Flight number record
DL 1745
Delta Air Lines · Denver to Detroit
- Route
- DEN → DTW
- Departs
- 06:05
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1745, check with Delta Air Lines.
DL 1745 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 11 minutes early.
Set against the rest of the country, DL 1745's record is 14 points better than the US average of 77.3%. That gap is worth roughly 136 fewer late arrivals for every thousand flights.
Key figures
On time
90.9%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
3.0%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 11 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 1745 flies
DL 1745 flies DEN to DTW without a single fixed slot. Its most common scheduled departure was 06:05, used on 152 of 365 flights, with 06:10 (84 flights) and 05:45 (69 flights) next.
- Departs 06:05152 flights41.6%
- Departs 06:1084 flights23.0%
- Departs 05:4569 flights18.9%
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 06:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1745 runs level with that at 90.9%. 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 1745 next to DEN to DTW
Every carrier on DEN to DTW combined arrived on time 78.1% of the time across 3,109 flights, so DL 1745 is 13 points ahead of it. Delta flew 1,247 flights on the same city pair under all its flight numbers, including this one, and those ran 86.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1745 | 365 | 90.9% | 93 min | 0.27% | A+ |
| All Delta Air Lines on DEN–DTW | 1,247 | 86.8% | 79 min | 0.32% | A+ |
| All carriers on DEN–DTW | 3,109 | 78.1% | 66 min | 0.55% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1745 quarter by quarter
Quarter by quarter DL 1745 held fairly steady: 90.0% in Jul–Sep 2025, 87.9% in Oct–Dec 2025, 86.7% in Jan–Mar 2026, 95.6% in Apr–Jun 2026 and 95.2% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights87.9%
- Jan–Mar 202690 flights86.7%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202662 flights95.2%
Scale runs 80% to 100%.
By weekday, DL 1745 ranged from 86.5% on Saturday to 96.2% on Tuesday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1745 runs when it is late
DL 1745 often beats the schedule: 138 of 364 completed flights, 38%, arrived 15 minutes or more early. The 33 late arrivals split 16 under half an hour, 6 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early138 flights37.9%
- Within 15 min193 flights53.0%
- 15–29 min late16 flights4.4%
- 30–59 min late6 flights1.6%
- 1–2 hours late4 flights1.1%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
6 of 23 late departures made up the time and arrived on time, 26% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for DL 1745
The latest arrival of the period was on 17 April 2026, 8 hours 33 minutes behind schedule; most of its delay minutes were filed as extreme weather. 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 |
|---|---|---|
| 17 April 2026 | 8 hours 33 minutes | Extreme weather |
| 2 January 2026 | 5 hours 28 minutes | Carrier |
| 15 October 2025 | 5 hours 12 minutes | Carrier |
| 26 January 2026 | 4 hours 59 minutes | Late-arriving aircraft |
| 17 March 2026 | 4 hours 57 minutes | Carrier |
Delay causes
Why DL 1745 runs late
Carrier accounts for 61% of the 3,060 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 15%Extreme weather
- 14%National Airspace System
- 10%Late-arriving aircraft
Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 3,060 delay minutes reported on DL 1745.
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 3.0% 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 1,123 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 1745 in the data flew DEN 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 1745
For a booking, DL 1745 has one of the better records a US domestic flight can show: 90.9% on time and 0.27% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DEN to DTW, every carrier and departure
- DTW to DEN, the return direction
- United Airlines 1220 on the same route69.3%
- Delta Air Lines 2787 on the same route84.3%
- Denver International (DEN) 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.