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1,668 km · Domestic

Chicago Midway (MDW) – San Antonio (SAT)

In July 2026, 122 flights operated between Chicago Midway and San Antonio (both directions), and 69.7% 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
January11572▼ 37.4%
February10356▼ 45.6%
March122111▼ 9.0%
April1181180.0%
May123124▲ 0.8%
June144118▼ 18.1%
July146122▼ 16.4%
August120––
September112––
October124–in progress
November110––
December120––
Year to date (Jan–Jul)871721▼ 17.2%

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
January84.3%86.1%▲ 2.1%
February91.3%75.0%▼ 17.9%
March86.1%64.0%▼ 25.7%
April82.2%81.4%▼ 1.0%
May78.0%78.2%▲ 0.3%
June77.1%59.3%▼ 23.1%
July78.1%69.7%▼ 10.8%
August77.5%––
September87.5%––
October82.3%–in progress
November80.9%––
December68.3%––
Year-to-date average (Jan–Jul)82.4%73.4%▼ 11.0%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January20▼ 100.0%
February10▼ 100.0%
March05–
April220.0%
May00–
June02–
July220.0%
August0––
September0––
October0–in progress
November4––
December0––
Year to date (Jan–Jul)711▲ 57.1%

By direction

MDW → SAT

Scheduled flights
1,257
Flights operated
1,246
Cancelled
11 · 0.9%
On-time departures
77.0%

SAT → MDW

Scheduled flights
1,257
Flights operated
1,246
Cancelled
11 · 0.9%
On-time departures
80.7%

MDW → SAT and SAT → MDW counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 2,514 100.0% 78.9% 22

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 delay06:00–07:000.2min · 298 recorded · 295 measured
Gap to highest-delay hour21.8min06:00 ↔ 15:00
Recorded flights2,514MDW–SAT

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 · 107 recorded · 106 measured · Source: the US BTS 06:00 · 93.9% · 298 recorded · 295 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 184 recorded · 180 measured · Source: the US BTS 08:00 · 91.1% · 270 recorded · 270 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 187 recorded · 185 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 170 recorded · 169 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 50 recorded · 50 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 15 recorded · 15 measured · Source: the US BTS 14:00 · 70.4% · 276 recorded · 274 measured · Source: the US BTS 15:00 · 61.3% · 240 recorded · 240 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 142 recorded · 142 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 83 recorded · 82 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 64 recorded · 63 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 70 recorded · 70 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 112 recorded · 111 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 176 recorded · 172 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 67 recorded · 65 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 · Fewer than 200 measured departures · 107 recorded · 106 measured · Source: the US BTS 06:00 · 0.2 min · 298 recorded · 295 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 184 recorded · 180 measured · Source: the US BTS 08:00 · 3.2 min · 270 recorded · 270 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 187 recorded · 185 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 170 recorded · 169 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 50 recorded · 50 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 15 recorded · 15 measured · Source: the US BTS 14:00 · 12.8 min · 276 recorded · 274 measured · Source: the US BTS 15:00 · 22.0 min · 240 recorded · 240 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 142 recorded · 142 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 83 recorded · 82 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 64 recorded · 63 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 70 recorded · 70 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 112 recorded · 111 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 176 recorded · 172 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 67 recorded · 65 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.

