Flight profile · Delta Air Lines
DL1623
Salt Lake City (SLC) to Denver (DEN) · scheduled 1:20 PM – 3:20 PM
How DL1623 performs
725 operations, 2024-06-07 to 2026-06-30.
DL1623 arrived on time 80.2% of the time, against 77.7% for all SLC → DEN flights — this specific departure is 2.5 percentage points better than the route as a whole. Against Delta Air Lines’s own flights on this route it is 1.5 points better.
Source: US DOT Bureau of Transportation Statistics · 725 operations between 2024-06-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1623 | 80.2% | 0.69% | -5 min | 6.0% | 725 |
| Delta Air Lines on SLC → DEN | 78.6% | 0.32% | -6 min | 7.8% | 4,981 |
| All SLC → DEN flights | 77.7% | 0.64% | -6 min | 7.1% | 23,658 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-06-07 to 2026-06-30
Other routes DL1623 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 |
|---|---|---|---|
| DEN→SLC Denver to Salt Lake City | 2025-06-08 – 2026-06-30 | 295 | 82.1% |
| LAX→MCO Los Angeles to Orlando | 2024-05-09 – 2024-06-06 | 16 | — |
| SAT→ATL San Antonio to Atlanta | 2024-04-09 – 2024-05-06 | 28 | — |
| LGA→MSP New York to Minneapolis | 2024-01-08 – 2024-04-08 | 92 | 86.8% |
| LGA→MCO New York to Orlando | 2023-07-01 – 2024-01-07 | 116 | 70.2% |
| ATL→DTW Atlanta to Detroit | 2023-11-05 – 2023-12-15 | 40 | — |
| ATL→MSP Atlanta to Minneapolis | 2023-10-01 – 2023-10-08 | 2 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1623 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 725 records of DL1623 operating SLC → DEN, 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.