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Cheap flights from Seattle to Chicago from C$ 128

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 7/3. 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

Enter your travel dates to find the best prices.
Delta Logo
7:10 a.m. - 1:22 p.m.
SEA
-
ORD
4h 12mdirect
Delta Logo
7:30 a.m. - 10:15 a.m.
ORD
-
SEA
4h 45mdirect
C$ 242Delta
Mon, 26 Jan - Sat, 31 Jan
Alaska Airlines Logo
5:55 p.m. - 11:56 p.m.
SEA
-
ORD
4h 01mdirect
Alaska Airlines Logo
1:00 p.m. - 3:46 p.m.
ORD
-
SEA
4h 46mdirect
C$ 243Alaska Airlines
Fri, 27 Feb - Mon, 2 Mar
Southwest Logo
1:20 p.m. - 10:35 p.m.
SEA
-
ORD
7h 15m1 stop
Southwest Logo
2:15 p.m. - 9:10 p.m.
ORD
-
SEA
8h 55m1 stop
C$ 249Southwest
Wed, 28 Jan - Sat, 31 Jan
United Airlines Logo
12:40 p.m. - 12:28 a.m.
SEA
-
ORD
9h 48m1 stop
United Airlines Logo
8:50 a.m. - 11:32 a.m.
ORD
-
SEA
4h 42mdirect
C$ 250United Airlines
Sat, 17 Jan - Mon, 19 Jan
Alaska Airlines Logo
9:45 p.m. - 1:10 p.m.
SEA
-
ORD
13h 25m1 stop
Alaska Airlines Logo
8:00 a.m. - 10:46 a.m.
ORD
-
SEA
4h 46mdirect
C$ 256Alaska Airlines
Wed, 28 Jan - Sat, 31 Jan
Southwest Logo
1:20 p.m. - 10:35 p.m.
SEA
-
ORD
7h 15m1 stop
Southwest Logo
4:25 p.m. - 11:05 p.m.
ORD
-
SEA
8h 40m1 stop
C$ 268Southwest
Wed, 21 Jan - Wed, 28 Jan
Alaska Airlines Logo
5:50 p.m. - 11:50 p.m.
SEA
-
ORD
4h 00mdirect
Alaska Airlines Logo
3:44 p.m. - 10:15 p.m.
ORD
-
SEA
8h 31m1 stop
C$ 269Alaska Airlines
Mon, 26 Jan - Wed, 28 Jan
Southwest Logo
12:00 p.m. - 10:35 p.m.
SEA
-
ORD
8h 35m1 stop
Southwest Logo
4:25 p.m. - 11:05 p.m.
ORD
-
SEA
8h 40m1 stop
C$ 271Southwest
Sat, 17 Jan - Sun, 18 Jan
Alaska Airlines Logo
9:45 p.m. - 1:10 p.m.
SEA
-
ORD
13h 25m1 stop
Alaska Airlines Logo
3:44 p.m. - 10:15 p.m.
ORD
-
SEA
8h 31m1 stop
C$ 282Alaska Airlines
Wed, 28 Jan - Sat, 31 Jan
Delta Logo
7:15 a.m. - 1:25 p.m.
SEA
-
ORD
4h 10mdirect
Delta Logo
7:00 p.m. - 11:40 p.m.
ORD
-
SEA
6h 40m1 stop
C$ 283Delta
Tue, 24 Mar - Sun, 29 Mar

Alaska Airlines flights from Seattle to Chicago

Our best Alaska Airlines deals on Seattle to Chicago flight tickets
Alaska Airlines
22 Jan
SEA8:30 a.m.Seattle/Tacoma Intl
4h 08m
ORD2:38 p.m.Chicago O'Hare Intl
29 Jan
ORD3:35 p.m.Chicago O'Hare Intl
4h 47m
SEA6:22 p.m.Seattle/Tacoma Intl
C$ 242
Find similar
Alaska Airlines
27 Feb
SEA5:55 p.m.Seattle/Tacoma Intl
4h 01m
ORD11:56 p.m.Chicago O'Hare Intl
2 Mar
ORD1:00 p.m.Chicago O'Hare Intl
4h 46m
SEA3:46 p.m.Seattle/Tacoma Intl
C$ 243
Find similar
Alaska Airlines
29 Jan
SEA7:50 p.m.Seattle/Tacoma Intl
15h 20m
1 stop
ORD1:10 p.m.Chicago O'Hare Intl
2 Feb
ORD6:06 p.m.Chicago O'Hare Intl
4h 50m
SEA8:56 p.m.Seattle/Tacoma Intl
C$ 256
Find similar

