Flight number record
DL 1374
Delta Air Lines · Atlanta to Louisville
- Route
- ATL → SDF
- Departs
- 08:05
- Flights
- 341
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1374, check with Delta Air Lines.
DL 1374 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 341 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 1374's record is 12 points better than the US average of 77.3%. That gap is worth roughly 119 fewer late arrivals for every thousand flights.
Key figures
On time
89.2%
Arrivals under 15 minutes late, of 332 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
2.64%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 341 flights between September 2025 and August 2026. The median arrival is 9 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 1374 flies
DL 1374 flies ATL to SDF without a single fixed slot. Its most common scheduled departure was 08:05, used on 72 of 341 flights, with 09:10 (53 flights) next.
- Departs 08:0572 flights21.1%
- Departs 09:1053 flights15.5%
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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1374 runs 5 points better at 89.2%. 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 1374 next to ATL to SDF
Every carrier on ATL to SDF combined arrived on time 84.3% of the time across 2,710 flights, so DL 1374 is 5 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1374thin sample | 341 | 89.2% | 61 min | 2.64% | A |
| All Delta Air Lines on ATL–SDF | 2,710 | 84.3% | 64 min | 1.48% | B |
| All carriers on ATL–SDF | 2,710 | 84.3% | 64 min | 1.48% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1374 quarter by quarter
DL 1374 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Oct–Dec 2025 at 83.8%, a swing of 16 points on roughly 68 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 flights100.0%
- Oct–Dec 202575 flights83.8%
- Jan–Mar 202686 flights88.8%
- Apr–Jun 202688 flights88.5%
- Jul–Sep 202662 flights91.8%
Scale runs 75% to 100%.
By weekday, DL 1374 ranged from 81.6% on Wednesday to 93.5% on Sunday. With about 49 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 1374 runs when it is late
DL 1374 often beats the schedule: 98 of 332 completed flights, 30%, arrived 15 minutes or more early. The 36 late arrivals split 14 under half an hour, 10 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early98 flights29.5%
- Within 15 min198 flights59.6%
- 15–29 min late14 flights4.2%
- 30–59 min late10 flights3.0%
- 1–2 hours late8 flights2.4%
- 2+ hours late4 flights1.2%
Scale runs 0% to 100%.
Share of 332 completed flights by arrival against schedule.
7 of 36 late departures made up the time and arrived on time, 19% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for DL 1374
The latest arrival of the period was on 7 December 2025, 6 hours 21 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 |
|---|---|---|
| 7 December 2025 | 6 hours 21 minutes | Extreme weather |
| 13 April 2026 | 2 hours 15 minutes | Carrier |
| 5 July 2026 | 2 hours 10 minutes | Carrier |
| 15 December 2025 | 2 hours 5 minutes | Carrier |
| 28 April 2026 | 1 hour 50 minutes | National Airspace System |
Delay causes
Why DL 1374 runs late
Carrier accounts for 57% of the 2,191 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Carrier
- 22%Extreme weather
- 14%National Airspace System
- 7%Late-arriving aircraft
Extreme weather accounts for 22% 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 3.6 times the usual weather exposure. The split is drawn from 2,191 delay minutes reported on DL 1374.
Cancellations run at 2.64%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.6% 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.
DL 1374 is not only a ATL to SDF flight. It also flew SDF to ATL (304 flights, 90.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 341 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SDF to ATLthin sample | 304 | 90.6% | 93 min | 2.30% | A |
What to do with this
Booking DL 1374
For a booking, the cancellation rate is the figure to plan around on DL 1374: 2.64% of its 341 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to SDF, every carrier and departure
- SDF to ATL, the return direction
- Delta Air Lines 1481 on the same route88.8%
- Delta Air Lines 2624 on the same route83.3%
- Delta Air Lines 3093 on the same route77.8%
- Delta Air Lines 1126 on the same route78.0%
- Hartsfield-Jackson Atlanta International (ATL) 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
- What a cancellation rate actually tells you (and what it hides)
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.