Flight number record
DL 1672
Delta Air Lines · Salt Lake City to Las Vegas
- Route
- SLC → LAS
- Departs
- 15:45
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 C. About seven flights in ten arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so DL 1672 runs 4 points behind the country as a whole. Across a thousand flights that is about 44 extra late arrivals.
Key figures
On time
72.9%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
8.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 (54 flights) and 15:30 (52 flights) next.
- Departs 15:4565 flights17.8%
- Departs 15:2854 flights14.8%
- Departs 15:3052 flights14.2%
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 15:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1672 runs level with that at 72.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1672 next to SLC to LAS
Every carrier on SLC to LAS combined arrived on time 77.5% of the time across 3,724 flights, so DL 1672 is 5 points behind it. Delta flew 1,716 flights on the same city pair under all its flight numbers, including this one, and those ran 79.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1672 | 365 | 72.9% | 62 min | 1.10% | C |
| All Delta Air Lines on SLC–LAS | 1,716 | 79.0% | 56 min | 0.64% | B+ |
| All carriers on SLC–LAS | 3,724 | 77.5% | 62 min | 0.67% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1672 quarter by quarter
DL 1672 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.0% on time and its weakest Jul–Sep 2025 at 56.7%, a swing of 21 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 flights56.7%
- Oct–Dec 202592 flights76.9%
- Jan–Mar 202690 flights77.3%
- Apr–Jun 202691 flights78.0%
- Jul–Sep 202662 flights60.7%
Scale runs 50% to 85%.
By weekday, DL 1672 did best on Tuesday at 86.5% on time and worst on Sunday at 60.0%. Each day rests on about 52 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1672 runs when it is late
The 98 late arrivals split 32 under half an hour, 34 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early40 flights11.1%
- Within 15 min223 flights61.8%
- 15–29 min late32 flights8.9%
- 30–59 min late34 flights9.4%
- 1–2 hours late18 flights5.0%
- 2+ hours late14 flights3.9%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
12 of 86 late departures made up the time and arrived on time, 14% of them. In the other direction, 24 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at LAS.
The worst days
Worst days for DL 1672
The latest arrival of the period was on 10 October 2025, 7 hours 25 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 October 2025 | 7 hours 25 minutes | National Airspace System |
| 18 February 2026 | 3 hours 26 minutes | Extreme weather |
| 13 July 2026 | 3 hours 23 minutes | Carrier |
| 13 May 2026 | 3 hours 12 minutes | Carrier |
| 4 January 2026 | 2 hours 45 minutes | Carrier |
Delay causes
Why DL 1672 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,057 reported delay minutes.
- 40%National Airspace System
- 39%Carrier
- 18%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,332 of the 6,057 delay minutes reported here. The split is drawn from 6,057 delay minutes reported on DL 1672.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.9% of arrivals land an hour or more late, close to the national 8.3%, so 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, 75.2% 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| LAS to SLCthin sample | 314 | 75.2% | 71 min | 1.27% | B |
What to do with this
Booking DL 1672
For a booking, read DL 1672 as 72.9% on time with 1.10% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to LAS, every carrier and departure
- LAS to SLC, the return direction
- Delta Air Lines 1659 on the same route74.9%
- Delta Air Lines 1662 on the same route79.6%
- Delta Air Lines 1698 on the same route93.3%
- Frontier Airlines 2575 on the same route79.3%
- Salt Lake City International (SLC) delay statistics
- Harry Reid International (LAS) 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.