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2,811 km · Domestic

Chicago Midway (MDW) – Portland (PDX)

In July 2026, 167 flights operated between Chicago Midway and Portland (both directions), and 62.9% 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
January62620.0%
February56560.0%
March62111▲ 79.0%
April60119▲ 98.3%
May62120▲ 93.5%
June156158▲ 1.3%
July175167▼ 4.6%
August168––
September164––
October108–in progress
November60––
December62––
Year to date (Jan–Jul)633793▲ 25.3%

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
January90.3%82.3%▼ 8.9%
February89.3%83.9%▼ 6.0%
March88.7%74.8%▼ 15.7%
April80.0%79.0%▼ 1.3%
May83.9%80.0%▼ 4.6%
June71.8%60.8%▼ 15.3%
July67.4%62.9%▼ 6.7%
August77.4%––
September87.8%––
October82.4%–in progress
November80.0%––
December67.7%––
Year-to-date average (Jan–Jul)81.6%74.8%▼ 8.3%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January00–
February00–
March05–
April01–
May02–
June00–
July13▲ 200.0%
August0––
September0––
October0–in progress
November1––
December0––
Year to date (Jan–Jul)111▲ 1,000.0%

By direction

MDW → PDX

Scheduled flights
1,095
Flights operated
1,088
Cancelled
7 · 0.6%
On-time departures
67.9%

PDX → MDW

Scheduled flights
1,096
Flights operated
1,090
Cancelled
6 · 0.5%
On-time departures
86.5%

MDW → PDX and PDX → MDW counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 2,191 100.0% 77.2% 13

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 delay06:00–07:003.2min · 352 recorded · 351 measured
Recorded flights2,191MDW–PDX

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 · 170 recorded · 168 measured · Source: the US BTS 06:00 · 93.5% · 352 recorded · 351 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 85 recorded · 85 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 187 recorded · 187 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 109 recorded · 109 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 163 recorded · 162 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 33 recorded · 33 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 · 117 recorded · 116 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 88 recorded · 88 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 129 recorded · 129 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 27 recorded · 27 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 47 recorded · 47 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 110 recorded · 110 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 143 recorded · 138 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 74 recorded · 74 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 150 recorded · 147 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 · 170 recorded · 168 measured · Source: the US BTS 06:00 · 3.2 min · 352 recorded · 351 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 85 recorded · 85 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 187 recorded · 187 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 109 recorded · 109 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 163 recorded · 162 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 81 recorded · 81 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 33 recorded · 33 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 · 117 recorded · 116 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 88 recorded · 88 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 129 recorded · 129 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 27 recorded · 27 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 47 recorded · 47 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 45 recorded · 45 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 110 recorded · 110 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 143 recorded · 138 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 74 recorded · 74 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 150 recorded · 147 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 · 170 · 170 recorded · 168 measured · Source: the US BTS 06:00 · 352 · 352 recorded · 351 measured · Source: the US BTS 07:00 · 85 · 85 recorded · 85 measured · Source: the US BTS 08:00 · 187 · 187 recorded · 187 measured · Source: the US BTS 09:00 · 109 · 109 recorded · 109 measured · Source: the US BTS 10:00 · 163 · 163 recorded · 162 measured · Source: the US BTS 11:00 · 81 · 81 recorded · 81 measured · Source: the US BTS 12:00 · 33 · 33 recorded · 33 measured · Source: the US BTS 13:00 · 81 · 81 recorded · 81 measured · Source: the US BTS 14:00 · 117 · 117 recorded · 116 measured · Source: the US BTS 15:00 · 88 · 88 recorded · 88 measured · Source: the US BTS 16:00 · 129 · 129 recorded · 129 measured · Source: the US BTS 17:00 · 27 · 27 recorded · 27 measured · Source: the US BTS 18:00 · 47 · 47 recorded · 47 measured · Source: the US BTS 19:00 · 45 · 45 recorded · 45 measured · Source: the US BTS 20:00 · 110 · 110 recorded · 110 measured · Source: the US BTS 21:00 · 143 · 143 recorded · 138 measured · Source: the US BTS 22:00 · 74 · 74 recorded · 74 measured · Source: the US BTS 23:00 · 150 · 150 recorded · 147 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—168170
06:0093.5%3.2 min351352
07:00Fewer than 200 measured departures—8585
08:00Fewer than 200 measured departures—187187
09:00Fewer than 200 measured departures—109109
10:00Fewer than 200 measured departures—162163
11:00Fewer than 200 measured departures—8181
12:00Fewer than 200 measured departures—3333
13:00Fewer than 200 measured departures—8181
14:00Fewer than 200 measured departures—116117
15:00Fewer than 200 measured departures—8888
16:00Fewer than 200 measured departures—129129
17:00Fewer than 200 measured departures—2727
18:00Fewer than 200 measured departures—4747
19:00Fewer than 200 measured departures—4545
20:00Fewer than 200 measured departures—110110
21:00Fewer than 200 measured departures—138143
22:00Fewer than 200 measured departures—7474
23:00Fewer than 200 measured departures—147150

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 76.4% · 328 recorded · 326 measured · Source: the US BTS Tuesday · 78.7% · 328 recorded · 328 measured · Source: the US BTS Wednesday · 79.3% · 328 recorded · 328 measured · Source: the US BTS Thursday · 73.9% · 332 recorded · 329 measured · Source: the US BTS Friday · 75.0% · 330 recorded · 328 measured · Source: the US BTS Saturday · 84.2% · 282 recorded · 278 measured · Source: the US BTS Sunday · 73.6% · 263 recorded · 261 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 · 15.8 min · 328 recorded · 326 measured · Source: the US BTS Tuesday · 10.8 min · 328 recorded · 328 measured · Source: the US BTS Wednesday · 10.4 min · 328 recorded · 328 measured · Source: the US BTS Thursday · 13.7 min · 332 recorded · 329 measured · Source: the US BTS Friday · 12.5 min · 330 recorded · 328 measured · Source: the US BTS Saturday · 6.8 min · 282 recorded · 278 measured · Source: the US BTS Sunday · 14.9 min · 263 recorded · 261 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 · 328 · 328 recorded · 326 measured · Source: the US BTS Tuesday · 328 · 328 recorded · 328 measured · Source: the US BTS Wednesday · 328 · 328 recorded · 328 measured · Source: the US BTS Thursday · 332 · 332 recorded · 329 measured · Source: the US BTS Friday · 330 · 330 recorded · 328 measured · Source: the US BTS Saturday · 282 · 282 recorded · 278 measured · Source: the US BTS Sunday · 263 · 263 recorded · 261 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday76.4%15.8 min326328
Tuesday78.7%10.8 min328328
Wednesday79.3%10.4 min328328
Thursday73.9%13.7 min329332
Friday75.0%12.5 min328330
Saturday84.2%6.8 min278282
Sunday73.6%14.9 min261263

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 · 124 recorded · 124 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 178 recorded · 173 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 180 recorded · 179 measured · Source: the US BTS May · Fewer than 200 measured departures · 184 recorded · 182 measured · Source: the US BTS Jun · 66.2% · 314 recorded · 314 measured · Source: the US BTS Jul · 65.2% · 346 recorded · 342 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 168 recorded · 168 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 164 recorded · 164 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 174 recorded · 174 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 123 recorded · 122 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 124 recorded · 124 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 · 124 recorded · 124 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 112 recorded · 112 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 178 recorded · 173 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 180 recorded · 179 measured · Source: the US BTS May · Fewer than 200 measured departures · 184 recorded · 182 measured · Source: the US BTS Jun · 18.7 min · 314 recorded · 314 measured · Source: the US BTS Jul · 18.3 min · 346 recorded · 342 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 168 recorded · 168 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 164 recorded · 164 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 174 recorded · 174 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 123 recorded · 122 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 124 recorded · 124 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 · 124 · 124 recorded · 124 measured · Source: the US BTS Feb · 112 · 112 recorded · 112 measured · Source: the US BTS Mar · 178 · 178 recorded · 173 measured · Source: the US BTS Apr · 180 · 180 recorded · 179 measured · Source: the US BTS May · 184 · 184 recorded · 182 measured · Source: the US BTS Jun · 314 · 314 recorded · 314 measured · Source: the US BTS Jul · 346 · 346 recorded · 342 measured · Source: the US BTS Aug · 168 · 168 recorded · 168 measured · Source: the US BTS Sep · 164 · 164 recorded · 164 measured · Source: the US BTS Oct · 174 · 174 recorded · 174 measured · Source: the US BTS Nov · 123 · 123 recorded · 122 measured · Source: the US BTS Dec · 124 · 124 recorded · 124 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—124124
FebFewer than 200 measured departures—112112
MarFewer than 200 measured departures—173178
AprFewer than 200 measured departures—179180
MayFewer than 200 measured departures—182184
Jun66.2%18.7 min314314
Jul65.2%18.3 min342346
AugFewer than 200 measured departures—168168
SepFewer than 200 measured departures—164164
OctFewer than 200 measured departures—174174
NovFewer than 200 measured departures—122123
DecFewer than 200 measured departures—124124

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 76.8% 1,682
  • Delayed >15 min 22.6% 496
  • Cancelled 0.6% 13
  • 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

32
32 of 32
Flight numbersBy direction DeparturesOn time
WN3049 PDX → MDW 105 93.3%
WN3245 MDW → PDX 64 75.0%
WN1656 MDW → PDX 60 50.0%
WN4170 PDX → MDW 60 56.7%
WN2039 MDW → PDX 59 57.6%
WN4016 PDX → MDW 59 89.8%
WN2678 PDX → MDW 58 96.6%
WN3203 PDX → MDW 58 86.0%
WN3579 MDW → PDX 58 57.1%
WN3708 PDX → MDW 58 96.5%
WN1162 PDX → MDW 57 94.7%
WN2852 MDW → PDX 57 34.6%
WN407 PDX → MDW 57 94.7%
WN2735 PDX → MDW 51 94.0%
WN2497 MDW → PDX 50 78.0%
WN2765 MDW → PDX 50 72.0%
WN2809 MDW → PDX 50 90.0%
WN3735 MDW → PDX 50 68.0%
WN1766 MDW → PDX 47 72.3%
WN2884 PDX → MDW 47 91.5%
WN3874 MDW → PDX 43 62.8%
WN3202 PDX → MDW 42 31.0%
WN4765 MDW → PDX 42 11.9%
WN4169 PDX → MDW 36 86.1%
WN3698 MDW → PDX 35 48.6%
WN2121 MDW → PDX 34 82.4%
WN280 PDX → MDW 33 83.9%
WN3975 MDW → PDX 33 75.0%
WN743 MDW → PDX 33 87.9%
WN2149 PDX → MDW 32 87.5%
WN3976 MDW → PDX 32 45.2%
WN4161 PDX → MDW 32 93.6%

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 167 −4.6% 3 62.9%
June 2026 158 +1.3% 0 60.8%
May 2026 120 +93.5% 2 80.0%
April 2026 119 +98.3% 1 79.0%
March 2026 111 +79.0% 5 74.8%
February 2026 56 +0.0% 0 83.9%
January 2026 62 +0.0% 0 82.3%
December 2025 62 +0.0% 0 67.7%
November 2025 60 −3.2% 1 80.0%
October 2025 108 +63.6% 0 82.4%
September 2025 164 0 87.8%
August 2025 168 0 77.4%
July 2025 175 1 67.4%
June 2025 156 0 71.8%
May 2025 62 0 83.9%
April 2025 60 0 80.0%
March 2025 62 0 88.7%
February 2025 56 0 89.3%
January 2025 62 0 90.3%
December 2024 62 0 83.9%
November 2024 62 0 87.1%
October 2024 66 0 90.9%

How to read this chart

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