Flight number record
DL 1610
Delta Air Lines · Louisville to Atlanta
- Route
- SDF → ATL
- Departs
- 07:05
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. 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 77.3%. That gap is worth roughly 151 fewer late arrivals for every thousand flights.
Key figures
On time
92.4%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
144 min
Across delayed arrivals only, not all flights
Cancelled
1.66%
National rate is 1.89%
1 hour+ late
4.2%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 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.
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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 196 of 361 flights.
- Departs 07:05196 flights54.3%
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 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 92.4%. 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 1610 next to SDF to ATL
Every carrier on SDF to ATL combined arrived on time 89.6% of the time across 2,710 flights, so DL 1610 is 3 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1610thin sample | 361 | 92.4% | 144 min | 1.66% | A |
| All Delta Air Lines on SDF–ATL | 2,710 | 89.6% | 89 min | 1.55% | A |
| All carriers on SDF–ATL | 2,710 | 89.6% | 89 min | 1.55% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1610 quarter by quarter
Quarter by quarter DL 1610 held fairly steady: 96.7% in Jul–Sep 2025, 88.5% in Oct–Dec 2025, 92.0% in Jan–Mar 2026, 94.4% in Apr–Jun 2026 and 93.4% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202588 flights88.5%
- Jan–Mar 202690 flights92.0%
- Apr–Jun 202691 flights94.4%
- Jul–Sep 202662 flights93.4%
Scale runs 80% to 100%.
By weekday, DL 1610 ranged from 86.3% on Monday to 96.0% on Friday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1610 runs when it is late
DL 1610 often beats the schedule: 229 of 354 completed flights, 65%, arrived 15 minutes or more early. When DL 1610 is late it tends to be very late: 15 of its 27 late arrivals were an hour or more behind, and 10 were two hours or more.
- 15+ min early229 flights64.7%
- Within 15 min98 flights27.7%
- 15–29 min late7 flights2.0%
- 30–59 min late5 flights1.4%
- 1–2 hours late5 flights1.4%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 20 departures that left 15 minutes late or more, only 2 made it up before arrival. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 1610
The latest arrival of the period was on 7 December 2025, 10 hours 28 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 December 2025 | 10 hours 28 minutes | National Airspace System |
| 8 December 2025 | 8 hours 29 minutes | Carrier |
| 25 January 2026 | 7 hours 45 minutes | Extreme weather |
| 26 December 2025 | 5 hours 1 minute | Carrier |
| 24 January 2026 | 4 hours 13 minutes | Extreme weather |
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 3,879 reported delay minutes.
- 37%Carrier
- 36%National Airspace System
- 18%Extreme weather
- 10%Late-arriving aircraft
Extreme weather accounts for 18% 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 2.9 times the usual weather exposure. The split is drawn from 3,879 delay minutes reported on DL 1610.
Cancellations sit at 1.66% against a national 1.89%, 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 4.2% 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.
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 92.4% on time with 1.66% cancelled over 361 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SDF to ATL, every carrier and departure
- ATL to SDF, the return direction
- Delta Air Lines 1481 on the same route89.4%
- Delta Air Lines 1374 on the same route90.6%
- Delta Air Lines 2407 on the same route92.0%
- 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.