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Cheap flights from Seattle to Chicago from C$ 131

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Chicago departing on 16/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

United Airlines Logo
4:47 p.m. - 10:47 p.m.SEA-ORD
4h 00mdirect
United Airlines Logo
4:10 p.m. - 6:49 p.m.ORD-SEA
4h 39mdirect
C$ 262United Airlines
Find Deal
mié., 1 oct. - mar., 7 oct.
Delta Logo
5:59 p.m. - 11:59 p.m.SEA-ORD
4h 00mdirect
Delta Logo
7:10 a.m. - 9:45 a.m.ORD-SEA
4h 35mdirect
C$ 264Delta
Find Deal
sáb., 20 sep. - sáb., 27 sep.
Frontier Logo
8:43 p.m. - 11:53 p.m.SEA-ORD
25h 10m1 stop
Frontier Logo
6:50 a.m. - 12:07 p.m.ORD-SEA
7h 17m1 stop
C$ 268Frontier
Find Deal
vie., 10 oct. - lun., 13 oct.
United Airlines Logo
8:00 a.m. - 6:25 p.m.SEA-ORD
8h 25m1 stop
United Airlines Logo
4:10 p.m. - 6:49 p.m.ORD-SEA
4h 39mdirect
C$ 270United Airlines
Find Deal
mié., 24 sep. - mié., 1 oct.
Alaska Airlines Logo
5:50 p.m. - 11:59 p.m.SEA-ORD
4h 09mdirect
Alaska Airlines Logo
8:20 a.m. - 5:34 p.m.ORD-SEA
11h 14m1 stop
C$ 275Alaska Airlines
Find Deal
mar., 7 oct. - mar., 14 oct.
Alaska Airlines Logo
12:59 a.m. - 7:03 a.m.SEA-ORD
4h 04mdirect
Alaska Airlines Logo
10:00 a.m. - 12:34 p.m.ORD-SEA
4h 34mdirect
C$ 286Alaska Airlines
Find Deal
mar., 23 sep. - mié., 24 sep.
Hawaiian Airlines Logo
12:59 a.m. - 7:03 a.m.SEA-ORD
4h 04mdirect
Hawaiian Airlines Logo
6:20 a.m. - 8:52 a.m.ORD-SEA
4h 32mdirect
C$ 303Hawaiian Airlines
Find Deal
mar., 16 sep. - dom., 21 sep.
Logo
3:59 p.m. - 10:07 p.m.SEA-ORD
4h 08mdirect
Logo
6:00 a.m. - 12:30 a.m.ORD-SEA
20h 30m1 stop
C$ 322
Find Deal
vie., 26 sep. - dom., 28 sep.
Logo
3:59 p.m. - 10:07 p.m.SEA-ORD
4h 08mdirect
Logo
6:00 a.m. - 12:30 a.m.ORD-SEA
20h 30m1 stop
C$ 349
Find Deal
vie., 26 sep. - dom., 28 sep.
Hawaiian Airlines Logo
12:59 a.m. - 7:03 a.m.SEA-ORD
4h 04mdirect
Hawaiian Airlines Logo
6:00 a.m. - 8:27 a.m.ORD-SEA
4h 27mdirect
C$ 383Hawaiian Airlines
Find Deal
vie., 26 sep. - dom., 5 oct.

Delta flights from Seattle to Chicago

Our best Delta deals on Seattle to Chicago flight tickets
Delta
20 Sep
SEA5:59 p.m.Seattle/Tacoma Intl
4h 00m
ORD11:59 p.m.Chicago O'Hare Intl
27 Sep
ORD7:10 a.m.Chicago O'Hare Intl
4h 35m
SEA9:45 a.m.Seattle/Tacoma Intl
C$ 264
Find similar
Delta
21 Nov
SEA11:15 a.m.Seattle/Tacoma Intl
4h 03m
ORD5:18 p.m.Chicago O'Hare Intl
27 Nov
ORD7:47 a.m.Chicago O'Hare Intl
4h 53m
SEA10:40 a.m.Seattle/Tacoma Intl
C$ 302
Find similar
Delta
18 Sep
SEA5:55 p.m.Seattle/Tacoma Intl
4h 00m
ORD11:55 p.m.Chicago O'Hare Intl
20 Sep
ORD2:25 p.m.Chicago O'Hare Intl
4h 34m
SEA4:59 p.m.Seattle/Tacoma Intl
C$ 309
Find similar

United Airlines flights from Seattle to Chicago

Our best United Airlines deals on Seattle to Chicago flight tickets
United Airlines
1 Oct
SEA4:47 p.m.Seattle/Tacoma Intl
4h 00m
ORD10:47 p.m.Chicago O'Hare Intl
7 Oct
ORD4:10 p.m.Chicago O'Hare Intl
4h 39m
SEA6:49 p.m.Seattle/Tacoma Intl
C$ 262
Find similar
United Airlines
24 Sep
SEA8:00 a.m.Seattle/Tacoma Intl
8h 25m
1 stop
ORD6:25 p.m.Chicago O'Hare Intl
1 Oct
ORD4:10 p.m.Chicago O'Hare Intl
4h 39m
SEA6:49 p.m.Seattle/Tacoma Intl
C$ 270
Find similar
United Airlines
3 Sep
SEA8:00 a.m.Seattle/Tacoma Intl
8h 25m
1 stop
ORD6:25 p.m.Chicago O'Hare Intl
13 Sep
ORD7:10 a.m.Chicago O'Hare Intl
4h 33m
SEA9:43 a.m.Seattle/Tacoma Intl
C$ 291
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Chicago that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 26 agosto 2025.
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

mié. 1/10

4:47 p.m.-10:47 p.m.