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 · 107 · 107 recorded · 106 measured · Source: the US BTS 06:00 · 298 · 298 recorded · 295 measured · Source: the US BTS 07:00 · 184 · 184 recorded · 180 measured · Source: the US BTS 08:00 · 270 · 270 recorded · 270 measured · Source: the US BTS 09:00 · 187 · 187 recorded · 185 measured · Source: the US BTS 10:00 · 170 · 170 recorded · 169 measured · Source: the US BTS 11:00 · 50 · 50 recorded · 50 measured · Source: the US BTS 12:00 · 3 · 3 recorded · 3 measured · Source: the US BTS 13:00 · 15 · 15 recorded · 15 measured · Source: the US BTS 14:00 · 276 · 276 recorded · 274 measured · Source: the US BTS 15:00 · 240 · 240 recorded · 240 measured · Source: the US BTS 16:00 · 142 · 142 recorded · 142 measured · Source: the US BTS 17:00 · 83 · 83 recorded · 82 measured · Source: the US BTS 18:00 · 64 · 64 recorded · 63 measured · Source: the US BTS 19:00 · 70 · 70 recorded · 70 measured · Source: the US BTS 20:00 · 112 · 112 recorded · 111 measured · Source: the US BTS 21:00 · 176 · 176 recorded · 172 measured · Source: the US BTS 22:00 · 67 · 67 recorded · 65 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———
05:00Fewer than 200 measured departures—106107
06:0093.9%0.2 min295298
07:00Fewer than 200 measured departures—180184
08:0091.1%3.2 min270270
09:00Fewer than 200 measured departures—185187
10:00Fewer than 200 measured departures—169170
11:00Fewer than 200 measured departures—5050
12:00Fewer than 200 measured departures—33
13:00Fewer than 200 measured departures—1515
14:0070.4%12.8 min274276
15:0061.3%22.0 min240240
16:00Fewer than 200 measured departures—142142
17:00Fewer than 200 measured departures—8283
18:00Fewer than 200 measured departures—6364
19:00Fewer than 200 measured departures—7070
20:00Fewer than 200 measured departures—111112
21:00Fewer than 200 measured departures—172176
22:00Fewer than 200 measured departures—6567
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 74.9% · 378 recorded · 375 measured · Source: the US BTS Tuesday · 81.2% · 358 recorded · 356 measured · Source: the US BTS Wednesday · 83.9% · 358 recorded · 354 measured · Source: the US BTS Thursday · 79.6% · 374 recorded · 372 measured · Source: the US BTS Friday · 78.3% · 376 recorded · 374 measured · Source: the US BTS Saturday · 81.3% · 312 recorded · 305 measured · Source: the US BTS Sunday · 73.3% · 358 recorded · 356 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 · 13.9 min · 378 recorded · 375 measured · Source: the US BTS Tuesday · 10.0 min · 358 recorded · 356 measured · Source: the US BTS Wednesday · 6.9 min · 358 recorded · 354 measured · Source: the US BTS Thursday · 10.6 min · 374 recorded · 372 measured · Source: the US BTS Friday · 13.0 min · 376 recorded · 374 measured · Source: the US BTS Saturday · 7.1 min · 312 recorded · 305 measured · Source: the US BTS Sunday · 12.4 min · 358 recorded · 356 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 · 378 · 378 recorded · 375 measured · Source: the US BTS Tuesday · 358 · 358 recorded · 356 measured · Source: the US BTS Wednesday · 358 · 358 recorded · 354 measured · Source: the US BTS Thursday · 374 · 374 recorded · 372 measured · Source: the US BTS Friday · 376 · 376 recorded · 374 measured · Source: the US BTS Saturday · 312 · 312 recorded · 305 measured · Source: the US BTS Sunday · 358 · 358 recorded · 356 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday74.9%13.9 min375378
Tuesday81.2%10.0 min356358
Wednesday83.9%6.9 min354358
Thursday79.6%10.6 min372374
Friday78.3%13.0 min374376
Saturday81.3%7.1 min305312
Sunday73.3%12.4 min356358

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 · Fewer than 200 measured departures · 189 recorded · 187 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 160 recorded · 159 measured · Source: the US BTS Mar · 75.5% · 238 recorded · 233 measured · Source: the US BTS Apr · 81.8% · 240 recorded · 236 measured · Source: the US BTS May · 78.1% · 247 recorded · 247 measured · Source: the US BTS Jun · 69.1% · 264 recorded · 262 measured · Source: the US BTS Jul · 74.3% · 272 recorded · 268 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Oct · 84.3% · 204 recorded · 204 measured · Source: the US BTS Nov · 83.0% · 228 recorded · 224 measured · Source: the US BTS Dec · 74.6% · 240 recorded · 240 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 · Fewer than 200 measured departures · 189 recorded · 187 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 160 recorded · 159 measured · Source: the US BTS Mar · 11.5 min · 238 recorded · 233 measured · Source: the US BTS Apr · 10.1 min · 240 recorded · 236 measured · Source: the US BTS May · 14.5 min · 247 recorded · 247 measured · Source: the US BTS Jun · 16.7 min · 264 recorded · 262 measured · Source: the US BTS Jul · 16.2 min · 272 recorded · 268 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Oct · 8.1 min · 204 recorded · 204 measured · Source: the US BTS Nov · 6.0 min · 228 recorded · 224 measured · Source: the US BTS Dec · 11.7 min · 240 recorded · 240 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 · 189 · 189 recorded · 187 measured · Source: the US BTS Feb · 160 · 160 recorded · 159 measured · Source: the US BTS Mar · 238 · 238 recorded · 233 measured · Source: the US BTS Apr · 240 · 240 recorded · 236 measured · Source: the US BTS May · 247 · 247 recorded · 247 measured · Source: the US BTS Jun · 264 · 264 recorded · 262 measured · Source: the US BTS Jul · 272 · 272 recorded · 268 measured · Source: the US BTS Aug · 120 · 120 recorded · 120 measured · Source: the US BTS Sep · 112 · 112 recorded · 112 measured · Source: the US BTS Oct · 204 · 204 recorded · 204 measured · Source: the US BTS Nov · 228 · 228 recorded · 224 measured · Source: the US BTS Dec · 240 · 240 recorded · 240 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—187189
FebFewer than 200 measured departures—159160
Mar75.5%11.5 min233238
Apr81.8%10.1 min236240
May78.1%14.5 min247247
Jun69.1%16.7 min262264
Jul74.3%16.2 min268272
AugFewer than 200 measured departures—120120
SepFewer than 200 measured departures—112112
Oct84.3%8.1 min204204
Nov83.0%6.0 min224228
Dec74.6%11.7 min240240

