TVC→ORD Traverse City to Chicago | 2025-12-18 – 2026-01-05 | 17 | — |
| CVG→ORD Cincinnati / Covington to Chicago | 2025-10-01 – 2025-10-24 | 15 | — |
| BOS→ORD Boston to Chicago | 2025-05-22 – 2025-07-31 | 48 | — |
| MIA→SFO Miami to San Francisco | 2025-05-22 – 2025-06-25 | 35 | — |
| PHL→ORD Philadelphia to Chicago | 2025-03-06 – 2025-04-30 | 56 | — |
| LGA→ORD New York to Chicago | 2024-09-26 – 2025-01-06 | 59 | — |
| MDT→ORD Harrisburg to Chicago | 2024-06-28 – 2024-08-18 | 49 | — |
| MSP→ORD Minneapolis to Chicago | 2024-05-23 – 2024-06-26 | 35 | — |
| BWI→ORD Baltimore to Chicago | 2023-07-01 – 2024-05-22 | 244 | 89.5% |
| ORD→SFO Chicago to San Francisco | 2023-11-30 – 2023-12-18 | 12 | — |
| ORD→SAT Chicago to San Antonio | 2023-09-29 – 2023-10-28 | 30 | — |
| ORD→SRQ Chicago to Sarasota/Bradenton | 2023-07-01 – 2023-09-28 | 90 | 71.6% |
Because the same number has served different journeys, the statistics above describe only the route UA1857 currently operates. Blending them would produce an average of two different flights.
Why UA1857 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA1857 on FSD → ORD. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Data and methodology
Calculated by FlyerIntel from 174 records of UA1857 operating FSD → 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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