Flight number record

DL 765

Delta Air Lines · Detroit to Salt Lake City

Route: DTW → SLC
Departs: 17:55
Flights: 352
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 765, check with Delta Air Lines.

DL 765 lands a B+, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 352 flights, with a median arrival 1 minute early.

On time

76.4%

Arrivals under 15 minutes late, of 351 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.81%

1 hour+ late

7.7%

National rate is 8.1%

These figures cover 352 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.

Schedule

When DL 765 flies

DL 765 flies DTW to SLC without a single fixed slot. Its most common scheduled departure was 17:55, used on 101 of 352 flights, with 17:40 (77 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:55101 flights28.7%
Departs 17:4077 flights21.9%

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 17:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 765 runs 8 points better at 76.4%. 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 765 next to DTW to SLC

Every carrier on DTW to SLC combined arrived on time 80.4% of the time across 1,574 flights, so DL 765 is 4 points behind it. Delta flew 1,546 flights on the same city pair under all its flight numbers, including this one, and those ran 80.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 5 points.

DL 765 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 765thin sample	352	76.4%	60 min	0.28%	B+
All Delta Air Lines on DTW–SLC	1,546	80.0%	59 min	0.19%	B+
All carriers on DTW–SLC	1,574	80.4%	59 min	0.19%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 765 quarter by quarter

Quarter by quarter DL 765 held fairly steady: 78.0% in Jul–Sep 2025, 75.8% in Oct–Dec 2025, 70.5% in Jan–Mar 2026 and 80.2% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights78.0%
Oct–Dec 202591 flights75.8%
Jan–Mar 202678 flights70.5%
Apr–Jun 202691 flights80.2%

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

By weekday, DL 765 did best on Friday at 82.7% on time and worst on Thursday at 66.7%. Each day rests on about 50 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 765 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 4,968 reported delay minutes.

Carrier
42%
Late-arriving aircraft
33%
National Airspace System
18%
Extreme weather
8%

The largest share of delay minutes, 42%, 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 2,064 of the 4,968 delay minutes reported here. The split is drawn from 4,968 delay minutes reported on DL 765.

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

7.7% 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 1,481 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.

Every one of the 352 flights under DL 765 in the data flew DTW to SLC. 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. 352 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 765

For a booking, read DL 765 as 76.4% on time with 0.28% cancelled over 352 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