Flight number record
DL 2236
Delta Air Lines · Salt Lake City to Detroit
- Route
- SLC → DTW
- Departs
- 09:42
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2236, check with Delta Air Lines.
DL 2236 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 365 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 2236's record is 16 points better than the US average of 77.3%. That gap is worth roughly 161 fewer late arrivals for every thousand flights.
Key figures
On time
93.4%
Arrivals under 15 minutes late, of 365 completed flights
Avg delay
39 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.4%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 10 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 2236 flies
DL 2236 flies SLC to DTW without a single fixed slot. Its most common scheduled departure was 09:42, used on 67 of 365 flights, with 09:45 (57 flights) and 09:40 (40 flights) next.
- Departs 09:4267 flights18.4%
- Departs 09:4557 flights15.6%
- Departs 09:4040 flights11.0%
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 09:42 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2236 runs 10 points better at 93.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2236 next to SLC to DTW
Every carrier on SLC to DTW combined arrived on time 88.2% of the time across 1,530 flights, so DL 2236 is 5 points ahead of it. Delta flew 1,528 flights on the same city pair under all its flight numbers, including this one, and those ran 88.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2236 | 365 | 93.4% | 39 min | 0.00% | A+ |
| All Delta Air Lines on SLC–DTW | 1,528 | 88.2% | 60 min | 0.13% | A+ |
| All carriers on SLC–DTW | 1,530 | 88.2% | 60 min | 0.13% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2236 quarter by quarter
DL 2236 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.7% on time and its weakest Jul–Sep 2025 at 86.7%, a swing of 10 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 flights86.7%
- Oct–Dec 202592 flights93.5%
- Jan–Mar 202690 flights95.6%
- Apr–Jun 202691 flights96.7%
- Jul–Sep 202662 flights88.7%
Scale runs 80% to 100%.
By weekday, DL 2236 ranged from 88.5% on Saturday to 100.0% on Thursday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2236 runs when it is late
DL 2236 often beats the schedule: 127 of 365 completed flights, 35%, arrived 15 minutes or more early. Most of the lateness is short. 16 of the 24 late arrivals were under half an hour behind, and 5 reached an hour or more. Not one arrived two hours late.
- 15+ min early127 flights34.8%
- Within 15 min214 flights58.6%
- 15–29 min late16 flights4.4%
- 30–59 min late3 flights0.8%
- 1–2 hours late5 flights1.4%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 365 completed flights by arrival against schedule.
Only 18 of 365 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for DL 2236
The latest arrival of the period was on 5 December 2025, 1 hour 56 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. 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 |
|---|---|---|
| 5 December 2025 | 1 hour 56 minutes | Late-arriving aircraft |
| 7 December 2025 | 1 hour 54 minutes | Carrier |
| 26 June 2026 | 1 hour 54 minutes | Carrier |
| 18 July 2026 | 1 hour 41 minutes | Carrier |
| 26 November 2025 | 1 hour 6 minutes | Late-arriving aircraft |
Delay causes
Why DL 2236 runs late
Carrier accounts for 48% of the 945 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 30%National Airspace System
- 22%Late-arriving aircraft
The largest share of delay minutes, 48%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 449 of the 945 delay minutes reported here. The split is drawn from 945 delay minutes reported on DL 2236.
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
Badly late arrivals are rare here: only 1.4% 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.
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 365 flights under DL 2236 in the data flew SLC to DTW. 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. 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.
What to do with this
Booking DL 2236
For a booking, DL 2236 has one of the better records a US domestic flight can show: 93.4% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to DTW, every carrier and departure
- DTW to SLC, the return direction
- Delta Air Lines 2289 on the same route93.7%
- Delta Air Lines 2244 on the same route88.4%
- Delta Air Lines 2255 on the same route79.0%
- Salt Lake City International (SLC) delay statistics
- Detroit Metropolitan Wayne County (DTW) 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.