Flight number record
DL 1662
Delta Air Lines · Salt Lake City to Las Vegas
- Route
- SLC → LAS
- Departs
- 22:50
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1662, check with Delta Air Lines.
DL 1662 lands a B+, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 364 flights, with a median arrival 6 minutes early.
Key figures
On time
79.6%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 6 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 1662 flies
DL 1662 flies SLC to LAS without a single fixed slot. Its most common scheduled departure was 22:50, used on 38 of 364 flights.
- Departs 22:5038 flights10.4%
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 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1662 runs 10 points better at 79.6%. 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 1662 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 1662 is 2 points ahead of 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 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1662thin sample | 364 | 79.6% | 48 min | 0.27% | B+ |
| 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 1662 quarter by quarter
DL 1662 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.5% on time and its weakest Jul–Sep 2026 at 71.0%, a swing of 17 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 flights83.3%
- Oct–Dec 202591 flights83.5%
- Jan–Mar 202690 flights87.5%
- Apr–Jun 202691 flights72.5%
- Jul–Sep 202662 flights71.0%
Scale runs 65% to 95%.
By weekday, DL 1662 did best on Wednesday at 88.5% on time and worst on Sunday at 71.2%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1662 runs when it is late
Most of the lateness is short. 38 of the 74 late arrivals were under half an hour behind, and 16 reached an hour or more.
- 15+ min early90 flights24.9%
- Within 15 min198 flights54.7%
- 15–29 min late38 flights10.5%
- 30–59 min late20 flights5.5%
- 1–2 hours late15 flights4.1%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
16 of 64 late departures made up the time and arrived on time, 25% of them. In the other direction, 26 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 1662
The latest arrival of the period was on 3 May 2026, 8 hours 46 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 May 2026 | 8 hours 46 minutes | Carrier |
| 28 July 2026 | 1 hour 56 minutes | Late-arriving aircraft |
| 13 March 2026 | 1 hour 40 minutes | Carrier |
| 16 July 2026 | 1 hour 36 minutes | National Airspace System |
| 18 May 2026 | 1 hour 35 minutes | Carrier |
Delay causes
Why DL 1662 runs late
Carrier accounts for 60% of the 3,520 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 32%National Airspace System
- 8%Late-arriving aircraft
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,114 of the 3,520 delay minutes reported here. The split is drawn from 3,520 delay minutes reported on DL 1662.
Cancellations are rare at 0.27%, below the national 1.89% 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 4.4% 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.
Every one of the 364 flights under DL 1662 in the data flew SLC to LAS. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 364 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 1662
For a booking, read DL 1662 as 79.6% on time with 0.27% cancelled over 364 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 1672 on the same route72.9%
- 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.