Flight number record

DL 1582

Delta Air Lines · Salt Lake City to Sacramento

Route: SLC → SMF
Departs: 22:59
Flights: 349
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 349 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 1582's record is 11 points better than the US average of 77.6%. That gap is worth roughly 114 fewer late arrivals for every thousand flights.

On time

89.0%

Arrivals under 15 minutes late, of 346 completed flights

Avg delay

43 min

Across delayed arrivals only, not all flights

Cancelled

0.86%

National rate is 1.81%

1 hour+ late

2.6%

National rate is 8.1%

These figures cover 349 flights between July 2025 and June 2026. The median arrival is 9 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.

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 66 of 349 flights, with 22:50 (39 flights) and 21:30 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:5966 flights18.9%
Departs 22:5039 flights11.2%
Departs 21:3035 flights10.0%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 70.5%, 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.

Against the route

DL 1582 next to SLC to SMF

Every carrier on SLC to SMF combined arrived on time 85.7% of the time across 2,158 flights, so DL 1582 is 3 points ahead of it. Delta flew 1,509 flights on the same city pair under all its flight numbers, including this one, and those ran 87.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 1582 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1582thin sample	349	89.0%	43 min	0.86%	A+
All Delta Air Lines on SLC–SMF	1,509	87.3%	63 min	0.86%	A+
All carriers on SLC–SMF	2,158	85.7%	61 min	0.70%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1582 quarter by quarter

Quarter by quarter DL 1582 held fairly steady: 88.0% in Jul–Sep 2025, 91.1% in Oct–Dec 2025, 89.4% in Jan–Mar 2026 and 87.8% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights88.0%
Oct–Dec 202580 flights91.1%
Jan–Mar 202686 flights89.4%
Apr–Jun 202691 flights87.8%

Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1582 ranged from 83.3% on Saturday to 94.1% on Tuesday. With about 50 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 1582 runs late

One category carries most of the weight here. Carrier accounts for 64% of the 1,630 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
64%
Late-arriving aircraft
24%
National Airspace System
10%
Extreme weather
3%

The largest share of delay minutes, 64%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,037 of the 1,630 delay minutes reported here. The split is drawn from 1,630 delay minutes reported on DL 1582.

Cancellations are rare at 0.86%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.6% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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 0.86% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures