Flight profile · Delta Air Lines
DL1738
Salt Lake City (SLC) to Phoenix (PHX) · scheduled 3:28 PM – 4:20 PM
How DL1738 performs
419 operations, 2025-03-19 to 2026-06-30.
Source: US DOT Bureau of Transportation Statistics · 419 operations between 2025-03-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| DL1738 | 84.2% | 0.00% | -5 min | 5.5% | 419 |
| Delta Air Lines on SLC → PHX | 85.2% | 0.33% | -7 min | 4.5% | 5,184 |
| All SLC → PHX flights | 83.8% | 0.43% | -8 min | 5.0% | 17,331 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-03-19 to 2026-06-30
Other routes DL1738 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 |
|---|---|---|---|
| PHX→SLC Phoenix to Salt Lake City | 2025-03-19 – 2026-06-30 | 358 | 86.3% |
| LGA→BOS New York to Boston | 2024-06-07 – 2024-12-20 | 167 | 68.9% |
| ATL→FLL Atlanta to Fort Lauderdale | 2024-05-07 – 2024-06-06 | 31 | — |
| FLL→ATL Fort Lauderdale to Atlanta | 2024-05-07 – 2024-06-06 | 31 | — |
| MIA→LGA Miami to New York | 2024-04-09 – 2024-05-06 | 28 | — |
| SLC→PDX Salt Lake City to Portland | 2024-03-10 – 2024-04-08 | 30 | — |
| EWR→MSP Newark to Minneapolis | 2024-01-13 – 2024-03-09 | 9 | — |
| MSP→EWR Minneapolis to Newark | 2024-01-13 – 2024-03-09 | 9 | — |
| GRR→MSP Grand Rapids to Minneapolis | 2024-02-02 – 2024-03-08 | 25 | — |
| MSP→GRR Minneapolis to Grand Rapids | 2024-02-02 – 2024-03-08 | 25 | — |
| DFW→DTW Dallas–Fort Worth to Detroit | 2024-02-12 – 2024-02-18 | 2 | — |
| JFK→AUS New York to Austin | 2023-07-01 – 2024-01-07 | 150 | 83.6% |
| RSW→MSP Fort Myers to Minneapolis | 2023-11-05 – 2023-12-15 | 38 | — |
Because the same number has served different journeys, the statistics above describe only the route DL1738 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
32 min late
against a median of 5 min early
Percentiles over 419 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Why DL1738 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for DL1738 on SLC → PHX. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on SLC → PHX
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL1447 | Delta Air Lines | 92.5% | 12 min early | 752 |
| OO6327 | SkyWest Airlines | 90.8% | 10 min early | 665 |
| DL1431 | Delta Air Lines | 87.9% | 7 min early | 754 |
| DL1496 | Delta Air Lines | 81.8% | 6 min early | 747 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 419 records of DL1738 operating SLC → PHX, 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.
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