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

Promo Code

Low fares from Chicago (Midway) to Seattle/Tacoma

$

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 11/03/2026

One-way

Basic

From
$139
Seen: 9 hrs ago

Chicago (Midway) (MDW)to

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

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: 5 hrs ago

Chicago (Midway) (MDW)to

Seattle/Tacoma (SEA)
Depart: 09/01/2026

One-way

Basic

From
$139
Seen: 5 hrs ago

Chicago (Midway) (MDW)to

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

One-way

Basic

From
$139
Seen: 1 hour ago

Chicago (Midway) (MDW)to

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

One-way

Basic

From
$139
Seen: 21 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Chicago (Midway) to Seattle/Tacoma

Aug 2026
From$149*
Seen: 5 hrs ago
One Way/Basic
Sep 2026
From$139*
Seen: 16 hrs ago
One Way/Basic
Oct 2026
From$139*
Seen: 21 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $139
cmp-daily-histogram-bars-legend-max-price-aria-label $262
Displaying fares for August-2026
  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    02

    Sun

    AUG

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    03

    Mon

  • MDW–SEA, 08/04/2026: From $224
    04

    Tue

  • MDW–SEA, 08/05/2026: From $224
    05

    Wed

  • MDW–SEA, 08/06/2026: From $262
    06

    Thu

  • MDW–SEA, 08/07/2026: From $252
    07

    Fri

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

    Sat

  • MDW–SEA, 08/09/2026: From $252
    09

    Sun

  • MDW–SEA, 08/10/2026: From $224
    10

    Mon

  • MDW–SEA, 08/11/2026: From $224
    11

    Tue

  • MDW–SEA, 08/12/2026: From $234
    12

    Wed

  • MDW–SEA, 08/13/2026: From $224
    13

    Thu

  • MDW–SEA, 08/14/2026: From $234
    14

    Fri

  • MDW–SEA, 08/15/2026: From $224
    15

    Sat

  • MDW–SEA, 08/16/2026: From $234
    16

    Sun

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    17

    Mon

  • MDW–SEA, 08/18/2026: From $224
    18

    Tue

  • MDW–SEA, 08/19/2026: From $234
    19

    Wed

  • MDW–SEA, 08/20/2026: From $224
    20

    Thu

  • MDW–SEA, 08/21/2026: From $224
    21

    Fri

  • MDW–SEA, 08/22/2026: From $199
    22

    Sat

  • MDW–SEA, 08/23/2026: From $229
    23

    Sun

  • MDW–SEA, 08/24/2026: From $189
    24

    Mon

  • MDW–SEA, 08/25/2026: From $189
    25

    Tue

  • MDW–SEA, 08/26/2026: From $149
    26

    Wed

  • MDW–SEA, 08/27/2026: From $159
    27

    Thu

  • MDW–SEA, 08/28/2026: From $169
    28

    Fri

  • MDW–SEA, 08/29/2026: From $149
    29

    Sat

  • MDW–SEA, 08/30/2026: From $169
    30

    Sun

  • MDW–SEA: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

  • MDW–SEA, 09/01/2026: From $139
    01

    Tue

    SEP

    • Range$139-$262

    *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.

    Explore Flights from Other Popular Origins

    Popular Flights from Chicago (Midway)