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952 km · Domestic

Hartsfield Jackson Atlanta (ATL) – Chicago Midway (MDW)

In July 2026, 623 flights operated between Hartsfield Jackson Atlanta and Chicago Midway (both directions), and 63.2% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January529535▲ 1.1%
February478518▲ 8.4%
March603552▼ 8.5%
April607577▼ 4.9%
May651593▼ 8.9%
June617604▼ 2.1%
July639623▼ 2.5%
August603––
September584––
October608–in progress
November550––
December562––
Year to date (Jan–Jul)4,1244,002▼ 3.0%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January78.6%83.0%▲ 5.6%
February81.2%78.6%▼ 3.2%
March82.9%73.7%▼ 11.1%
April77.4%83.5%▲ 7.9%
May78.3%69.3%▼ 11.5%
June68.9%67.7%▼ 1.7%
July67.3%63.2%▼ 6.1%
August77.1%––
September87.3%––
October80.3%–in progress
November82.4%––
December72.2%––
Year-to-date average (Jan–Jul)76.4%74.1%▼ 2.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January2922▼ 24.1%
February23▲ 50.0%
March526▲ 420.0%
April45▲ 25.0%
May02–
June1712▼ 29.4%
July923▲ 155.6%
August7––
September0––
October0–in progress
November26––
December18––
Year to date (Jan–Jul)6693▲ 40.9%

Airlines on this route

  1. Southwest Airlines 44.1%
  2. Delta Air Lines 39.9%
  3. Frontier Airlines 16.0%

Oct 1, 2024 – Jul 31, 2026

By direction

ATL → MDW

Scheduled flights
6,470
Flights operated
6,368
Cancelled
102 · 1.6%
On-time departures
74.8%

MDW → ATL

Scheduled flights
6,480
Flights operated
6,369
Cancelled
111 · 1.7%
On-time departures
79.5%

ATL → MDW and MDW → ATL counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 5,712 44.1% 73.4% 65
Delta Air Lines DL 5,168 39.9% 83.3% 100
Frontier Airlines F9 2,070 16.0% 72.2% 48

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay06:00–07:002.1min · 1,468 recorded · 1,437 measured
Gap to highest-delay hour35.3min06:00 ↔ 22:00
Recorded flights12,950ATL–MDW

