Flight number record
DL 2624
Delta Air Lines · Atlanta to Louisville
- Route
- ATL → SDF
- Departs
- 22:40
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2624, check with Delta Air Lines.
DL 2624 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 348 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 2624's record is 6 points better than the US average of 77.3%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.
Key figures
On time
83.3%
Arrivals under 15 minutes late, of 342 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
1.72%
National rate is 1.89%
1 hour+ late
5.8%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. The median arrival is 8 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 2624 flies
DL 2624 flies ATL to SDF without a single fixed slot. Its most common scheduled departure was 22:40, used on 90 of 348 flights, with 23:05 (51 flights) and 22:35 (35 flights) next.
- Departs 22:4090 flights25.9%
- Departs 23:0551 flights14.7%
- Departs 22:3535 flights10.1%
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 22:40 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2624 runs 13 points better at 83.3%. 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 2624 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 2624 is about level with it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2624thin sample | 348 | 83.3% | 72 min | 1.72% | B |
| 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 2624 quarter by quarter
DL 2624 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.9% on time and its weakest Jul–Sep 2026 at 67.7%, a swing of 21 points on roughly 87 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 202517 flights—
- Oct–Dec 202588 flights84.7%
- Jan–Mar 202690 flights87.5%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights67.7%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2624 did best on Wednesday at 91.5% on time and worst on Monday at 78.4%. Each day rests on about 50 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2624 runs when it is late
The 57 late arrivals split 15 under half an hour, 22 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early84 flights24.6%
- Within 15 min201 flights58.8%
- 15–29 min late15 flights4.4%
- 30–59 min late22 flights6.4%
- 1–2 hours late14 flights4.1%
- 2+ hours late6 flights1.8%
Scale runs 0% to 100%.
Share of 342 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 51 departures that left 15 minutes late or more, only 6 made it up before arrival. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 2624
The latest arrival of the period was on 25 May 2026, 9 hours 28 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 |
|---|---|---|
| 25 May 2026 | 9 hours 28 minutes | Carrier |
| 4 November 2025 | 9 hours 3 minutes | National Airspace System |
| 29 November 2025 | 2 hours 58 minutes | Late-arriving aircraft |
| 27 August 2026 | 2 hours 26 minutes | Carrier |
| 11 July 2026 | 2 hours 24 minutes | Carrier |
Delay causes
Why DL 2624 runs late
Carrier accounts for 45% of the 4,111 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 29%National Airspace System
- 24%Late-arriving aircraft
- 1%Security
- 1%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,864 of the 4,111 delay minutes reported here. The split is drawn from 4,111 delay minutes reported on DL 2624.
Cancellations sit at 1.72% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.8% 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 a little over an hour, which a normal layover absorbs.
Every one of the 348 flights under DL 2624 in the data flew ATL to SDF. 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. 348 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 2624
For a booking, read DL 2624 as 83.3% on time with 1.72% cancelled over 348 flights. Those are rates from the past twelve months, not a forecast for any particular day.
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 1374 on the same route89.2%
- 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
- 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.