Flight number record
DL 1582
Delta Air Lines · Salt Lake City to Sacramento
- Route
- SLC → SMF
- Departs
- 22:59
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1582, check with Delta Air Lines.
DL 1582 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 349 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 1582's record is 12 points better than the US average of 77.3%. That gap is worth roughly 117 fewer late arrivals for every thousand flights.
Key figures
On time
89.0%
Arrivals under 15 minutes late, of 345 completed flights
Avg delay
41 min
Across delayed arrivals only, not all flights
Cancelled
1.15%
National rate is 1.89%
1 hour+ late
1.7%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 8 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.
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Schedule
When DL 1582 flies
DL 1582 flies SLC to SMF without a single fixed slot. Its most common scheduled departure was 22:59, used on 54 of 349 flights, with 22:50 (39 flights) and 21:30 (37 flights) next.
- Departs 22:5954 flights15.5%
- Departs 22:5039 flights11.2%
- Departs 21:3037 flights10.6%
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 22:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1582 runs 19 points better at 89.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1582 next to SLC to SMF
Every carrier on SLC to SMF combined arrived on time 84.8% of the time across 2,165 flights, so DL 1582 is 4 points ahead of it. Delta flew 1,503 flights on the same city pair under all its flight numbers, including this one, and those ran 86.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1582thin sample | 349 | 89.0% | 41 min | 1.15% | A |
| All Delta Air Lines on SLC–SMF | 1,503 | 86.4% | 66 min | 1.20% | A |
| All carriers on SLC–SMF | 2,165 | 84.8% | 63 min | 0.92% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1582 quarter by quarter
Quarter by quarter DL 1582 held fairly steady: 93.3% in Jul–Sep 2025, 91.1% in Oct–Dec 2025, 89.4% in Jan–Mar 2026, 87.8% in Apr–Jun 2026 and 85.2% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202580 flights91.1%
- Jan–Mar 202686 flights89.4%
- Apr–Jun 202691 flights87.8%
- Jul–Sep 202662 flights85.2%
Scale runs 75% to 100%.
By weekday, DL 1582 did best on Tuesday at 96.0% on time and worst on Saturday at 81.2%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1582 runs when it is late
DL 1582 often beats the schedule: 100 of 345 completed flights, 29%, arrived 15 minutes or more early. The 38 late arrivals split 17 under half an hour, 15 between 30 and 60 minutes, and 6 an hour or more. Not one arrived two hours late.
- 15+ min early100 flights29.0%
- Within 15 min207 flights60.0%
- 15–29 min late17 flights4.9%
- 30–59 min late15 flights4.3%
- 1–2 hours late6 flights1.7%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 345 completed flights by arrival against schedule.
A late pushback is often recovered here: of 54 departures that left 15 minutes late or more, 22 still arrived on time. Only 6 left on time and still arrived late.
The worst days
Worst days for DL 1582
The latest arrival of the period was on 24 June 2026, 1 hour 33 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 June 2026 | 1 hour 33 minutes | Carrier |
| 13 June 2026 | 1 hour 29 minutes | Carrier |
| 23 August 2026 | 1 hour 23 minutes | Carrier |
| 21 March 2026 | 1 hour 15 minutes | Carrier |
| 26 October 2025 | 1 hour 11 minutes | Carrier |
Delay causes
Why DL 1582 runs late
Carrier accounts for 55% of the 1,552 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Carrier
- 31%Late-arriving aircraft
- 11%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 853 of the 1,552 delay minutes reported here. The split is drawn from 1,552 delay minutes reported on DL 1582.
Cancellations sit at 1.15% 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 1.7% 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 532 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 two other city pairs in the data, including ATL to FLL (16) and FLL to ATL (16), but none flew often enough under DL 1582 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to SMF only.
One caution: this is a thin sample. 349 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 1582
For a booking, DL 1582 has one of the better records a US domestic flight can show: 89.0% on time and 1.15% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to SMF, every carrier and departure
- SMF to SLC, the return direction
- Delta Air Lines 1423 on the same route85.2%
- Delta Air Lines 1342 on the same route81.8%
- Delta Air Lines 1367 on the same route92.6%
- Salt Lake City International (SLC) delay statistics
- Sacramento International (SMF) 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.