Flight profile · Delta Air Lines
DL1128
Seattle (SEA) to Salt Lake City (SLC) · scheduled 5:30 AM – 8:30 AM
How DL1128 performs
818 operations, 2023-07-01 to 2026-06-30.
DL1128 arrived on time 92.9% of the time, against 83.7% for all SEA → SLC flights — this specific departure is 9.2 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 · 818 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1128 | 92.9% | 0.49% | -15 min | 2.2% | 818 |
| Delta Air Lines on SEA → SLC | 87.9% | 0.38% | -9 min | 3.3% | 6,613 |
| All SEA → SLC flights | 83.7% | 0.66% | -7 min | 3.9% | 11,934 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
Other routes DL1128 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 |
|---|---|---|---|
| IND→ATL Indianapolis to Atlanta | 2024-05-07 – 2024-06-06 | 30 | — |
| MSP→OMA Minneapolis to Omaha | 2024-04-22 – 2024-05-06 | 11 | — |
| OMA→MSP Omaha to Minneapolis | 2024-04-22 – 2024-05-06 | 11 | — |
| MCO→ATL Orlando to Atlanta | 2024-04-15 – 2024-04-15 | 1 | — |
| DTW→MIA Detroit to Miami | 2024-03-10 – 2024-04-08 | 22 | — |
| MIA→DTW Miami to Detroit | 2024-03-10 – 2024-04-08 | 22 | — |
| SAV→ATL Savannah to Atlanta | 2024-01-08 – 2024-03-09 | 62 | — |
| ATL→BWI Atlanta to Baltimore | 2023-12-16 – 2024-01-07 | 23 | — |
| BWI→ATL Baltimore to Atlanta | 2023-12-17 – 2024-01-07 | 22 | — |
| BWI→MSP Baltimore to Minneapolis | 2023-11-05 – 2023-12-09 | 15 | — |
| MSP→BWI Minneapolis to Baltimore | 2023-12-09 – 2023-12-09 | 1 | — |
| CHS→ATL Charleston to Atlanta | 2023-11-06 – 2023-11-27 | 12 | — |
| SLC→ORD Salt Lake City to Chicago | 2023-11-24 – 2023-11-24 | 1 | — |
| PNS→ATL Pensacola to Atlanta | 2023-10-28 – 2023-11-04 | 8 | — |
| ATL→DAB Atlanta to Daytona Beach | 2023-10-09 – 2023-10-27 | 19 | — |
| DAB→ATL Daytona Beach to Atlanta | 2023-10-09 – 2023-10-27 | 19 | — |
| MSP→SMF Minneapolis to Sacramento | 2023-09-05 – 2023-10-08 | 29 | — |
| SMF→MSP Sacramento to Minneapolis | 2023-09-05 – 2023-10-08 | 29 | — |
| ATL→JFK Atlanta to New York | 2023-09-09 – 2023-09-09 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1128 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 818 records of DL1128 operating SEA → SLC, 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.