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437 km · Domestic

Chicago Midway (MDW) – Louisville Muhammad Ali (SDF)

In July 2026, 182 flights operated between Chicago Midway and Louisville Muhammad Ali (both directions), and 82.4% 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
January125119▼ 4.8%
February112111▼ 0.9%
March159166▲ 4.4%
April170171▲ 0.6%
May176171▼ 2.8%
June204174▼ 14.7%
July200182▼ 9.0%
August178––
September172––
October176–in progress
November147––
December156––
Year to date (Jan–Jul)1,1461,094▼ 4.5%

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
January84.8%88.2%▲ 4.0%
February82.1%88.3%▲ 7.6%
March79.9%72.9%▼ 8.8%
April79.4%83.0%▲ 4.5%
May81.8%80.7%▼ 1.3%
June76.5%76.4%▼ 0.1%
July67.5%82.4%▲ 22.1%
August82.0%––
September85.5%––
October81.3%–in progress
November85.7%––
December76.9%––
Year-to-date average (Jan–Jul)78.9%81.7%▲ 3.6%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January47▲ 75.0%
February01–
March14▲ 300.0%
April12▲ 100.0%
May10▼ 100.0%
June06–
July82▼ 75.0%
August1––
September0––
October0–in progress
November9––
December0––
Year to date (Jan–Jul)1522▲ 46.7%

By direction

MDW → SDF

Scheduled flights
1,776
Flights operated
1,755
Cancelled
21 · 1.2%
On-time departures
78.5%

SDF → MDW

Scheduled flights
1,774
Flights operated
1,748
Cancelled
26 · 1.5%
On-time departures
83.5%

MDW → SDF and SDF → MDW counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 3,550 100.0% 81.0% 47

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 delay07:00–08:000.9min · 272 recorded · 269 measured
Gap to highest-delay hour19.4min07:00 ↔ 20:00
Recorded flights3,550MDW–SDF