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 06:00 · 94.0% · 1,468 recorded · 1,437 measured · Source: the US BTS 07:00 · 88.8% · 521 recorded · 516 measured · Source: the US BTS 08:00 · 86.9% · 1,010 recorded · 993 measured · Source: the US BTS 09:00 · 85.0% · 684 recorded · 675 measured · Source: the US BTS 10:00 · 82.6% · 951 recorded · 932 measured · Source: the US BTS 11:00 · 80.6% · 1,011 recorded · 994 measured · Source: the US BTS 12:00 · 77.9% · 1,095 recorded · 1,074 measured · Source: the US BTS 13:00 · 78.8% · 315 recorded · 311 measured · Source: the US BTS 14:00 · 68.6% · 686 recorded · 675 measured · Source: the US BTS 15:00 · 79.1% · 811 recorded · 800 measured · Source: the US BTS 16:00 · 73.1% · 738 recorded · 725 measured · Source: the US BTS 17:00 · 68.1% · 884 recorded · 871 measured · Source: the US BTS 18:00 · 64.3% · 871 recorded · 858 measured · Source: the US BTS 19:00 · 54.0% · 403 recorded · 400 measured · Source: the US BTS 20:00 · 67.2% · 432 recorded · 424 measured · Source: the US BTS 21:00 · 63.5% · 755 recorded · 743 measured · Source: the US BTS 22:00 · 56.6% · 292 recorded · 286 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 06:00 · 2.1 min · 1,468 recorded · 1,437 measured · Source: the US BTS 07:00 · 5.0 min · 521 recorded · 516 measured · Source: the US BTS 08:00 · 6.0 min · 1,010 recorded · 993 measured · Source: the US BTS 09:00 · 4.5 min · 684 recorded · 675 measured · Source: the US BTS 10:00 · 7.1 min · 951 recorded · 932 measured · Source: the US BTS 11:00 · 7.8 min · 1,011 recorded · 994 measured · Source: the US BTS 12:00 · 11.3 min · 1,095 recorded · 1,074 measured · Source: the US BTS 13:00 · 12.0 min · 315 recorded · 311 measured · Source: the US BTS 14:00 · 17.8 min · 686 recorded · 675 measured · Source: the US BTS 15:00 · 9.8 min · 811 recorded · 800 measured · Source: the US BTS 16:00 · 16.2 min · 738 recorded · 725 measured · Source: the US BTS 17:00 · 21.0 min · 884 recorded · 871 measured · Source: the US BTS 18:00 · 23.0 min · 871 recorded · 858 measured · Source: the US BTS 19:00 · 33.3 min · 403 recorded · 400 measured · Source: the US BTS 20:00 · 22.0 min · 432 recorded · 424 measured · Source: the US BTS 21:00 · 28.1 min · 755 recorded · 743 measured · Source: the US BTS 22:00 · 37.4 min · 292 recorded · 286 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 19 · 19 recorded · 19 measured · Source: the US BTS 06:00 · 1,468 · 1,468 recorded · 1,437 measured · Source: the US BTS 07:00 · 521 · 521 recorded · 516 measured · Source: the US BTS 08:00 · 1,010 · 1,010 recorded · 993 measured · Source: the US BTS 09:00 · 684 · 684 recorded · 675 measured · Source: the US BTS 10:00 · 951 · 951 recorded · 932 measured · Source: the US BTS 11:00 · 1,011 · 1,011 recorded · 994 measured · Source: the US BTS 12:00 · 1,095 · 1,095 recorded · 1,074 measured · Source: the US BTS 13:00 · 315 · 315 recorded · 311 measured · Source: the US BTS 14:00 · 686 · 686 recorded · 675 measured · Source: the US BTS 15:00 · 811 · 811 recorded · 800 measured · Source: the US BTS 16:00 · 738 · 738 recorded · 725 measured · Source: the US BTS 17:00 · 884 · 884 recorded · 871 measured · Source: the US BTS 18:00 · 871 · 871 recorded · 858 measured · Source: the US BTS 19:00 · 403 · 403 recorded · 400 measured · Source: the US BTS 20:00 · 432 · 432 recorded · 424 measured · Source: the US BTS 21:00 · 755 · 755 recorded · 743 measured · Source: the US BTS 22:00 · 292 · 292 recorded · 286 measured · Source: the US BTS 23:00 · 4 · 4 recorded · 4 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—1919
06:0094.0%2.1 min1,4371,468
07:0088.8%5.0 min516521
08:0086.9%6.0 min9931,010
09:0085.0%4.5 min675684
10:0082.6%7.1 min932951
11:0080.6%7.8 min9941,011
12:0077.9%11.3 min1,0741,095
13:0078.8%12.0 min311315
14:0068.6%17.8 min675686
15:0079.1%9.8 min800811
16:0073.1%16.2 min725738
17:0068.1%21.0 min871884
18:0064.3%23.0 min858871
19:0054.0%33.3 min400403
20:0067.2%22.0 min424432
21:0063.5%28.1 min743755
22:0056.6%37.4 min286292
23:00Fewer than 200 measured departures—44

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 74.2% · 1,968 recorded · 1,934 measured · Source: the US BTS Tuesday · 81.8% · 1,812 recorded · 1,799 measured · Source: the US BTS Wednesday · 82.4% · 1,799 recorded · 1,782 measured · Source: the US BTS Thursday · 76.8% · 1,946 recorded · 1,934 measured · Source: the US BTS Friday · 75.8% · 1,973 recorded · 1,929 measured · Source: the US BTS Saturday · 78.1% · 1,484 recorded · 1,444 measured · Source: the US BTS Sunday · 71.9% · 1,968 recorded · 1,915 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 17.1 min · 1,968 recorded · 1,934 measured · Source: the US BTS Tuesday · 8.5 min · 1,812 recorded · 1,799 measured · Source: the US BTS Wednesday · 7.5 min · 1,799 recorded · 1,782 measured · Source: the US BTS Thursday · 14.1 min · 1,946 recorded · 1,934 measured · Source: the US BTS Friday · 14.6 min · 1,973 recorded · 1,929 measured · Source: the US BTS Saturday · 12.1 min · 1,484 recorded · 1,444 measured · Source: the US BTS Sunday · 17.7 min · 1,968 recorded · 1,915 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 1,968 · 1,968 recorded · 1,934 measured · Source: the US BTS Tuesday · 1,812 · 1,812 recorded · 1,799 measured · Source: the US BTS Wednesday · 1,799 · 1,799 recorded · 1,782 measured · Source: the US BTS Thursday · 1,946 · 1,946 recorded · 1,934 measured · Source: the US BTS Friday · 1,973 · 1,973 recorded · 1,929 measured · Source: the US BTS Saturday · 1,484 · 1,484 recorded · 1,444 measured · Source: the US BTS Sunday · 1,968 · 1,968 recorded · 1,915 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday74.2%17.1 min1,9341,968
Tuesday81.8%8.5 min1,7991,812
Wednesday82.4%7.5 min1,7821,799
Thursday76.8%14.1 min1,9341,946
Friday75.8%14.6 min1,9291,973
Saturday78.1%12.1 min1,4441,484
Sunday71.9%17.7 min1,9151,968

