Southwest® flights from Chicago (Midway) to Seattle/Tacoma from $139

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Low fares from Chicago (Midway) to Seattle/Tacoma

$

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 10/03/2026

One-way

Basic

From
$139
Seen: 11 hrs ago

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 10/17/2026

One-way

Basic

From
$139
Seen: 8 hrs ago

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 09/22/2026

One-way

Basic

From
$139
Seen: 17 hrs ago

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 09/29/2026

One-way

Basic

From
$139
Seen: 23 hrs ago

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 09/30/2026

One-way

Basic

From
$139
Seen: 20 hrs ago

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 10/27/2026

One-way

Basic

From
$139
Seen: 13 hrs ago

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Explore flights from Chicago (Midway) to Seattle/Tacoma

Aug 2026
From$224*
Seen: 1 hour ago
One Way/Basic
Sep 2026
From$139*
Seen: 23 hrs ago
One Way/Basic
Oct 2026
From$139*
Seen: 13 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $139
cmp-daily-histogram-bars-legend-max-price-aria-label $319
Displaying fares for August-2026
  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

    AUG

  • MDW–SEA, 08/24/2026: From $224
    24

    Mon

  • MDW–SEA, 08/25/2026: From $224
    25

    Tue

  • MDW–SEA, 08/26/2026: From $224
    26

    Wed

  • MDW–SEA, 08/27/2026: From $224
    27

    Thu

  • MDW–SEA, 08/28/2026: From $224
    28

    Fri

  • MDW–SEA, 08/29/2026: From $234
    29

    Sat

  • MDW–SEA, 08/30/2026: From $234
    30

    Sun

  • MDW–SEA, 08/31/2026: From $224
    31

    Mon

  • MDW–SEA, 09/01/2026: From $224
    01

    Tue

    SEP

  • MDW–SEA, 09/02/2026: From $234
    02

    Wed

  • MDW–SEA, 09/03/2026: From $262
    03

    Thu

  • MDW–SEA, 09/04/2026: From $234
    04

    Fri

  • MDW–SEA, 09/05/2026: From $215
    05

    Sat

  • MDW–SEA, 09/06/2026: From $205
    06

    Sun

  • MDW–SEA, 09/07/2026: From $319
    07

    Mon

  • MDW–SEA, 09/08/2026: From $224
    08

    Tue

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • MDW–SEA, 09/10/2026: From $205
    10

    Thu

  • MDW–SEA, 09/11/2026: From $205
    11

    Fri

  • MDW–SEA, 09/12/2026: From $149
    12

    Sat

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    14

    Mon

  • MDW–SEA, 09/15/2026: From $139
    15

    Tue

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

  • MDW–SEA, 09/17/2026: From $149
    17

    Thu

  • MDW–SEA, 09/18/2026: From $179
    18

    Fri

  • MDW–SEA, 09/19/2026: From $149
    19

    Sat

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • MDW–SEA, 09/21/2026: From $149
    21

    Mon

  • MDW–SEA, 09/22/2026: From $139
    22

    Tue

    • Range$139-$319

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Chicago Midway International Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Average flight time:
    4 hours 34 minutes
    Distance:
    1733 miles

    Route Information

    148† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 1‡ Nonstop flight on Sunday

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    The average flight time from Chicago (Midway) to Seattle/Tacoma is 4 hours 34 minutes.
    There are 148 weekly flights from Chicago (Midway) to Seattle/Tacoma on Southwest Airlines.
    Yes, Southwest flies nonstop from Chicago (Midway) to Seattle/Tacoma once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Chicago (Midway) to Seattle/Tacoma once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Chicago (Midway) to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
    You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
    Yes! Flights from Chicago (Midway) to Seattle/Tacoma—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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