Flight number record
DL 1126
Delta Air Lines · Atlanta to Louisville
- Route
- ATL → SDF
- Departs
- 16:25
- Flights
- 252
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1126, check with Delta Air Lines.
DL 1126 lands a B+, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 252 flights, with a median arrival 4 minutes early.
Key figures
On time
78.0%
Arrivals under 15 minutes late, of 250 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
0.79%
National rate is 1.89%
1 hour+ late
8.4%
National rate is 8.3%
These figures cover 252 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 1126 flies
DL 1126 flies ATL to SDF without a single fixed slot. Its most common scheduled departure was 16:25, used on 52 of 252 flights, with 15:44 (45 flights) and 15:15 (31 flights) next.
- Departs 16:2552 flights20.6%
- Departs 15:4445 flights17.9%
- Departs 15:1531 flights12.3%
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 16:25 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1126 runs 6 points better at 78.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1126 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 1126 is 6 points behind it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1126thin sample | 252 | 78.0% | 62 min | 0.79% | 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 1126 quarter by quarter
Quarter by quarter DL 1126 held fairly steady: 78.2% in Jan–Mar 2026, 80.2% in Apr–Jun 2026 and 72.6% 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.
- Oct–Dec 202511 flights—
- Jan–Mar 202688 flights78.2%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights72.6%
Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1126 did best on Monday at 89.2% on time and worst on Sunday at 62.9%. Each day rests on about 36 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1126 runs when it is late
The 55 late arrivals split 19 under half an hour, 15 between 30 and 60 minutes, and 21 an hour or more.
- 15+ min early40 flights16.0%
- Within 15 min155 flights62.0%
- 15–29 min late19 flights7.6%
- 30–59 min late15 flights6.0%
- 1–2 hours late14 flights5.6%
- 2+ hours late7 flights2.8%
Scale runs 0% to 100%.
Share of 250 completed flights by arrival against schedule.
11 of 52 late departures made up the time and arrived on time, 21% of them. In the other direction, 14 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SDF.
The worst days
Worst days for DL 1126
The latest arrival of the period was on 3 July 2026, 3 hours 41 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 July 2026 | 3 hours 41 minutes | Late-arriving aircraft |
| 4 August 2026 | 3 hours 9 minutes | Late-arriving aircraft |
| 24 January 2026 | 3 hours 2 minutes | Carrier |
| 16 March 2026 | 2 hours 54 minutes | Late-arriving aircraft |
| 14 June 2026 | 2 hours 50 minutes | Late-arriving aircraft |
Delay causes
Why DL 1126 runs late
Carrier accounts for 52% of the 3,417 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 23%Late-arriving aircraft
- 20%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,777 of the 3,417 delay minutes reported here. The split is drawn from 3,417 delay minutes reported on DL 1126.
Cancellations are rare at 0.79%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.4% 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 about an hour, which a normal layover absorbs.
The same number turns up on two other city pairs in the data, including SDF to ATL (215) and MCO to JFK (109), but none flew often enough under DL 1126 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to SDF only.
One caution: this is a thin sample. 252 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 1126
For a booking, DL 1126 is one of the weaker ways to fly ATL to SDF: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
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 2624 on the same route83.3%
- Delta Air Lines 1374 on the same route89.2%
- Delta Air Lines 3093 on the same route77.8%
- 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.