Flight number record
DL 765
Delta Air Lines · Detroit to Salt Lake City
- Route
- DTW → SLC
- Departs
- 17:40
- Flights
- 352
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 765, check with Delta Air Lines.
DL 765 lands a B+, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 352 flights, with a median arrival 1 minute early.
Key figures
On time
76.7%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
8.2%
National rate is 8.3%
These figures cover 352 flights between September 2025 and August 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 765 flies
DL 765 flies DTW to SLC without a single fixed slot. Its most common scheduled departure was 17:40, used on 115 of 352 flights, with 17:55 (74 flights) next.
- Departs 17:40115 flights32.7%
- Departs 17:5574 flights21.0%
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 17:40 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 765 runs 9 points better at 76.7%. 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 765 next to DTW to SLC
Every carrier on DTW to SLC combined arrived on time 79.6% of the time across 1,535 flights, so DL 765 is 3 points behind it. Delta flew 1,533 flights on the same city pair under all its flight numbers, including this one, and those ran 79.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 765thin sample | 352 | 76.7% | 60 min | 0.00% | B+ |
| All Delta Air Lines on DTW–SLC | 1,533 | 79.6% | 60 min | 0.13% | B+ |
| All carriers on DTW–SLC | 1,535 | 79.6% | 60 min | 0.13% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 765 quarter by quarter
DL 765 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 70.5%, a swing of 26 points on roughly 70 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 flights96.7%
- Oct–Dec 202591 flights75.8%
- Jan–Mar 202678 flights70.5%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights71.0%
Scale runs 60% to 100%.
By weekday, DL 765 did best on Friday at 84.6% on time and worst on Thursday at 68.6%. Each day rests on about 50 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 765 runs when it is late
The 82 late arrivals split 32 under half an hour, 21 between 30 and 60 minutes, and 29 an hour or more.
- 15+ min early56 flights15.9%
- Within 15 min214 flights60.8%
- 15–29 min late32 flights9.1%
- 30–59 min late21 flights6.0%
- 1–2 hours late21 flights6.0%
- 2+ hours late8 flights2.3%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 67 departures that left 15 minutes late or more, only 6 made it up before arrival. In the other direction, 21 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 SLC.
The worst days
Worst days for DL 765
The latest arrival of the period was on 19 May 2026, 6 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 |
|---|---|---|
| 19 May 2026 | 6 hours 46 minutes | Carrier |
| 9 July 2026 | 4 hours 40 minutes | Late-arriving aircraft |
| 19 December 2025 | 3 hours 3 minutes | Late-arriving aircraft |
| 14 June 2026 | 2 hours 42 minutes | Carrier |
| 22 August 2026 | 2 hours 40 minutes | Carrier |
Delay causes
Why DL 765 runs late
Carrier accounts for 44% of the 4,881 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 30%Late-arriving aircraft
- 19%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,170 of the 4,881 delay minutes reported here. The split is drawn from 4,881 delay minutes reported on DL 765.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.2% 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.
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.
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 76.7% on time with 0.00% cancelled over 352 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to SLC, every carrier and departure
- SLC to DTW, the return direction
- Delta Air Lines 698 on the same route87.9%
- Delta Air Lines 935 on the same route87.4%
- Delta Air Lines 2117 on the same route64.6%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Salt Lake City International (SLC) 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.