Flight number record

DL 1610

Delta Air Lines · Louisville to Atlanta

Route: SDF → ATL
Departs: 07:05
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1610, check with Delta Air Lines.

DL 1610 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.4 hours. That rests on 361 flights, with a median arrival 19 minutes early.

Set against the rest of the country, DL 1610's record is 15 points better than the US average of 77.6%. That gap is worth roughly 145 fewer late arrivals for every thousand flights.

On time

92.1%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

143 min

Across delayed arrivals only, not all flights

Cancelled

1.66%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 2026. The median arrival is 19 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 1610 flies

DL 1610 flies SDF to ATL without a single fixed slot. Its most common scheduled departure was 07:05, used on 173 of 361 flights, with 07:10 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:05173 flights47.9%
Departs 07:1055 flights15.2%

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 07:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1610 runs 3 points better at 92.1%. 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 1610 next to SDF to ATL

Every carrier on SDF to ATL combined arrived on time 90.0% of the time across 2,707 flights, so DL 1610 is 2 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 90.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 11 points.

DL 1610 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1610thin sample	361	92.1%	143 min	1.66%	A
All Delta Air Lines on SDF–ATL	2,705	90.0%	89 min	1.59%	A
All carriers on SDF–ATL	2,707	90.0%	88 min	1.59%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1610 quarter by quarter

Quarter by quarter DL 1610 held fairly steady: 93.4% in Jul–Sep 2025, 88.5% in Oct–Dec 2025, 92.0% in Jan–Mar 2026 and 94.4% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights93.4%
Oct–Dec 202588 flights88.5%
Jan–Mar 202690 flights92.0%
Apr–Jun 202691 flights94.4%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1610 did best on Saturday at 97.9% on time and worst on Monday at 84.0%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1610 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,994 reported delay minutes.

National Airspace System
35%
Carrier
33%
Extreme weather
17%
Late-arriving aircraft
15%

Extreme weather accounts for 17% 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 2.8 times the usual weather exposure. The split is drawn from 3,994 delay minutes reported on DL 1610.

Cancellations sit at 1.66% against a national 1.81%, which is ordinary. Diversions add another 0.28%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% 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.

Every one of the 361 flights under DL 1610 in the data flew SDF to ATL. 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. 361 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 1610

For a booking, read DL 1610 as 92.1% on time with 1.66% cancelled over 361 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