Flight number record

DL 1076

Delta Air Lines · Atlanta to Chicago

Route: ATL → MDW
Departs: 21:15
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1076, check with Delta Air Lines.

DL 1076 sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 365 flights, with a median arrival 2 minutes early.

On time

75.8%

Arrivals under 15 minutes late, of 355 completed flights

Avg delay

80 min

Across delayed arrivals only, not all flights

Cancelled

2.47%

National rate is 1.81%

1 hour+ late

8.7%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 38 of 365 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:1538 flights10.4%

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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1076 runs 5 points better at 75.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 1076 next to ATL to MDW

Every carrier on ATL to MDW combined arrived on time 76.3% of the time across 3,527 flights, so DL 1076 is about level with it. Delta flew 1,383 flights on the same city pair under all its flight numbers, including this one, and those ran 81.5% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 6 points.

DL 1076 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1076	365	75.8%	80 min	2.47%	B
All Delta Air Lines on ATL–MDW	1,383	81.5%	58 min	2.24%	B
All carriers on ATL–MDW	3,527	76.3%	66 min	1.84%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1076 quarter by quarter

DL 1076 did not run the same all year. Its best quarter was Oct–Dec 2025 at 84.1% on time and its weakest Jul–Sep 2025 at 66.3%, a swing of 18 points on roughly 91 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 202592 flights66.3%
Oct–Dec 202592 flights84.1%
Jan–Mar 202690 flights76.7%
Apr–Jun 202691 flights76.4%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1076 did best on Wednesday at 86.5% on time and worst on Thursday at 62.7%. Each day rests on about 52 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1076 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 6,902 reported delay minutes.

Carrier
35%
Late-arriving aircraft
29%
Extreme weather
22%
National Airspace System
13%
Security
0%

Extreme weather accounts for 22% 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 3.6 times the usual weather exposure. The split is drawn from 6,902 delay minutes reported on DL 1076.

Cancellations sit at 2.47% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

8.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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 75.8% on time with 2.47% cancelled over 365 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