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 80.8% · 1,115 recorded · 1,064 measured · Source: the US BTS Feb · 79.8% · 1,001 recorded · 996 measured · Source: the US BTS Mar · 78.5% · 1,186 recorded · 1,155 measured · Source: the US BTS Apr · 80.4% · 1,193 recorded · 1,184 measured · Source: the US BTS May · 74.0% · 1,246 recorded · 1,244 measured · Source: the US BTS Jun · 68.3% · 1,250 recorded · 1,221 measured · Source: the US BTS Jul · 65.3% · 1,294 recorded · 1,262 measured · Source: the US BTS Aug · 77.1% · 610 recorded · 603 measured · Source: the US BTS Sep · 87.3% · 584 recorded · 584 measured · Source: the US BTS Oct · 83.0% · 1,046 recorded · 1,045 measured · Source: the US BTS Nov · 82.7% · 1,237 recorded · 1,210 measured · Source: the US BTS Dec · 76.2% · 1,188 recorded · 1,169 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 9.4 min · 1,115 recorded · 1,064 measured · Source: the US BTS Feb · 11.3 min · 1,001 recorded · 996 measured · Source: the US BTS Mar · 15.1 min · 1,186 recorded · 1,155 measured · Source: the US BTS Apr · 8.1 min · 1,193 recorded · 1,184 measured · Source: the US BTS May · 16.7 min · 1,246 recorded · 1,244 measured · Source: the US BTS Jun · 19.3 min · 1,250 recorded · 1,221 measured · Source: the US BTS Jul · 25.9 min · 1,294 recorded · 1,262 measured · Source: the US BTS Aug · 11.7 min · 610 recorded · 603 measured · Source: the US BTS Sep · 3.4 min · 584 recorded · 584 measured · Source: the US BTS Oct · 7.0 min · 1,046 recorded · 1,045 measured · Source: the US BTS Nov · 10.3 min · 1,237 recorded · 1,210 measured · Source: the US BTS Dec · 12.4 min · 1,188 recorded · 1,169 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 1,115 · 1,115 recorded · 1,064 measured · Source: the US BTS Feb · 1,001 · 1,001 recorded · 996 measured · Source: the US BTS Mar · 1,186 · 1,186 recorded · 1,155 measured · Source: the US BTS Apr · 1,193 · 1,193 recorded · 1,184 measured · Source: the US BTS May · 1,246 · 1,246 recorded · 1,244 measured · Source: the US BTS Jun · 1,250 · 1,250 recorded · 1,221 measured · Source: the US BTS Jul · 1,294 · 1,294 recorded · 1,262 measured · Source: the US BTS Aug · 610 · 610 recorded · 603 measured · Source: the US BTS Sep · 584 · 584 recorded · 584 measured · Source: the US BTS Oct · 1,046 · 1,046 recorded · 1,045 measured · Source: the US BTS Nov · 1,237 · 1,237 recorded · 1,210 measured · Source: the US BTS Dec · 1,188 · 1,188 recorded · 1,169 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan80.8%9.4 min1,0641,115
Feb79.8%11.3 min9961,001
Mar78.5%15.1 min1,1551,186
Apr80.4%8.1 min1,1841,193
May74.0%16.7 min1,2441,246
Jun68.3%19.3 min1,2211,250
Jul65.3%25.9 min1,2621,294
Aug77.1%11.7 min603610
Sep87.3%3.4 min584584
Oct83.0%7.0 min1,0451,046
Nov82.7%10.3 min1,2101,237
Dec76.2%12.4 min1,1691,188

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 75.9% 9,827
  • Delayed >15 min 22.5% 2,910
  • Cancelled 1.6% 213
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

