Flight profile · Delta Air Lines
DL1583
Houston (IAH) to Salt Lake City (SLC) · scheduled 7:45 AM – 10:12 AM
How DL1583 performs
1,034 operations, 2023-07-01 to 2026-06-30.
DL1583 arrived on time 85.5% of the time, against 81.7% for all IAH → SLC flights — this specific departure is 3.9 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 2.4 points better.
Source: US DOT Bureau of Transportation Statistics · 1,034 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1583 | 85.5% | 0.77% | -10 min | 6.0% | 1,034 |
| Delta Air Lines on IAH → SLC | 83.1% | 0.49% | -10 min | 7.0% | 3,073 |
| All IAH → SLC flights | 81.7% | 0.78% | -8 min | 7.3% | 5,909 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does DL1583 run worse on particular days?
Wednesday is historically the most reliable day and Saturday the least, a gap of 8.2 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes DL1583 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→CLT Minneapolis to Charlotte | 2024-01-08 – 2024-03-09 | 62 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1583 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 1,034 records of DL1583 operating IAH → 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.