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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 93.5% · 358 recorded · 352 measured · Source: the US BTS 07:00 · 94.8% · 272 recorded · 269 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 197 recorded · 196 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 196 recorded · 191 measured · Source: the US BTS 10:00 · 92.1% · 264 recorded · 264 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 58 recorded · 57 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 128 recorded · 126 measured · Source: the US BTS 13:00 · 83.8% · 266 recorded · 265 measured · Source: the US BTS 14:00 · 77.1% · 218 recorded · 218 measured · Source: the US BTS 15:00 · 75.0% · 218 recorded · 216 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 151 recorded · 150 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 44 recorded · 43 measured · Source: the US BTS 18:00 · 83.3% · 235 recorded · 233 measured · Source: the US BTS 19:00 · 71.7% · 409 recorded · 399 measured · Source: the US BTS 20:00 · 65.9% · 379 recorded · 369 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 115 recorded · 113 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 42 recorded · 42 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 1.7 min · 358 recorded · 352 measured · Source: the US BTS 07:00 · 0.9 min · 272 recorded · 269 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 197 recorded · 196 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 196 recorded · 191 measured · Source: the US BTS 10:00 · 1.3 min · 264 recorded · 264 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 58 recorded · 57 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 128 recorded · 126 measured · Source: the US BTS 13:00 · 8.4 min · 266 recorded · 265 measured · Source: the US BTS 14:00 · 9.5 min · 218 recorded · 218 measured · Source: the US BTS 15:00 · 16.1 min · 218 recorded · 216 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 151 recorded · 150 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 44 recorded · 43 measured · Source: the US BTS 18:00 · 6.9 min · 235 recorded · 233 measured · Source: the US BTS 19:00 · 14.3 min · 409 recorded · 399 measured · Source: the US BTS 20:00 · 20.4 min · 379 recorded · 369 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 115 recorded · 113 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 42 recorded · 42 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 358 · 358 recorded · 352 measured · Source: the US BTS 07:00 · 272 · 272 recorded · 269 measured · Source: the US BTS 08:00 · 197 · 197 recorded · 196 measured · Source: the US BTS 09:00 · 196 · 196 recorded · 191 measured · Source: the US BTS 10:00 · 264 · 264 recorded · 264 measured · Source: the US BTS 11:00 · 58 · 58 recorded · 57 measured · Source: the US BTS 12:00 · 128 · 128 recorded · 126 measured · Source: the US BTS 13:00 · 266 · 266 recorded · 265 measured · Source: the US BTS 14:00 · 218 · 218 recorded · 218 measured · Source: the US BTS 15:00 · 218 · 218 recorded · 216 measured · Source: the US BTS 16:00 · 151 · 151 recorded · 150 measured · Source: the US BTS 17:00 · 44 · 44 recorded · 43 measured · Source: the US BTS 18:00 · 235 · 235 recorded · 233 measured · Source: the US BTS 19:00 · 409 · 409 recorded · 399 measured · Source: the US BTS 20:00 · 379 · 379 recorded · 369 measured · Source: the US BTS 21:00 · 115 · 115 recorded · 113 measured · Source: the US BTS 22:00 · 42 · 42 recorded · 42 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 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———
05:00No observations———
06:0093.5%1.7 min352358
07:0094.8%0.9 min269272
08:00Fewer than 200 measured departures—196197
09:00Fewer than 200 measured departures—191196
10:0092.1%1.3 min264264
11:00Fewer than 200 measured departures—5758
12:00Fewer than 200 measured departures—126128
13:0083.8%8.4 min265266
14:0077.1%9.5 min218218
15:0075.0%16.1 min216218
16:00Fewer than 200 measured departures—150151
17:00Fewer than 200 measured departures—4344
18:0083.3%6.9 min233235
19:0071.7%14.3 min399409
20:0065.9%20.4 min369379
21:00Fewer than 200 measured departures—113115
22:00Fewer than 200 measured departures—4242
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.2% · 537 recorded · 529 measured · Source: the US BTS Tuesday · 85.9% · 520 recorded · 517 measured · Source: the US BTS Wednesday · 84.5% · 523 recorded · 517 measured · Source: the US BTS Thursday · 78.6% · 538 recorded · 532 measured · Source: the US BTS Friday · 76.9% · 534 recorded · 528 measured · Source: the US BTS Saturday · 84.6% · 387 recorded · 377 measured · Source: the US BTS Sunday · 78.3% · 511 recorded · 503 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 · 10.7 min · 537 recorded · 529 measured · Source: the US BTS Tuesday · 7.6 min · 520 recorded · 517 measured · Source: the US BTS Wednesday · 6.2 min · 523 recorded · 517 measured · Source: the US BTS Thursday · 12.8 min · 538 recorded · 532 measured · Source: the US BTS Friday · 10.7 min · 534 recorded · 528 measured · Source: the US BTS Saturday · 6.6 min · 387 recorded · 377 measured · Source: the US BTS Sunday · 10.1 min · 511 recorded · 503 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 · 537 · 537 recorded · 529 measured · Source: the US BTS Tuesday · 520 · 520 recorded · 517 measured · Source: the US BTS Wednesday · 523 · 523 recorded · 517 measured · Source: the US BTS Thursday · 538 · 538 recorded · 532 measured · Source: the US BTS Friday · 534 · 534 recorded · 528 measured · Source: the US BTS Saturday · 387 · 387 recorded · 377 measured · Source: the US BTS Sunday · 511 · 511 recorded · 503 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.2%10.7 min529537
Tuesday85.9%7.6 min517520
Wednesday84.5%6.2 min517523
Thursday78.6%12.8 min532538
Friday76.9%10.7 min528534
Saturday84.6%6.6 min377387
Sunday78.3%10.1 min503511

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 · 86.5% · 255 recorded · 244 measured · Source: the US BTS Feb · 85.2% · 224 recorded · 223 measured · Source: the US BTS Mar · 76.3% · 330 recorded · 325 measured · Source: the US BTS Apr · 81.2% · 344 recorded · 341 measured · Source: the US BTS May · 81.3% · 348 recorded · 347 measured · Source: the US BTS Jun · 76.5% · 384 recorded · 378 measured · Source: the US BTS Jul · 74.6% · 392 recorded · 382 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 179 recorded · 178 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 172 recorded · 172 measured · Source: the US BTS Oct · 85.1% · 288 recorded · 288 measured · Source: the US BTS Nov · 86.7% · 318 recorded · 309 measured · Source: the US BTS Dec · 78.8% · 316 recorded · 316 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 5.1 min · 255 recorded · 244 measured · Source: the US BTS Feb · 6.4 min · 224 recorded · 223 measured · Source: the US BTS Mar · 14.9 min · 330 recorded · 325 measured · Source: the US BTS Apr · 8.1 min · 344 recorded · 341 measured · Source: the US BTS May · 8.0 min · 348 recorded · 347 measured · Source: the US BTS Jun · 13.0 min · 384 recorded · 378 measured · Source: the US BTS Jul · 18.4 min · 392 recorded · 382 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 179 recorded · 178 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 172 recorded · 172 measured · Source: the US BTS Oct · 6.0 min · 288 recorded · 288 measured · Source: the US BTS Nov · 4.4 min · 318 recorded · 309 measured · Source: the US BTS Dec · 8.0 min · 316 recorded · 316 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
Jan · 255 · 255 recorded · 244 measured · Source: the US BTS Feb · 224 · 224 recorded · 223 measured · Source: the US BTS Mar · 330 · 330 recorded · 325 measured · Source: the US BTS Apr · 344 · 344 recorded · 341 measured · Source: the US BTS May · 348 · 348 recorded · 347 measured · Source: the US BTS Jun · 384 · 384 recorded · 378 measured · Source: the US BTS Jul · 392 · 392 recorded · 382 measured · Source: the US BTS Aug · 179 · 179 recorded · 178 measured · Source: the US BTS Sep · 172 · 172 recorded · 172 measured · Source: the US BTS Oct · 288 · 288 recorded · 288 measured · Source: the US BTS Nov · 318 · 318 recorded · 309 measured · Source: the US BTS Dec · 316 · 316 recorded · 316 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan86.5%5.1 min244255
Feb85.2%6.4 min223224
Mar76.3%14.9 min325330
Apr81.2%8.1 min341344
May81.3%8.0 min347348
Jun76.5%13.0 min378384
Jul74.6%18.4 min382392
AugFewer than 200 measured departures—178179
SepFewer than 200 measured departures—172172
Oct85.1%6.0 min288288
Nov86.7%4.4 min309318
Dec78.8%8.0 min316316

