Flight number record
DL 1076
Delta Air Lines · Atlanta to Chicago
- Route
- ATL → MDW
- Departs
- 21:15
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1076, check with Delta Air Lines.
DL 1076 lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 365 flights, with a median arrival 3 minutes early.
Key figures
On time
77.1%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
2.47%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 3 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 1076 flies
DL 1076 flies ATL to MDW without a single fixed slot. Its most common scheduled departure was 21:15, used on 70 of 365 flights.
- Departs 21:1570 flights19.2%
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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1076 runs 7 points better at 77.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1076 next to ATL to MDW
Every carrier on ATL to MDW combined arrived on time 75.2% of the time across 3,537 flights, so DL 1076 is 2 points ahead of it. Delta flew 1,359 flights on the same city pair under all its flight numbers, including this one, and those ran 81.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1076 | 365 | 77.1% | 69 min | 2.47% | B |
| All Delta Air Lines on ATL–MDW | 1,359 | 81.9% | 56 min | 2.35% | B |
| All carriers on ATL–MDW | 3,537 | 75.2% | 67 min | 2.04% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1076 quarter by quarter
DL 1076 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.7% on time and its weakest Jul–Sep 2026 at 63.9%, a swing of 23 points on roughly 73 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 202530 flights86.7%
- Oct–Dec 202592 flights84.1%
- Jan–Mar 202690 flights76.7%
- Apr–Jun 202691 flights76.4%
- Jul–Sep 202662 flights63.9%
Scale runs 55% to 90%.
By weekday, DL 1076 did best on Wednesday at 88.5% on time and worst on Thursday at 66.7%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1076 runs when it is late
The 81 late arrivals split 29 under half an hour, 25 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early64 flights18.1%
- Within 15 min209 flights59.0%
- 15–29 min late29 flights8.2%
- 30–59 min late25 flights7.1%
- 1–2 hours late17 flights4.8%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
16 of 84 late departures made up the time and arrived on time, 19% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for DL 1076
The latest arrival of the period was on 9 March 2026, 11 hours 24 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across March, June and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 March 2026 | 11 hours 24 minutes | Carrier |
| 5 March 2026 | 9 hours 55 minutes | Extreme weather |
| 11 June 2026 | 4 hours 45 minutes | Late-arriving aircraft |
| 10 June 2026 | 2 hours 40 minutes | National Airspace System |
| 29 January 2026 | 2 hours 24 minutes | Carrier |
Delay causes
Why DL 1076 runs late
Carrier accounts for 45% of the 5,562 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 24%Late-arriving aircraft
- 16%National Airspace System
- 15%Extreme weather
- 1%Security
Extreme weather accounts for 15% 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 2.4 times the usual weather exposure. The split is drawn from 5,562 delay minutes reported on DL 1076.
Cancellations sit at 2.47% against a national 1.89%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
7.6% 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 a little over an hour, which a normal layover absorbs.
The 591 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 365 flights under DL 1076 in the data flew ATL to MDW. 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. 365 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 1076
For a booking, read DL 1076 as 77.1% on time with 2.47% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to MDW, every carrier and departure
- MDW to ATL, the return direction
- Delta Air Lines 1063 on the same route85.6%
- Frontier Airlines 2779 on the same route64.5%
- Frontier Airlines 2291 on the same route64.5%
- Delta Air Lines 2417 on the same route87.3%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Chicago Midway International (MDW) 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.