Flight number record

DL 2624

Delta Air Lines · Atlanta to Louisville

Route: ATL → SDF
Departs: 22:40
Flights: 339
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2624, check with Delta Air Lines.

DL 2624 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 339 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 2624's record is 8 points better than the US average of 77.6%. That gap is worth roughly 76 fewer late arrivals for every thousand flights.

On time

85.2%

Arrivals under 15 minutes late, of 332 completed flights

Avg delay

98 min

Across delayed arrivals only, not all flights

Cancelled

2.06%

National rate is 1.81%

1 hour+ late

5.7%

National rate is 8.1%

These figures cover 339 flights between July 2025 and June 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.

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 339 flights, with 22:35 (47 flights) and 23:05 (46 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:4090 flights26.5%
Departs 22:3547 flights13.9%
Departs 23:0546 flights13.6%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 70.5%, and DL 2624 runs 15 points better at 85.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 2624 next to ATL to SDF

Every carrier on ATL to SDF combined arrived on time 84.9% of the time across 2,707 flights, so DL 2624 is about level with it. Delta flew 2,705 flights on the same city pair under all its flight numbers, including this one, and those ran 84.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.

DL 2624 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2624thin sample	339	85.2%	98 min	2.06%	A
All Delta Air Lines on ATL–SDF	2,705	84.9%	64 min	1.52%	B
All carriers on ATL–SDF	2,707	84.9%	64 min	1.51%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 2025 at 78.3%, a swing of 11 points on roughly 85 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 202570 flights78.3%
Oct–Dec 202588 flights84.7%
Jan–Mar 202690 flights87.5%
Apr–Jun 202691 flights88.9%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2624 did best on Saturday at 96.1% on time and worst on Monday at 77.6%. Each day rests on about 48 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2624 runs late

One category carries most of the weight here. Carrier accounts for 59% of the 4,822 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
59%
National Airspace System
23%
Late-arriving aircraft
16%
Security
1%
Extreme weather
1%

The largest share of delay minutes, 59%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,863 of the 4,822 delay minutes reported here. The split is drawn from 4,822 delay minutes reported on DL 2624.

Cancellations sit at 2.06% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

Every one of the 339 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. 339 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 85.2% on time with 2.06% cancelled over 339 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures