Flight number record

DL 1662

Delta Air Lines · Salt Lake City to Las Vegas

Route: SLC → LAS
Departs: 22:59
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1662, check with Delta Air Lines.

DL 1662 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 6 minutes early.

On time

80.4%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

46 min

Across delayed arrivals only, not all flights

Cancelled

0.27%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 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.

Schedule

When DL 1662 flies

DL 1662 flies SLC to LAS without a single fixed slot. Its most common scheduled departure was 22:59, used on 66 of 364 flights, with 22:50 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:5966 flights18.1%
Departs 22:5038 flights10.4%

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 1662 runs 10 points better at 80.4%. 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 1662 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 1662 is 3 points ahead of 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%, close to this flight's figure.

DL 1662 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1662thin sample	364	80.4%	46 min	0.27%	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 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 Apr–Jun 2026 at 72.5%, a swing of 15 points on roughly 91 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 202592 flights78.3%
Oct–Dec 202591 flights83.5%
Jan–Mar 202690 flights87.5%
Apr–Jun 202691 flights72.5%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1662 did best on Wednesday at 90.4% on time and worst on Thursday at 69.4%. Each day rests on about 52 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1662 runs late

One category carries most of the weight here. Carrier accounts for 62% of the 3,279 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
62%
National Airspace System
30%
Late-arriving aircraft
8%

The largest share of delay minutes, 62%, 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 2,025 of the 3,279 delay minutes reported here. The split is drawn from 3,279 delay minutes reported on DL 1662.

Cancellations are rare at 0.27%, 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 3.9% 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.

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 80.4% on time with 0.27% cancelled over 364 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