Flight number record
DL 1005
Delta Air Lines · Atlanta to Detroit
- Route
- ATL → DTW
- Departs
- 15:15
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1005, check with Delta Air Lines.
DL 1005 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 362 flights, with a median arrival 2 minutes early.
Key figures
On time
75.2%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
9.2%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1005 flies
DL 1005 flies ATL to DTW without a single fixed slot. Its most common scheduled departure was 15:15, used on 68 of 362 flights, with 14:59 (57 flights) and 15:28 (57 flights) next.
- Departs 15:1568 flights18.8%
- Departs 14:5957 flights15.7%
- Departs 15:2857 flights15.7%
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 15:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1005 runs 3 points better at 75.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1005 next to ATL to DTW
Every carrier on ATL to DTW combined arrived on time 76.4% of the time across 4,821 flights, so DL 1005 is about level with it. Delta flew 3,774 flights on the same city pair under all its flight numbers, including this one, and those ran 77.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1005thin sample | 362 | 75.2% | 62 min | 0.55% | B+ |
| All Delta Air Lines on ATL–DTW | 3,774 | 77.9% | 60 min | 0.50% | B+ |
| All carriers on ATL–DTW | 4,821 | 76.4% | 64 min | 0.81% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1005 quarter by quarter
DL 1005 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.6% on time and its weakest Jul–Sep 2026 at 37.1%, a swing of 51 points on roughly 72 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 202590 flights84.4%
- Jan–Mar 202689 flights88.6%
- Apr–Jun 202691 flights75.3%
- Jul–Sep 202662 flights37.1%
Scale runs 30% to 95%.
By weekday, DL 1005 did best on Wednesday at 90.4% on time and worst on Saturday at 64.0%. Each day rests on about 52 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1005 runs when it is late
The 89 late arrivals split 36 under half an hour, 20 between 30 and 60 minutes, and 33 an hour or more.
- 15+ min early45 flights12.5%
- Within 15 min225 flights62.7%
- 15–29 min late36 flights10.0%
- 30–59 min late20 flights5.6%
- 1–2 hours late22 flights6.1%
- 2+ hours late11 flights3.1%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
20 of 95 late departures made up the time and arrived on time, 21% of them. 14 flights left on time and still arrived late.
The worst days
Worst days for DL 1005
The latest arrival of the period was on 3 July 2026, 5 hours 24 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Four of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 July 2026 | 5 hours 24 minutes | Carrier |
| 2 July 2026 | 5 hours 3 minutes | Carrier |
| 24 July 2026 | 4 hours 19 minutes | Late-arriving aircraft |
| 22 May 2026 | 4 hours 13 minutes | Carrier |
| 28 July 2026 | 2 hours 38 minutes | Extreme weather |
Delay causes
Why DL 1005 runs late
Carrier accounts for 45% of the 5,496 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 31%Late-arriving aircraft
- 18%National Airspace System
- 6%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,457 of the 5,496 delay minutes reported here. The split is drawn from 5,496 delay minutes reported on DL 1005.
Cancellations are rare at 0.55%, 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
9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 594 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 362 flights under DL 1005 in the data flew ATL 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. 362 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 1005
For a booking, read DL 1005 as 75.2% on time with 0.55% cancelled over 362 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to DTW, every carrier and departure
- DTW to ATL, the return direction
- Delta Air Lines 1298 on the same route84.3%
- Delta Air Lines 1031 on the same route83.9%
- Delta Air Lines 1240 on the same route82.7%
- Delta Air Lines 1646 on the same route90.6%
- Delta Air Lines 2940 on the same route72.6%
- Delta Air Lines 2067 on the same route74.6%
- Hartsfield-Jackson Atlanta International (ATL) 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
- How often a connection fails at the major US hubs
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.