Flight profile · United Airlines
UA2637
Denver (DEN) to Grand Rapids (GRR) · scheduled 9:50 AM – 2:23 PM
How UA2637 performs
824 operations, 2023-11-28 to 2026-06-30.
UA2637 arrived on time 87.3% of the time, against 75.3% for all DEN → GRR flights — this specific departure is 12.1 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 10.9 points better.
Source: US DOT Bureau of Transportation Statistics · 824 operations between 2023-11-28 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA2637 | 87.3% | 0.24% | -6 min | 2.7% | 824 |
| United Airlines on DEN → GRR | 76.5% | 0.41% | -3 min | 7.0% | 2,192 |
| All DEN → GRR flights | 75.3% | 0.39% | -2 min | 6.9% | 3,850 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-11-28 to 2026-06-30
Other routes UA2637 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 |
|---|---|---|---|
| EGE→DEN Eagle to Denver | 2025-06-26 – 2025-09-24 | 73 | — |
| DEN→PHL Denver to Philadelphia | 2025-08-01 – 2025-08-18 | 18 | — |
| COS→DEN Colorado Springs to Denver | 2025-03-31 – 2025-04-30 | 31 | — |
| GRR→ORD Grand Rapids to Chicago | 2024-09-27 – 2024-10-25 | 23 | — |
| SEA→DEN Seattle to Denver | 2024-05-02 – 2024-05-22 | 21 | — |
| SEA→IAH Seattle to Houston | 2023-10-29 – 2023-11-27 | 30 | — |
| ORD→DCA Chicago to Washington | 2023-09-29 – 2023-10-27 | 25 | — |
| ORD→CVG Chicago to Cincinnati / Covington | 2023-09-05 – 2023-09-28 | 24 | — |
| ORD→SYR Chicago to Syracuse | 2023-08-01 – 2023-09-04 | 35 | — |
| DEN→CHS Denver to Charleston | 2023-07-01 – 2023-07-31 | 31 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2637 currently operates. Blending them would produce an average of two different flights.
Why UA2637 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 UA2637 on DEN → GRR. 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 824 records of UA2637 operating DEN → GRR, 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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