Flight number record

DL 1374

Delta Air Lines · Atlanta to Louisville

Route: ATL → SDF
Departs: 08:05
Flights: 337
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. When something does go wrong the average delay runs about an hour. That rests on 337 flights, with a median arrival 10 minutes early.

Set against the rest of the country, DL 1374's record is 12 points better than the US average of 77.6%. That gap is worth roughly 118 fewer late arrivals for every thousand flights.

On time

89.4%

Arrivals under 15 minutes late, of 329 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

2.37%

National rate is 1.81%

1 hour+ late

2.7%

National rate is 8.1%

These figures cover 337 flights between July 2025 and June 2026. The median arrival is 10 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 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 337 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:0572 flights21.4%

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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1374 runs 5 points better at 89.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1374 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 1374 is 5 points ahead of 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 8 points.

DL 1374 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1374thin sample	337	89.4%	55 min	2.37%	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 1374 quarter by quarter

DL 1374 did not run the same all year. Its best quarter was Jul–Sep 2025 at 95.5% on time and its weakest Oct–Dec 2025 at 83.8%, a swing of 12 points on roughly 84 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 202588 flights95.5%
Oct–Dec 202575 flights83.8%
Jan–Mar 202686 flights88.8%
Apr–Jun 202688 flights88.5%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1374 ranged from 81.6% on Wednesday to 93.5% on Sunday. With about 48 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.

Delay causes

Why DL 1374 runs late

One category carries most of the weight here. Carrier accounts for 52% of the 1,939 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
52%
Extreme weather
24%
National Airspace System
17%
Late-arriving aircraft
7%

Extreme weather accounts for 24% 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 3.9 times the usual weather exposure. The split is drawn from 1,939 delay minutes reported on DL 1374.

Cancellations sit at 2.37% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.7% land an hour or more behind schedule, against 8.1% 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 (300 flights, 91.5% 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. 337 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.

Other routes flown as DL 1374
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SDF to ATLthin sample	300	91.5%	68 min	2.00%	A

What to do with this

Booking DL 1374

For a booking, read DL 1374 as 89.4% on time with 2.37% cancelled over 337 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