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2,961 km · Domestic

Chicago Midway (MDW) – Oakland San Francisco Bay (OAK)

In July 2026, 115 flights operated between Chicago Midway and Oakland San Francisco Bay (both directions), and 64.3% 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
January64640.0%
February5856▼ 3.4%
March70104▲ 48.6%
April62106▲ 71.0%
May62104▲ 67.7%
June67112▲ 67.2%
July70115▲ 64.3%
August73––
September68––
October70–in progress
November64––
December66––
Year to date (Jan–Jul)453661▲ 45.9%

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
January79.7%82.8%▲ 3.9%
February86.2%89.3%▲ 3.6%
March78.6%63.5%▼ 19.2%
April74.2%67.9%▼ 8.5%
May83.9%72.1%▼ 14.1%
June76.1%62.5%▼ 17.9%
July70.0%64.3%▼ 8.1%
August78.1%––
September83.8%––
October74.3%–in progress
November75.0%––
December59.1%––
Year-to-date average (Jan–Jul)78.4%71.8%▼ 8.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January00–
February00–
March15▲ 400.0%
April00–
May00–
June00–
July01–
August0––
September0––
October0–in progress
November2––
December0––
Year to date (Jan–Jul)16▲ 500.0%

By direction

MDW → OAK

Scheduled flights
838
Flights operated
831
Cancelled
7 · 0.8%
On-time departures
62.1%

OAK → MDW

Scheduled flights
834
Flights operated
832
Cancelled
2 · 0.2%
On-time departures
84.5%

MDW → OAK and OAK → MDW counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 1,672 100.0% 73.3% 9

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 delay05:00–06:004.2min · 332 recorded · 331 measured
Recorded flights1,672MDW–OAK

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 · 92.2% · 332 recorded · 331 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 85 recorded · 85 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 88 recorded · 87 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 84 recorded · 84 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 160 recorded · 158 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 163 recorded · 162 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 49 recorded · 49 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 98 recorded · 98 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 77 recorded · 77 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 18 recorded · 18 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 29 recorded · 29 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 140 recorded · 137 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 5 recorded · 4 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 149 recorded · 149 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 · 4.2 min · 332 recorded · 331 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 85 recorded · 85 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 88 recorded · 87 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 84 recorded · 84 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 160 recorded · 158 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 163 recorded · 162 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 24 recorded · 24 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 9 recorded · 9 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 49 recorded · 49 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 98 recorded · 98 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 77 recorded · 77 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 18 recorded · 18 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 29 recorded · 29 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 140 recorded · 137 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 5 recorded · 4 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 149 recorded · 149 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 · 332 · 332 recorded · 331 measured · Source: the US BTS 06:00 · 85 · 85 recorded · 85 measured · Source: the US BTS 07:00 · 88 · 88 recorded · 87 measured · Source: the US BTS 08:00 · 84 · 84 recorded · 84 measured · Source: the US BTS 09:00 · 62 · 62 recorded · 62 measured · Source: the US BTS 10:00 · 160 · 160 recorded · 158 measured · Source: the US BTS 11:00 · 163 · 163 recorded · 162 measured · Source: the US BTS 12:00 · 24 · 24 recorded · 24 measured · Source: the US BTS 13:00 · 81 · 81 recorded · 81 measured · Source: the US BTS 14:00 · 9 · 9 recorded · 9 measured · Source: the US BTS 15:00 · 49 · 49 recorded · 49 measured · Source: the US BTS 16:00 · 98 · 98 recorded · 98 measured · Source: the US BTS 17:00 · 77 · 77 recorded · 77 measured · Source: the US BTS 18:00 · 19 · 19 recorded · 19 measured · Source: the US BTS 19:00 · 18 · 18 recorded · 18 measured · Source: the US BTS 20:00 · 29 · 29 recorded · 29 measured · Source: the US BTS 21:00 · 140 · 140 recorded · 137 measured · Source: the US BTS 22:00 · 5 · 5 recorded · 4 measured · Source: the US BTS 23:00 · 149 · 149 recorded · 149 measured · Source: the US BTS

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

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———
05:0092.2%4.2 min331332
06:00Fewer than 200 measured departures—8585
07:00Fewer than 200 measured departures—8788
08:00Fewer than 200 measured departures—8484
09:00Fewer than 200 measured departures—6262
10:00Fewer than 200 measured departures—158160
11:00Fewer than 200 measured departures—162163
12:00Fewer than 200 measured departures—2424
13:00Fewer than 200 measured departures—8181
14:00Fewer than 200 measured departures—99
15:00Fewer than 200 measured departures—4949
16:00Fewer than 200 measured departures—9898
17:00Fewer than 200 measured departures—7777
18:00Fewer than 200 measured departures—1919
19:00Fewer than 200 measured departures—1818
20:00Fewer than 200 measured departures—2929
21:00Fewer than 200 measured departures—137140
22:00Fewer than 200 measured departures—45
23:00Fewer than 200 measured departures—149149

