(opens popup)(opens new window)Opens new window. External site which may or may not meet accessibility guidelines.External site which may or may not meet accessibility guidelines.(opens popup). There is information in the previous heading.There is information in the previous heading.(close popup)External site which may or may not meet accessibility guidelines.
Flights from Chicago (MDW) to Seattle/Tacoma (SEA)
Book low fares from Chicago (Midway) to Seattle/Tacoma with Southwest Airlines®. It’s easy to find the Chicago Midway International Airport to Seattle-Tacoma International Airport flight to make your booking and travel a breeze. Whether you’re traveling for business or pleasure, solo or with the whole family, you’ll enjoy flying Southwest®. Have flexible travel dates? Plug them into the Low Fare Calendar and see the lowest fares available within your travel window. You may also want to browse Southwest Vacations® to see special offers and package deals on flights, hotels, rental cars, and more.
Explore your options and book your Chicago (Midway) to Seattle/Tacoma flight with Southwest today!
Tripadvisor has rated us #1.
Best Airline in the U.S. and North America & Best Economy Class and Low Cost Airline in North America.
During the ongoing COVID-19 pandemic, the availability, health and safety procedures, operations, and schedules for local attractions are changing constantly. Please contact attractions directly for hours of operation, potential temperature screenings, and other possible health and safety procedures and restrictions. Visit our Coronavirus Travel Information page for information about potential restrictions on air travel.
Flight details
Average flight time: 4 hours 35 minutes
Departing from: Chicago Midway International Airport (MDW)
Arriving at: Seattle-Tacoma International Airport (SEA)
†Based on DOT published scheduled average flights Monday-Friday between 1/29/2021 and 3/31/2021, as of 2/4/2021.
Travel tips
Infancy policy
One child over 14 days and under two (2) years of age, not occupying a seat, may be carried free of charge when traveling with an adult (12 years of age or older). Learn more.
Pet policy
Customers flying with a pet are subject to a pet fare. To learn more about traveling with your furry friend, explore the Southwest® pet policy.
Unaccompanied minor
Minors under the age of 18 are not permitted to fly unaccompanied on international flights or any itinerary that includes an international flight. Learn more.
Bags fly free®1
Start packing! Every ticketed Customer’s first two checked bags are free. Learn more.
The Southwest travel experience
Seattle-Tacoma International Airport is almost equidistant from Seattle and Tacoma. Get going!
At Southwest, we know it takes more than great deals on Seattle/Tacoma airfares and convenient scheduling options to make your trip memorable. So from booking to boarding, we offer services and features designed to make your travel from Chicago (Midway) to Seattle/Tacoma the best it can be. Find out more about the Southwest® Experience before you book your Chicago Midway International Airport to Seattle-Tacoma International Airport flight.
Flying with Southwest is simple and fun, no matter which of our dozens of exciting destinations you choose. And when you search for your next flight to Seattle/Tacoma, you know you won’t be surprised at checkout. Low fares, no hidden fees. That’s our Transfarency® promise. And, as always, bags fly free. Enroll in our Click 'N Save® emails and stay up to date on our latest flight deals. Looking for tours, activities, and more hidden gems to add to your Seattle/Tacoma adventure? Explore getaways with Southwest® and earn Rapid Rewards® points when you fly.
1First and second checked bags. Weight and size limits apply.
2Fare difference may apply.
Questions we hear the most
The average flight time from Chicago (Midway) to Seattle/Tacoma is 4 hours 35 minutes.
There are 10 flights daily from Chicago (Midway) to Seattle/Tacoma on Southwest Airlines.
Southwest flies nonstop from Chicago (Midway) to Seattle/Tacoma once daily.
To find the cheapest day and time to fly Chicago (Midway) to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
