Flight profile · United Airlines
UA1220
Denver (DEN) to Detroit (DTW) · scheduled 5:20 PM – 10:15 PM
How UA1220 performs
859 operations, 2023-09-05 to 2026-06-30.
UA1220 arrived on time 71.6% of the time, against 77.9% for all DEN → DTW flights — this specific departure is 6.3 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 7.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 859 operations between 2023-09-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1220 | 71.6% | 0.35% | -1 min | 11.9% | 859 |
| United Airlines on DEN → DTW | 78.9% | 0.41% | -5 min | 8.1% | 2,186 |
| All DEN → DTW flights | 77.9% | 0.49% | -4 min | 7.0% | 9,093 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30
By day of week
Does UA1220 run worse on particular days?
Saturday is historically the most reliable day and Friday the least, a gap of 11.4 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA1220 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 |
|---|---|---|---|
| MSP→DEN Minneapolis to Denver | 2026-03-05 – 2026-03-28 | 24 | — |
| BWI→LAX Baltimore to Los Angeles | 2025-10-26 – 2025-12-01 | 37 | — |
| SAN→DEN San Diego to Denver | 2025-08-01 – 2025-08-18 | 18 | — |
| LAS→DEN Las Vegas to Denver | 2025-06-26 – 2025-07-31 | 36 | — |
| SFO→LAS San Francisco to Las Vegas | 2025-06-26 – 2025-07-31 | 36 | — |
| EWR→DEN Newark to Denver | 2024-03-31 – 2025-03-05 | 53 | — |
| IAH→AUS Houston to Austin | 2025-01-07 – 2025-02-12 | 37 | — |
| DEN→GRR Denver to Grand Rapids | 2024-05-02 – 2024-05-22 | 21 | — |
| DEN→TUL Denver to Tulsa | 2023-12-01 – 2023-12-20 | 20 | — |
| PSP→DEN Palm Springs to Denver | 2023-12-01 – 2023-12-20 | 20 | — |
| DEN→RSW Denver to Fort Myers | 2023-10-28 – 2023-10-28 | 1 | — |
| FCA→DEN Kalispell to Denver | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1220 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 859 records of UA1220 operating DEN → DTW, 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.