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 78.2% 1,965
  • Delayed >15 min 21.0% 527
  • Cancelled 0.9% 22
  • 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

38
38 of 38
Flight numbersBy direction DeparturesOn time
WN3568 MDW → SAT 109 86.2%
WN2243 SAT → MDW 71 98.6%
WN2039 SAT → MDW 64 89.1%
WN1162 MDW → SAT 59 84.8%
WN1542 MDW → SAT 58 73.7%
WN2350 MDW → SAT 58 80.7%
WN3464 SAT → MDW 58 67.2%
WN3583 SAT → MDW 58 87.7%
WN4168 SAT → MDW 58 98.3%
WN4347 MDW → SAT 58 89.7%
WN1469 MDW → SAT 57 84.2%
WN2168 MDW → SAT 57 87.7%
WN3229 MDW → SAT 57 32.7%
WN424 MDW → SAT 55 81.5%
WN3910 MDW → SAT 52 71.2%
WN3776 MDW → SAT 51 74.0%
WN1525 SAT → MDW 50 96.0%
WN2094 MDW → SAT 50 82.0%
WN3584 SAT → MDW 50 57.1%
WN3819 SAT → MDW 50 68.0%
WN3591 SAT → MDW 46 76.1%
WN1598 SAT → MDW 44 97.7%
WN3912 MDW → SAT 44 61.4%
WN2064 MDW → SAT 42 81.0%
WN2634 SAT → MDW 42 78.1%
WN3911 MDW → SAT 42 64.3%
WN1413 SAT → MDW 35 82.9%
WN3169 SAT → MDW 34 82.4%
WN1489 SAT → MDW 33 97.0%
WN1590 SAT → MDW 33 83.9%
WN2342 SAT → MDW 33 81.8%
WN2471 MDW → SAT 33 75.0%
WN2743 SAT → MDW 33 57.6%
WN3668 MDW → SAT 33 90.9%
WN3823 MDW → SAT 33 68.8%
WN3998 MDW → SAT 33 54.8%
WN457 SAT → MDW 33 45.5%
WN1635 MDW → SAT 31 87.1%

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 122 −16.4% 2 69.7%
June 2026 118 −18.1% 2 59.3%
May 2026 124 +0.8% 0 78.2%
April 2026 118 +0.0% 2 81.4%
March 2026 111 −9.0% 5 64.0%
February 2026 56 −45.6% 0 75.0%
January 2026 72 −37.4% 0 86.1%
December 2025 120 +0.0% 0 68.3%
November 2025 110 −3.5% 4 80.9%
October 2025 124 +55.0% 0 82.3%
September 2025 112 0 87.5%
August 2025 120 0 77.5%
July 2025 146 2 78.1%
June 2025 144 0 77.1%
May 2025 123 0 78.0%
April 2025 118 2 82.2%
March 2025 122 0 86.1%
February 2025 103 1 91.3%
January 2025 115 2 84.3%
December 2024 120 0 80.8%
November 2024 114 0 85.1%
October 2024 80 0 87.5%

How to read this chart

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