Flight profile · United Airlines
UA431
Denver (DEN) to Grand Junction (GJT) · scheduled 7:25 PM – 8:16 PM
How UA431 performs
1,007 operations, 2023-07-01 to 2026-06-30.
UA431 arrived on time 73.1% of the time, against 78.6% for all DEN → GJT flights — this specific departure is 5.4 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 4.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,007 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA431 | 73.1% | 0.60% | -3 min | 11.1% | 1,007 |
| United Airlines on DEN → GJT | 77.3% | 0.45% | -5 min | 9.0% | 2,005 |
| All DEN → GJT flights | 78.6% | 0.97% | -6 min | 8.2% | 5,591 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA431 run worse on particular days?
Wednesday is historically the most reliable day and Friday the least, a gap of 8.9 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 UA431 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 |
|---|---|---|---|
| BZN→DEN Bozeman to Denver | 2026-05-21 – 2026-06-24 | 35 | — |
| IAD→DEN Washington to Denver | 2026-03-05 – 2026-04-29 | 56 | — |
| SJC→DEN San Jose to Denver | 2025-08-19 – 2025-12-01 | 103 | 94.2% |
| MSP→EWR Minneapolis to Newark | 2025-11-27 – 2025-11-27 | 1 | — |
| BNA→EWR Nashville to Newark | 2025-08-01 – 2025-08-18 | 18 | — |
| BNA→SFO Nashville to San Francisco | 2025-06-26 – 2025-07-31 | 36 | — |
| SFO→BOS San Francisco to Boston | 2025-06-26 – 2025-07-31 | 35 | — |
| STL→DEN St. Louis to Denver | 2025-05-22 – 2025-06-25 | 35 | — |
| RSW→DEN Fort Myers to Denver | 2025-05-01 – 2025-05-21 | 21 | — |
| IAH→DEN Houston to Denver | 2025-03-06 – 2025-03-29 | 24 | — |
| SEA→DEN Seattle to Denver | 2024-09-26 – 2024-12-18 | 83 | — |
| ORD→RIC Chicago to Richmond | 2024-11-28 – 2024-11-28 | 1 | — |
| IAH→DSM Houston to Des Moines | 2023-11-23 – 2023-11-23 | 1 | — |
| LGA→DEN New York to Denver | 2023-07-02 – 2023-09-28 | 47 | — |
| MCI→DEN Kansas City to Denver | 2023-08-01 – 2023-09-04 | 35 | — |
Because the same number has served different journeys, the statistics above describe only the route UA431 currently operates. Blending them would produce an average of two different flights.
Why UA431 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA431 on DEN → GJT. 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 DEN → GJT
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA1714 | United Airlines | 84.2% | 6 min early | 822 |
| OO4704 | SkyWest Airlines | 83.5% | 8 min early | 714 |
| OO5488 | SkyWest Airlines | 82.2% | 8 min early | 898 |
| OO4770 | SkyWest Airlines | 73.3% | 5 min early | 765 |
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 1,007 records of UA431 operating DEN → GJT, 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.