Flight number record

DL 1672

Delta Air Lines · Salt Lake City to Las Vegas

Route: SLC → LAS
Departs: 15:45
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1672, check with Delta Air Lines.

DL 1672 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival 1 minute early.

On time

75.4%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

8.3%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 8.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 1672 flies

DL 1672 flies SLC to LAS without a single fixed slot. Its most common scheduled departure was 15:45, used on 65 of 365 flights, with 15:28 (49 flights) and 15:50 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:4565 flights17.8%
Departs 15:2849 flights13.4%
Departs 15:5041 flights11.2%

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 15:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 1672 runs 3 points better at 75.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1672 next to SLC to LAS

Every carrier on SLC to LAS combined arrived on time 77.9% of the time across 3,741 flights, so DL 1672 is 3 points behind it. Delta flew 1,714 flights on the same city pair under all its flight numbers, including this one, and those ran 80.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 6 points.

DL 1672 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1672	365	75.4%	65 min	0.82%	B+
All Delta Air Lines on SLC–LAS	1,714	80.2%	57 min	0.58%	B+
All carriers on SLC–LAS	3,741	77.9%	64 min	0.64%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1672 quarter by quarter

Quarter by quarter DL 1672 held fairly steady: 69.6% in Jul–Sep 2025, 76.9% in Oct–Dec 2025, 77.3% in Jan–Mar 2026 and 78.0% in Apr–Jun 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 202592 flights69.6%
Oct–Dec 202592 flights76.9%
Jan–Mar 202690 flights77.3%
Apr–Jun 202691 flights78.0%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1672 did best on Saturday at 86.3% on time and worst on Sunday at 62.7%. Each day rests on about 52 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1672 runs late

One category carries most of the weight here. National Airspace System accounts for 44% of the 5,744 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.

National Airspace System
44%
Carrier
37%
Late-arriving aircraft
17%
Extreme weather
3%

The largest share of delay minutes, 37%, 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 2,103 of the 5,744 delay minutes reported here. The split is drawn from 5,744 delay minutes reported on DL 1672.

Cancellations are rare at 0.82%, 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

8.3% 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.

DL 1672 is not only a SLC to LAS flight. It also flew LAS to SLC (314 flights, 75.6% 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. 365 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 1672
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
LAS to SLCthin sample	314	75.6%	63 min	0.96%	B+

What to do with this

Booking DL 1672

For a booking, read DL 1672 as 75.4% on time with 0.82% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular 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