Flight number record

DL 1423

Delta Air Lines · Sacramento to Salt Lake City

Route: SMF → SLC
Departs: 13:05
Flights: 358
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1423, check with Delta Air Lines.

DL 1423 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 358 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 1423's record is 10 points better than the US average of 77.6%. That gap is worth roughly 100 fewer late arrivals for every thousand flights.

On time

87.6%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.81%

1 hour+ late

5.3%

National rate is 8.1%

These figures cover 358 flights between July 2025 and June 2026. The median arrival is 10 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 1423 flies

DL 1423 flies SMF to SLC without a single fixed slot. Its most common scheduled departure was 13:05, used on 145 of 358 flights, with 13:30 (127 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:05145 flights40.5%
Departs 13:30127 flights35.5%

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 13:05 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1423 runs 9 points better at 87.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1423 next to SMF to SLC

Every carrier on SMF to SLC combined arrived on time 87.6% of the time across 2,158 flights, so DL 1423 is about level with it. Delta flew 1,509 flights on the same city pair under all its flight numbers, including this one, and those ran 89.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.

DL 1423 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1423thin sample	358	87.6%	57 min	0.28%	A+
All Delta Air Lines on SMF–SLC	1,509	89.7%	80 min	0.86%	A+
All carriers on SMF–SLC	2,158	87.6%	72 min	0.65%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1423 quarter by quarter

Quarter by quarter DL 1423 held fairly steady: 91.3% in Jul–Sep 2025, 82.6% in Oct–Dec 2025, 88.8% in Jan–Mar 2026 and 88.0% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights91.3%
Oct–Dec 202592 flights82.6%
Jan–Mar 202690 flights88.8%
Apr–Jun 202684 flights88.0%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1423 did best on Sunday at 92.3% on time and worst on Saturday at 79.2%. Each day rests on about 51 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1423 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 72% of the 2,492 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.

Late-arriving aircraft
72%
Carrier
23%
National Airspace System
6%

72% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,492 reported delay minutes here, that single category outweighs weather by 72 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,492 delay minutes reported on DL 1423.

Cancellations are rare at 0.28%, 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

5.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

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.

DL 1423 is not only a SMF to SLC flight. It also flew SLC to SMF (358 flights, 86.3% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 358 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.

Other routes flown as DL 1423
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SLC to SMFthin sample	358	86.3%	59 min	0.28%	A+

What to do with this

Booking DL 1423

For a booking, DL 1423 has one of the better records a US domestic flight can show: 87.6% on time and 0.28% 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