Flight profile · United Airlines
UA1983
Miami (MIA) to Chicago (ORD) · scheduled 12:30 PM – 2:55 PM
How UA1983 performs
922 operations, 2023-07-01 to 2026-06-30.
UA1983 arrived on time 81.7% of the time, against 74.6% for all MIA → ORD flights — this specific departure is 7.1 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 7.7 points better.
Source: US DOT Bureau of Transportation Statistics · 922 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1983 | 81.7% | 1.30% | -8 min | 7.8% | 922 |
| United Airlines on MIA → ORD | 73.9% | 1.07% | -3 min | 9.9% | 2,995 |
| All MIA → ORD flights | 74.6% | 1.28% | -6 min | 9.5% | 13,297 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA1983 run worse on particular days?
Monday is historically the most reliable day and Sunday the least, a gap of 13.6 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA1983 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→IAH Chicago to Houston | 2024-06-27 – 2026-04-29 | 85 | — |
| ORD→LGA Chicago to New York | 2023-09-29 – 2026-01-04 | 16 | — |
| ORD→BOS Chicago to Boston | 2025-09-25 – 2025-10-24 | 18 | — |
| ORD→LAX Chicago to Los Angeles | 2024-05-23 – 2025-08-18 | 103 | 62.7% |
| LAX→TPA Los Angeles to Tampa | 2025-06-26 – 2025-08-18 | 54 | — |
| ORD→SNA Chicago to Santa Ana | 2025-02-13 – 2025-04-30 | 71 | — |
| ORD→EWR Chicago to Newark | 2024-12-19 – 2025-01-06 | 19 | — |
| ORD→SFO Chicago to San Francisco | 2024-03-07 – 2024-09-25 | 62 | — |
| SFO→MIA San Francisco to Miami | 2023-12-20 – 2024-09-25 | 39 | — |
| RDU→ORD Raleigh–Durham to Chicago | 2024-08-19 – 2024-09-25 | 35 | — |
| ORD→SYR Chicago to Syracuse | 2023-12-20 – 2024-01-08 | 16 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1983 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 922 records of UA1983 operating MIA → 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.