United Airlines flights from Seattle to Chicago

Our best United Airlines deals on Seattle to Chicago flight tickets
United Airlines
6 Feb
SEA12:57 p.m.Seattle/Tacoma Intl
9h 31m
1 stop
ORD12:28 a.m.Chicago O'Hare Intl
8 Feb
ORD7:54 p.m.Chicago O'Hare Intl
4h 49m
SEA10:43 p.m.Seattle/Tacoma Intl
C$ 250
Find similar
United Airlines
16 Jan
SEA12:57 p.m.Seattle/Tacoma Intl
9h 31m
1 stop
ORD12:28 a.m.Chicago O'Hare Intl
19 Jan
ORD7:54 p.m.Chicago O'Hare Intl
4h 49m
SEA10:43 p.m.Seattle/Tacoma Intl
C$ 314
Find similar
United Airlines
16 Jan
SEA2:10 p.m.Seattle/Tacoma Intl
4h 07m
ORD8:17 p.m.Chicago O'Hare Intl
19 Jan
ORD7:00 a.m.Chicago O'Hare Intl
8h 57m
1 stop
SEA1:57 p.m.Seattle/Tacoma Intl
C$ 317
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 28 December 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

Mon 26/1

7:10 a.m.-1:22 p.m.

Nonstop4h 12m

Chicago O'Hare Intl

Sat 31/1

7:30 a.m.-10:15 a.m.

Nonstop4h 45m

C$ 242

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 27/2

5:55 p.m.-11:56 p.m.

Nonstop4h 01m

Chicago O'Hare Intl

Mon 2/3

1:00 p.m.-3:46 p.m.

Nonstop4h 46m

C$ 243

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 28/1

1:20 p.m.-10:35 p.m.

1 stop7h 15m

Chicago O'Hare Intl

Sat 31/1

2:15 p.m.-9:10 p.m.

1 stop8h 55m

C$ 249

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 17/1

12:40 p.m.-12:28 a.m.

1 stop9h 48m

Chicago O'Hare Intl

Mon 19/1

8:50 a.m.-11:32 a.m.

Nonstop4h 42m

C$ 250

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 28/1

9:45 p.m.-1:10 p.m.

1 stop13h 25m

Chicago O'Hare Intl

Sat 31/1

8:00 a.m.-10:46 a.m.

Nonstop4h 46m

C$ 256

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 21/1

1:20 p.m.-10:35 p.m.

1 stop7h 15m

Chicago O'Hare Intl

Wed 28/1

4:25 p.m.-11:05 p.m.

1 stop8h 40m

C$ 268

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 26/1

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

Nonstop4h 00m

Chicago O'Hare Intl

Wed 28/1

3:44 p.m.-10:15 p.m.

1 stop8h 31m

C$ 269

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 17/1

12:00 p.m.-10:35 p.m.

1 stop8h 35m

Chicago O'Hare Intl

Sun 18/1

4:25 p.m.-11:05 p.m.

1 stop8h 40m

C$ 271

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 28/1

9:45 p.m.-1:10 p.m.

1 stop13h 25m

Chicago O'Hare Intl

Sat 31/1

3:44 p.m.-10:15 p.m.

1 stop8h 31m

C$ 282

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 24/3

7:15 a.m.-1:25 p.m.

Nonstop4h 10m

Chicago O'Hare Intl

Sun 29/3

7:00 p.m.-11:40 p.m.

1 stop6h 40m

C$ 283

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 February is another great option to travel to Chicago, with average flight prices from Seattle averaging around C$ 351.

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$ 499. 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 Tuesday because tickets tend to average around C$ 990. 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$ 346. 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$ 982 per ticket.

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

Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl 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$ 418 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$ 362 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?

You could potentially save up to 24% on your flight if you consider stops on a Seattle to Chicago flight.

How have Seattle to Chicago flight prices changed over time?

As of December 2025, prices for Seattle to Chicago flights are approximately 28% more expensive 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$ 450

Fastest flight time

4h 08m

Direct flights

Every day

Airports in Chicago

3 airports
The best one-way flight to Chicago from Seattle in the past 72 hours is C$ 450. The best round-trip flight deal from Seattle to Chicago found on momondo in the last 72 hours is C$ 948.
The fastest flight from Seattle to Chicago takes 4h 08m
Direct flights go from Seattle to Chicago every day.
There are 3 airports in Chicago. From Seattle there are direct flights to 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 4h 08m, 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
Hawaiian AirlinesPriceFrom C$ 119Free CancellationRating
7.8
2,820 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom C$ 211Free CancellationRating
8.0
11,554 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Chicago

    Alaska Airlines operates around 26 flights from Seattle to Chicago every week. The average price of these flights found in the last 72 hours has been C$ 366, but momondo users have found Alaska Airlines deals from Seattle to Chicago from as low as C$ 211 round-trip. Alaska Airlines has been scored 8.0/10 in 11,554 reviews.

  • Hawaiian Airlines Flights From Seattle to Chicago

    Across 2,820 Hawaiian Airlines reviews on momondo, the average score is 7.8/10. Hawaiian Airlines flies from Seattle to Chicago about 30 times each week, with ticket deals ranging from C$ 119 to C$ 481. Price data is based on momondo searches in the last 72 hours.

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

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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