Nonstop4h 00m

Chicago O'Hare Intl

mar. 7/10

4:10 p.m.-6:49 p.m.

Nonstop4h 39m

C$ 262

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

sáb. 20/9

5:59 p.m.-11:59 p.m.

Nonstop4h 00m

Chicago O'Hare Intl

sáb. 27/9

7:10 a.m.-9:45 a.m.

Nonstop4h 35m

C$ 264

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

vie. 10/10

8:43 p.m.-11:53 p.m.

1 stop25h 10m

Chicago O'Hare Intl

lun. 13/10

6:50 a.m.-12:07 p.m.

1 stop7h 17m

C$ 268

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

mié. 24/9

8:00 a.m.-6:25 p.m.

1 stop8h 25m

Chicago O'Hare Intl

mié. 1/10

4:10 p.m.-6:49 p.m.

Nonstop4h 39m

C$ 270

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

mar. 7/10

5:50 p.m.-11:59 p.m.

Nonstop4h 09m

Chicago O'Hare Intl

mar. 14/10

8:20 a.m.-5:34 p.m.

1 stop11h 14m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

mar. 23/9

12:59 a.m.-7:03 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

mié. 24/9

10:00 a.m.-12:34 p.m.

Nonstop4h 34m

C$ 286

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

mar. 16/9

12:59 a.m.-7:03 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

dom. 21/9

6:20 a.m.-8:52 a.m.

Nonstop4h 32m

C$ 303

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

vie. 26/9

3:59 p.m.-10:07 p.m.

Nonstop4h 08m

Chicago O'Hare Intl

dom. 28/9

6:00 a.m.-12:30 a.m.

1 stop20h 30m

C$ 322

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

vie. 26/9

3:59 p.m.-10:07 p.m.

Nonstop4h 08m

Chicago O'Hare Intl

dom. 28/9

6:00 a.m.-12:30 a.m.

1 stop20h 30m

C$ 349

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

vie. 26/9

12:59 a.m.-7:03 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

dom. 5/10

6:00 a.m.-8:27 a.m.

Nonstop4h 27m

C$ 383

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

How to get the cheapest flight ticket from Seattle to Chicago

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Chicago?

The month of September is another great option to travel to Chicago, with average flight prices from Seattle averaging around C$ 353.

What is the cheapest day to depart on your flight to Chicago?

The cheapest day to depart on your flight to Chicago is on a Thursday when prices can be found for as low as C$ 578. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around C$ 978. These prices are subject to change though, so be sure to set up a Price Alert for flights to Chicago.

What is the cheapest time of day to depart on your flight to Chicago?

In the afternoon is the cheapest time of day to fly from Seattle to Chicago when you can find flight prices for as low as C$ 344. Flying to Chicago in the afternoon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Chicago, so prices are often more expensive at around C$ 940 per ticket.

What is the cheapest Seattle/Tacoma Intl to Chicago flight route?

Fly from Seattle/Tacoma Intl to Chicago Midway for the best Seattle/Tacoma Intl - Chicago flight prices

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around C$ 422 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Seattle for as low as C$ 360 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Chicago flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Chicago flights?

No. A direct flight is the cheapest option for a flight between Seattle to Chicago.

How have Seattle to Chicago flight prices changed over time?

As of August 2025, prices for Seattle to Chicago flights are approximately 31% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Chicago according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Chicago (SEA to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Chicago

Best price found

C$ 134

Fastest flight time

3h 55m

Direct flights

Every day

Airports in Chicago

1 airport
The best one-way flight to Chicago from Seattle in the past 72 hours is C$ 134. The best round-trip flight deal from Seattle to Chicago found on momondo in the last 72 hours is C$ 331.
The fastest flight from Seattle to Chicago takes 3h 55m
Direct flights go from Seattle to Chicago every day.
There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)
Search flight deals

  • How far is Seattle/Tacoma Intl to Chicago by plane?

    A flight from Seattle/Tacoma Intl to Chicago will travel around 2787.8 km. Flights usually cover this in 3h 55m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Chicago?

    Prices for flights from Seattle/Tacoma Intl Airport to Chicago are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Chicago?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Chicago?

  • What is the most popular airline from Seattle to Chicago?

Best airlines flying from Seattle to Chicago

Compare and see reviews for airlines that fly from Seattle to Chicago with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom C$ 261Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Chicago

    Alaska Airlines operates around 32 flights from Seattle to Chicago every week. The average price of these flights found in the last 72 hours has been C$ 263, but momondo users have found Alaska Airlines deals from Seattle to Chicago from as low as C$ 189 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Munster
Hammond
Merrillville

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Chicago?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Chicago . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Chicago with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Chicago from Seattle with this policy.

How can momondo help me find flights from Seattle to Chicago?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Chicago.

I’m not ready to book a flight from Seattle to Chicago right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Chicago from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Chicago trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 25.6 km from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport