Flight profile · United Airlines
UA321
Chicago (ORD) to Phoenix (PHX) · scheduled 9:25 AM – 11:20 AM
How UA321 performs
280 operations, 2023-12-01 to 2026-05-20.
UA321 arrived on time 82.4% of the time, against 78.1% for all ORD → PHX flights — this specific departure is 4.4 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 280 operations between 2023-12-01 to 2026-05-20
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA321 | 82.4% | 0.36% | -8 min | 6.5% | 280 |
| United Airlines on ORD → PHX | 82.7% | 0.67% | -9 min | 5.8% | 5,850 |
| All ORD → PHX flights | 78.1% | 1.02% | -6 min | 7.9% | 17,440 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-12-01 to 2026-05-20
Other routes UA321 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 |
|---|---|---|---|
| PHL→ORD Philadelphia to Chicago | 2025-12-19 – 2026-03-28 | 36 | — |
| IAH→ORD Houston to Chicago | 2023-11-30 – 2025-05-01 | 366 | 71.5% |
| PDX→IAH Portland to Houston | 2025-03-30 – 2025-04-30 | 32 | — |
| PDX→ORD Portland to Chicago | 2024-04-01 – 2024-05-01 | 27 | — |
| DEN→LAS Denver to Las Vegas | 2024-03-31 – 2024-04-28 | 5 | — |
| BZN→SFO Bozeman to San Francisco | 2024-02-15 – 2024-03-30 | 45 | — |
| CLE→EWR Cleveland to Newark | 2023-07-01 – 2023-11-27 | 149 | 92.4% |
| BUF→EWR Buffalo to Newark | 2023-11-24 – 2023-11-24 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA321 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 280 records of UA321 operating ORD → PHX, 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.