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 68.1% · 236 recorded · 235 measured · Source: the US BTS Tuesday · 75.9% · 237 recorded · 236 measured · Source: the US BTS Wednesday · 79.2% · 237 recorded · 236 measured · Source: the US BTS Thursday · 72.5% · 238 recorded · 236 measured · Source: the US BTS Friday · 76.0% · 238 recorded · 237 measured · Source: the US BTS Saturday · 73.3% · 231 recorded · 228 measured · Source: the US BTS Sunday · 68.6% · 255 recorded · 255 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 · 18.1 min · 236 recorded · 235 measured · Source: the US BTS Tuesday · 13.3 min · 237 recorded · 236 measured · Source: the US BTS Wednesday · 12.3 min · 237 recorded · 236 measured · Source: the US BTS Thursday · 13.9 min · 238 recorded · 236 measured · Source: the US BTS Friday · 13.8 min · 238 recorded · 237 measured · Source: the US BTS Saturday · 12.4 min · 231 recorded · 228 measured · Source: the US BTS Sunday · 16.0 min · 255 recorded · 255 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 · 236 · 236 recorded · 235 measured · Source: the US BTS Tuesday · 237 · 237 recorded · 236 measured · Source: the US BTS Wednesday · 237 · 237 recorded · 236 measured · Source: the US BTS Thursday · 238 · 238 recorded · 236 measured · Source: the US BTS Friday · 238 · 238 recorded · 237 measured · Source: the US BTS Saturday · 231 · 231 recorded · 228 measured · Source: the US BTS Sunday · 255 · 255 recorded · 255 measured · Source: the US BTS

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

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday68.1%18.1 min235236
Tuesday75.9%13.3 min236237
Wednesday79.2%12.3 min236237
Thursday72.5%13.9 min236238
Friday76.0%13.8 min237238
Saturday73.3%12.4 min228231
Sunday68.6%16.0 min255255

Month of year

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

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 128 · 128 recorded · 128 measured · Source: the US BTS Feb · 114 · 114 recorded · 114 measured · Source: the US BTS Mar · 180 · 180 recorded · 174 measured · Source: the US BTS Apr · 168 · 168 recorded · 168 measured · Source: the US BTS May · 166 · 166 recorded · 166 measured · Source: the US BTS Jun · 179 · 179 recorded · 179 measured · Source: the US BTS Jul · 186 · 186 recorded · 185 measured · Source: the US BTS Aug · 73 · 73 recorded · 73 measured · Source: the US BTS Sep · 68 · 68 recorded · 68 measured · Source: the US BTS Oct · 144 · 144 recorded · 144 measured · Source: the US BTS Nov · 132 · 132 recorded · 130 measured · Source: the US BTS Dec · 134 · 134 recorded · 134 measured · Source: the US BTS

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

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—128128
FebFewer than 200 measured departures—114114
MarFewer than 200 measured departures—174180
AprFewer than 200 measured departures—168168
MayFewer than 200 measured departures—166166
JunFewer than 200 measured departures—179179
JulFewer than 200 measured departures—185186
AugFewer than 200 measured departures—7373
SepFewer than 200 measured departures—6868
OctFewer than 200 measured departures—144144
NovFewer than 200 measured departures—130132
DecFewer than 200 measured departures—134134

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 72.9% 1,219
  • Delayed >15 min 26.6% 444
  • Cancelled 0.5% 9
  • 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

19
19 of 19
Flight numbersBy direction DeparturesOn time
WN1665 OAK → MDW 86 88.4%
WN3643 MDW → OAK 61 55.7%
WN585 OAK → MDW 61 93.4%
WN189 OAK → MDW 58 98.3%
WN3059 OAK → MDW 58 56.9%
WN3552 OAK → MDW 58 77.6%
WN4248 OAK → MDW 58 93.1%
WN1743 MDW → OAK 57 64.9%
WN3123 OAK → MDW 57 89.5%
WN3366 MDW → OAK 50 68.0%
WN2363 OAK → MDW 46 87.0%
WN2578 MDW → OAK 46 76.1%
WN3551 OAK → MDW 42 92.9%
WN3725 MDW → OAK 40 67.5%
WN4042 MDW → OAK 34 36.4%
WN2484 MDW → OAK 33 58.1%
WN2937 MDW → OAK 33 75.8%
WN4069 OAK → MDW 32 71.9%
WN2449 MDW → OAK 31 64.5%

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 115 +64.3% 1 64.3%
June 2026 112 +67.2% 0 62.5%
May 2026 104 +67.7% 0 72.1%
April 2026 106 +71.0% 0 67.9%
March 2026 104 +48.6% 5 63.5%
February 2026 56 −3.4% 0 89.3%
January 2026 64 +0.0% 0 82.8%
December 2025 66 −2.9% 0 59.1%
November 2025 64 −3.0% 2 75.0%
October 2025 70 −5.4% 0 74.3%
September 2025 68 0 83.8%
August 2025 73 0 78.1%
July 2025 70 0 70.0%
June 2025 67 0 76.1%
May 2025 62 0 83.9%
April 2025 62 0 74.2%
March 2025 70 1 78.6%
February 2025 58 0 86.2%
January 2025 64 0 79.7%
December 2024 68 0 69.1%
November 2024 66 0 75.8%
October 2024 74 0 74.3%

How to read this chart

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