Flight profile · Delta Air Lines
DL1091
Salt Lake City (SLC) to San Francisco (SFO) · scheduled 10:59 PM – 11:59 PM
How DL1091 performs
719 operations, 2024-06-07 to 2026-06-30.
DL1091 arrived on time 76.1% of the time, against 72.3% for all SLC → SFO flights — this specific departure is 3.8 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 5.0 points better.
Source: US DOT Bureau of Transportation Statistics · 719 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1091 | 76.1% | 0.42% | -3 min | 6.1% | 719 |
| Delta Air Lines on SLC → SFO | 71.1% | 0.57% | -1 min | 8.5% | 5,048 |
| All SLC → SFO flights | 72.3% | 0.69% | -3 min | 9.3% | 10,556 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1091 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 |
|---|---|---|---|
| MEM→MSP Memphis to Minneapolis | 2023-07-01 – 2024-06-06 | 227 | 91.0% |
| DTW→IND Detroit to Indianapolis | 2024-04-09 – 2024-05-06 | 24 | — |
| IND→DTW Indianapolis to Detroit | 2024-04-09 – 2024-05-06 | 24 | — |
| STL→SLC St. Louis to Salt Lake City | 2024-01-14 – 2024-03-08 | 26 | — |
| BOS→MIA Boston to Miami | 2024-01-08 – 2024-02-14 | 17 | — |
| MSP→SFO Minneapolis to San Francisco | 2023-12-16 – 2024-01-07 | 23 | — |
| SFO→MSP San Francisco to Minneapolis | 2023-12-16 – 2024-01-07 | 19 | — |
| ATL→IAD Atlanta to Washington | 2023-11-23 – 2023-11-24 | 2 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1091 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 719 records of DL1091 operating SLC → SFO, 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.