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 79.9% 2,837
  • Delayed >15 min 18.8% 666
  • Cancelled 1.3% 47
  • 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

42
42 of 42
Flight numbersBy direction DeparturesOn time
WN1119 SDF → MDW 74 93.2%
WN4356 MDW → SDF 67 72.7%
WN3913 SDF → MDW 61 76.7%
WN1286 MDW → SDF 59 79.7%
WN1776 MDW → SDF 59 62.1%
WN1585 MDW → SDF 58 65.5%
WN3484 SDF → MDW 58 98.3%
WN3671 SDF → MDW 58 98.3%
WN4971 MDW → SDF 58 76.4%
WN1267 MDW → SDF 57 96.5%
WN1935 SDF → MDW 57 83.9%
WN2316 MDW → SDF 57 79.0%
WN1385 SDF → MDW 52 84.6%
WN1096 SDF → MDW 50 87.5%
WN1763 SDF → MDW 50 94.0%
WN3610 SDF → MDW 50 68.8%
WN833 MDW → SDF 50 98.0%
WN300 SDF → MDW 49 77.6%
WN3376 MDW → SDF 49 75.5%
WN2497 SDF → MDW 46 86.4%
WN1122 MDW → SDF 42 64.3%
WN1683 SDF → MDW 42 69.1%
WN2131 SDF → MDW 42 73.8%
WN3199 MDW → SDF 42 85.7%
WN4597 MDW → SDF 42 62.5%
WN1910 SDF → MDW 41 84.6%
WN1407 SDF → MDW 39 89.7%
WN1317 MDW → SDF 37 91.9%
WN3460 MDW → SDF 36 80.0%
WN3942 SDF → MDW 36 100.0%
WN5920 SDF → MDW 35 60.6%
WN3609 SDF → MDW 34 97.0%
WN1324 MDW → SDF 33 81.8%
WN1678 MDW → SDF 33 56.3%
WN2035 SDF → MDW 33 66.7%
WN2755 MDW → SDF 33 87.9%
WN3146 SDF → MDW 33 84.9%
WN1179 SDF → MDW 32 68.8%
WN1475 MDW → SDF 31 80.7%
WN130 MDW → SDF 30 86.7%
WN3870 MDW → SDF 30 76.7%
WN4931 MDW → SDF 30 92.9%

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 182 −9.0% 2 82.4%
June 2026 174 −14.7% 6 76.4%
May 2026 171 −2.8% 0 80.7%
April 2026 171 +0.6% 2 83.0%
March 2026 166 +4.4% 4 72.9%
February 2026 111 −0.9% 1 88.3%
January 2026 119 −4.8% 7 88.2%
December 2025 156 −2.5% 0 76.9%
November 2025 147 −9.3% 9 85.7%
October 2025 176 +57.1% 0 81.3%
September 2025 172 0 85.5%
August 2025 178 1 82.0%
July 2025 200 8 67.5%
June 2025 204 0 76.5%
May 2025 176 1 81.8%
April 2025 170 1 79.4%
March 2025 159 1 79.9%
February 2025 112 0 82.1%
January 2025 125 4 84.8%
December 2024 160 0 80.6%
November 2024 162 0 87.7%
October 2024 112 0 91.1%

How to read this chart

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