100
100 of 100
Flight numbersBy direction DeparturesOn time
DL1063 ATL → MDW 658 88.5%
DL1063 MDW → ATL 658 86.1%
DL1076 ATL → MDW 658 76.7%
DL2417 ATL → MDW 526 82.6%
DL2417 MDW → ATL 525 82.7%
F992292 MDW → ATL 514 87.2%
F992779 ATL → MDW 483 55.8%
DL1285 MDW → ATL 463 93.6%
F992291 ATL → MDW 377 63.5%
F992144 MDW → ATL 316 77.4%
DL1739 ATL → MDW 315 79.4%
DL2060 MDW → ATL 282 78.2%
DL2060 ATL → MDW 281 84.2%
DL1739 MDW → ATL 224 74.2%
F992780 MDW → ATL 197 83.5%
DL2400 MDW → ATL 195 92.6%
F992143 ATL → MDW 166 71.4%
DL2307 MDW → ATL 121 80.2%
DL1728 MDW → ATL 97 67.4%
DL1728 ATL → MDW 97 83.2%
WN4703 ATL → MDW 95 72.3%
WN452 MDW → ATL 94 96.8%
WN5140 MDW → ATL 85 72.3%
WN1048 ATL → MDW 80 91.0%
WN429 ATL → MDW 76 80.0%
WN4994 MDW → ATL 68 85.1%
WN400 MDW → ATL 67 76.6%
WN1925 ATL → MDW 61 81.4%
WN1870 MDW → ATL 60 68.3%
WN425 ATL → MDW 59 96.6%
WN1191 ATL → MDW 58 81.0%
WN1403 MDW → ATL 58 80.7%
WN1689 ATL → MDW 58 73.7%
WN2641 MDW → ATL 58 91.2%
WN2781 ATL → MDW 58 74.1%
WN2269 MDW → ATL 57 91.2%
WN3217 MDW → ATL 57 59.7%
WN3360 ATL → MDW 54 79.6%
WN3368 ATL → MDW 52 78.9%
WN2211 ATL → MDW 51 80.0%
WN233 ATL → MDW 51 29.4%
WN3777 MDW → ATL 51 50.0%
WN3978 ATL → MDW 51 37.3%
WN1270 ATL → MDW 50 69.4%
WN232 ATL → MDW 50 33.3%
WN258 ATL → MDW 50 54.0%
WN2672 ATL → MDW 50 66.0%
WN3190 MDW → ATL 50 64.0%
WN3475 MDW → ATL 50 88.0%
WN3645 MDW → ATL 50 77.6%
WN4708 MDW → ATL 50 82.0%
WN1557 ATL → MDW 49 57.1%
WN2343 MDW → ATL 49 79.6%
WN3223 MDW → ATL 49 49.0%
WN4397 ATL → MDW 48 93.6%
WN2707 ATL → MDW 47 80.0%
WN2747 ATL → MDW 47 97.8%
WN1344 ATL → MDW 46 72.7%
WN1939 MDW → ATL 46 76.1%
WN1941 ATL → MDW 46 75.0%
WN2775 MDW → ATL 46 86.4%
WN3263 MDW → ATL 46 56.5%
WN423 ATL → MDW 46 86.7%
WN1598 MDW → ATL 43 74.4%
WN884 MDW → ATL 43 90.7%
WN1132 ATL → MDW 42 66.7%
WN1431 MDW → ATL 42 85.4%
WN1783 ATL → MDW 42 87.8%
WN2121 MDW → ATL 42 92.9%
WN3054 MDW → ATL 42 83.3%
WN3643 MDW → ATL 42 81.0%
WN4154 MDW → ATL 42 83.3%
WN981 ATL → MDW 42 97.6%
WN4592 MDW → ATL 41 30.0%
WN3362 MDW → ATL 40 60.0%
WN1397 MDW → ATL 39 89.7%
WN1274 ATL → MDW 36 41.7%
WN444 MDW → ATL 36 75.0%
WN484 ATL → MDW 35 58.8%
WN1918 MDW → ATL 34 60.6%
WN3255 ATL → MDW 34 94.1%
WN4140 MDW → ATL 34 6.1%
WN1293 MDW → ATL 33 96.9%
WN1440 MDW → ATL 33 53.1%
WN1845 ATL → MDW 33 78.8%
WN2139 MDW → ATL 33 57.6%
WN3034 ATL → MDW 33 71.9%
WN322 ATL → MDW 33 81.3%
WN331 ATL → MDW 33 53.1%
WN3326 MDW → ATL 33 40.6%
WN3582 ATL → MDW 33 75.8%
WN979 MDW → ATL 33 93.6%
WN163 MDW → ATL 32 65.6%
WN2092 MDW → ATL 31 58.1%
WN435 MDW → ATL 31 96.8%
WN444 ATL → MDW 31 90.3%
WN759 ATL → MDW 31 45.2%
DL2241 ATL → MDW 30 83.3%
WN1101 MDW → ATL 30 70.0%
WN171 ATL → MDW 30 80.0%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 623 −2.5% 23 63.2%
June 2026 604 −2.1% 12 67.7%
May 2026 593 −8.9% 2 69.3%
April 2026 577 −4.9% 5 83.5%
March 2026 552 −8.5% 26 73.7%
February 2026 518 +8.4% 3 78.6%
January 2026 535 +1.1% 22 83.0%
December 2025 562 −7.4% 18 72.2%
November 2025 550 −16.7% 26 82.4%
October 2025 608 +39.1% 0 80.3%
September 2025 584 0 87.3%
August 2025 603 7 77.1%
July 2025 639 9 67.3%
June 2025 617 17 68.9%
May 2025 651 0 78.3%
April 2025 607 4 77.4%
March 2025 603 5 82.9%
February 2025 478 2 81.2%
January 2025 529 29 78.6%
December 2024 607 1 79.9%
November 2024 660 1 83.0%
October 2024 437 1 86.7%

How to read this chart

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