Flight number record
DL 1447
Delta Air Lines · Salt Lake City to Phoenix
- Route
- SLC → PHX
- Departs
- 07:45
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1447, check with Delta Air Lines.
DL 1447 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 55 minutes. That rests on 363 flights, with a median arrival 13 minutes early.
Set against the rest of the country, DL 1447's record is 17 points better than the US average of 77.3%. That gap is worth roughly 174 fewer late arrivals for every thousand flights.
Key figures
On time
94.7%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
1.65%
National rate is 1.89%
1 hour+ late
2.0%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 1447 flies
DL 1447 flies SLC to PHX without a single fixed slot. Its most common scheduled departure was 07:45, used on 115 of 363 flights, with 08:05 (102 flights) and 07:50 (83 flights) next.
- Departs 07:45115 flights31.7%
- Departs 08:05102 flights28.1%
- Departs 07:5083 flights22.9%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:45 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1447 runs 5 points better at 94.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1447 next to SLC to PHX
Every carrier on SLC to PHX combined arrived on time 83.5% of the time across 5,778 flights, so DL 1447 is 11 points ahead of it. Delta flew 1,707 flights on the same city pair under all its flight numbers, including this one, and those ran 87.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1447thin sample | 363 | 94.7% | 54 min | 1.65% | A |
| All Delta Air Lines on SLC–PHX | 1,707 | 87.6% | 56 min | 0.53% | A+ |
| All carriers on SLC–PHX | 5,778 | 83.5% | 70 min | 0.54% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1447 quarter by quarter
DL 1447 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Oct–Dec 2025 at 88.6%, a swing of 11 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights100.0%
- Oct–Dec 202590 flights88.6%
- Jan–Mar 202690 flights95.5%
- Apr–Jun 202691 flights97.8%
- Jul–Sep 202662 flights95.2%
Scale runs 80% to 100%.
By weekday, DL 1447 ranged from 90.2% on Tuesday to 100.0% on Wednesday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1447 runs when it is late
DL 1447 often beats the schedule: 154 of 357 completed flights, 43%, arrived 15 minutes or more early. The 19 late arrivals split 6 under half an hour, 6 between 30 and 60 minutes, and 7 an hour or more.
- 15+ min early154 flights43.1%
- Within 15 min184 flights51.5%
- 15–29 min late6 flights1.7%
- 30–59 min late6 flights1.7%
- 1–2 hours late6 flights1.7%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
A late pushback is often recovered here: of 20 departures that left 15 minutes late or more, 6 still arrived on time. Only 5 left on time and still arrived late.
The worst days
Worst days for DL 1447
The latest arrival of the period was on 10 November 2025, 2 hours 51 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 November 2025 | 2 hours 51 minutes | National Airspace System |
| 29 January 2026 | 1 hour 53 minutes | Carrier |
| 29 December 2025 | 1 hour 32 minutes | Carrier |
| 18 November 2025 | 1 hour 19 minutes | National Airspace System |
| 27 October 2025 | 1 hour 17 minutes | Carrier |
Delay causes
Why DL 1447 runs late
National Airspace System accounts for 51% of the 1,032 delay minutes carriers reported here, and the remaining four split what is left.
- 51%National Airspace System
- 49%Carrier
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 506 of the 1,032 delay minutes reported here. The split is drawn from 1,032 delay minutes reported on DL 1447.
Cancellations sit at 1.65% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.0% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 507 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on one other city pair in the data, including PHX to SLC (224), but none flew often enough under DL 1447 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to PHX only.
One caution: this is a thin sample. 363 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 1447
For a booking, read DL 1447 as 94.7% on time with 1.65% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to PHX, every carrier and departure
- PHX to SLC, the return direction
- SkyWest Airlines 6327 on the same route89.3%
- Delta Air Lines 1431 on the same route84.6%
- Delta Air Lines 1496 on the same route87.1%
- Delta Air Lines 1738 on the same route84.6%
- Salt Lake City International (SLC) delay statistics
- Phoenix Sky Harbor International (PHX) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.