PlainFlights

Route · ATL → MDW · 2020–2025 BTS data

Atlanta to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ATL to MDW (Atlanta to Chicago) ranks #350 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

81.1%
On-time
+2.1 pts
vs US avg
66 min
Delay when late
19,666
Flights
#350 of 4927
Corpus placement

Cancelled

1.2%

Best Month

Feb 2024 91%

Worst Month

Jul 2025 67%

Distance

591 mi

Carriers

14

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 290 78 9 1 DL,WN,F9
Nov 2025 288 50 14 4 DL,F9,WN
Oct 2025 304 62 0 0 DL,WN,F9
Sep 2025 292 28 0 0 WN,DL,F9
Aug 2025 305 74 3 1 WN,F9,DL
Jul 2025 324 108 4 4 WN,DL,F9
Jun 2025 316 96 8 1 DL,WN,F9
May 2025 321 79 0 1 DL,WN,F9
Apr 2025 301 61 1 2 DL,F9,WN
Mar 2025 303 50 2 1 WN,DL,F9
Feb 2025 246 43 1 0 WN,DL,F9
Jan 2025 279 54 13 1 WN,DL,F9
Dec 2024 304 60 1 0 DL,F9,WN
Nov 2024 330 57 1 1 WN,DL,F9
Oct 2024 342 43 0 0 DL,F9,WN
Sep 2024 330 48 0 0 WN,DL,F9
Aug 2024 348 51 0 1 DL,F9,WN
Jul 2024 339 96 11 2 DL,F9,WN
Jun 2024 331 67 0 2 DL,F9,WN
May 2024 339 105 2 2 DL,F9,WN
Apr 2024 333 68 2 0 DL,F9,WN
Mar 2024 308 50 2 0 DL,F9,WN
Feb 2024 243 22 0 1 DL,F9,WN
Jan 2024 267 56 15 4 DL,F9,WN

ATL–MDW seasonal on-time pattern

Best: February (87.1%) · weakest: July (69.9%)

65%70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 80.6%

Strongest calendar month

February

87.1% on-time · ~236 flights/mo

Busiest calendar month

October

~302 flights/mo avg

Weakest calendar month

July

69.9% on-time · ~278 flights/mo

Cancellation Rate

1.2%

89 of 7,383 flights

Diversion Rate

0.4%

29 of 7,383 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

ATL - Atlanta

Full on-time, delay-cause, and seasonal performance for Atlanta, GA.

ATL on-time profile

MDW - Chicago

Full on-time, delay-cause, and seasonal performance for Chicago, IL.

MDW on-time profile

Compare the two airports

See ATL and MDW side by side on delays, cancellations, and reliability.

Compare ATL vs MDW

Origin-hub reliability standing

Mid-pack among ATL departures

From ATL, this corridor sits with 75 other 75–85% on-time routes out of 144 tracked departures, not the hub's reliability leaders (67 at ≥85%) and not the softest ( 2 below 75%). Destination: Chicago · fleet on-time rank #2675 of 4927.

What the Data Says About ATL to MDW

19,666 tracked flights put the ATL to MDW pairing (Atlanta to Chicago) at a 81.1% on-time rate, squarely in line with the wider network. Delays that do occur run 66.3 minutes on average. Across the 591-mile route and its 14 carriers, the trailing 24 months show 1.2% cancelled and 0.4% diverted (7,383 flights sampled).

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 91% on-time, while Jul 2025 came in at just 67% - a 24-point swing worth factoring into travel timing.

On the multi-year calendar, ATL–MDW peaks in February at 87.1% on-time while October carries the heaviest traffic (~302 flights per month) ; the softest month is July at 69.9%, a 17.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ATL to MDW rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ATL to MDW ranks #350 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from ATL to MDW? ▼
Flights from Atlanta to Chicago have a 81.1% on-time rate based on 19,666 flights. The average delay is 66.3 minutes. The best recent month was Feb 2024 with 91% on-time.
What is the cancellation rate for ATL to MDW? ▼
Over the last 24 months, 1.2% of flights on this route were cancelled (89 of 7,383 flights) and 0.4% were diverted.
How far is the flight from ATL to MDW? ▼
The flight distance from Atlanta (ATL) to Chicago (MDW) is approximately 591 miles. This route is served by 14 carriers.
When is the best time to fly from ATL to MDW? ▼
The best recent month for on-time performance was Feb 2024 (91% on-time). The worst was Jul 2025 (67% on-time). Consider booking during months with historically better performance.

Airports on this route

ATL Airport

Atlanta
MDW Airport

Chicago
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using ATL–MDW data

ATL–MDW is mid-pack at 81.1% on-time; month and carrier mix move more than the corridor headline.

  • Compare ATL and MDW airport profiles: delay causes and top routes differ even on the same corridor. ATL airport
  • If your dates flex, February (87.1% on-time) beats July (69.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 81.1% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.