Flight profile · United Airlines
UA1638
Denver (DEN) to Los Angeles (LAX) · scheduled 8:00 AM – 9:32 AM
How UA1638 performs
643 operations, 2024-09-26 to 2026-06-30.
UA1638 arrived on time 89.7% of the time, against 79.2% for all DEN → LAX flights — this specific departure is 10.6 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 7.6 points better.
Source: US DOT Bureau of Transportation Statistics · 643 operations between 2024-09-26 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1638 | 89.7% | 0.00% | -7 min | 1.7% | 643 |
| United Airlines on DEN → LAX | 82.1% | 0.73% | -7 min | 6.1% | 9,465 |
| All DEN → LAX flights | 79.2% | 0.70% | -6 min | 6.9% | 23,079 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-09-26 to 2026-06-30
Other routes UA1638 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→CMH Chicago to Columbus | 2024-08-19 – 2024-09-25 | 35 | — |
| DEN→SJC Denver to San Jose | 2024-05-23 – 2024-08-18 | 88 | — |
| GJT→DEN Grand Junction to Denver | 2024-03-31 – 2024-05-22 | 53 | — |
| DFW→IAH Dallas–Fort Worth to Houston | 2024-03-07 – 2024-03-30 | 24 | — |
| LAX→ORD Los Angeles to Chicago | 2024-02-15 – 2024-03-06 | 21 | — |
| EWR→MSP Newark to Minneapolis | 2023-07-01 – 2024-02-14 | 171 | 67.1% |
| IAH→LAS Houston to Las Vegas | 2024-02-11 – 2024-02-11 | 1 | — |
| PDX→ORD Portland to Chicago | 2023-12-21 – 2024-01-08 | 19 | — |
| ORD→EWR Chicago to Newark | 2023-12-13 – 2023-12-13 | 1 | — |
| SFO→DEN San Francisco to Denver | 2023-10-29 – 2023-11-27 | 30 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1638 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 643 records of UA1638 operating DEN → LAX, 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.