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Cheap flights from Seattle to Chicago from C$ 125

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 13/12. 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

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American Airlines Logo
1:28 p.m. - 7:46 p.m.SEA-ORD
4h 18mdirect
American Airlines Logo
8:34 p.m. - 11:25 p.m.ORD-SEA
4h 51mdirect
C$ 248American Airlines
Find Deal
Wed, 3 Dec - Sat, 6 Dec
Multiple Airlines Logo
4:21 p.m. - 10:30 p.m.SEA-ORD
4h 09mdirect
Multiple Airlines Logo
7:00 a.m. - 11:53 a.m.ORD-SEA
6h 53m1 stop
C$ 249Multiple Airlines
Find Deal
Fri, 5 Dec - Mon, 8 Dec
Alaska Airlines Logo
8:25 a.m. - 2:39 p.m.SEA-ORD
4h 14mdirect
Alaska Airlines Logo
5:51 p.m. - 8:35 p.m.ORD-SEA
4h 44mdirect
C$ 252Alaska Airlines
Find Deal
Sat, 6 Dec - Sat, 6 Dec
United Airlines Logo
7:00 a.m. - 1:08 p.m.SEA-ORD
4h 08mdirect
United Airlines Logo
3:35 p.m. - 6:14 p.m.ORD-SEA
4h 39mdirect
C$ 254United Airlines
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Thu, 1 Jan - Tue, 6 Jan
United Airlines Logo
12:35 p.m. - 11:14 p.m.SEA-ORD
8h 39m1 stop
United Airlines Logo
8:50 a.m. - 11:32 a.m.ORD-SEA
4h 42mdirect
C$ 255United Airlines
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Fri, 9 Jan - Sun, 11 Jan
Alaska Airlines Logo
4:21 p.m. - 10:30 p.m.SEA-ORD
4h 09mdirect
Alaska Airlines Logo
3:35 p.m. - 6:22 p.m.ORD-SEA
4h 47mdirect
C$ 261Alaska Airlines
Find Deal
Sat, 6 Dec - Wed, 10 Dec
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$ 273Southwest
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Thu, 8 Jan - Sat, 10 Jan
Hawaiian Airlines Logo
5:50 p.m. - 11:59 p.m.SEA-ORD
4h 09mdirect
Hawaiian Airlines Logo
6:00 a.m. - 8:41 a.m.ORD-SEA
4h 41mdirect
C$ 279Hawaiian Airlines
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Sat, 6 Dec - Mon, 8 Dec
Southwest Logo
7:05 a.m. - 10:35 p.m.SEA-ORD
13h 30m1 stop
Southwest Logo
3:05 p.m. - 9:15 p.m.ORD-SEA
8h 10m1 stop
C$ 281Southwest
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Wed, 3 Dec - Sat, 6 Dec
Hawaiian Airlines Logo
11:00 p.m. - 5:04 a.m.SEA-ORD
4h 04mdirect
Hawaiian Airlines Logo
9:00 a.m. - 5:36 p.m.ORD-SEA
10h 36m1 stop
C$ 294Hawaiian Airlines
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Tue, 10 Mar - Wed, 11 Mar

American Airlines flights from Seattle to Chicago O'Hare Intl Airport

Our best American Airlines deals on Seattle to Chicago O'Hare Intl Airport flight tickets
American Airlines
3 Dec
SEA1:28 p.m.Seattle/Tacoma Intl
4h 18m
ORD7:46 p.m.Chicago O'Hare Intl
6 Dec
ORD8:34 p.m.Chicago O'Hare Intl
4h 51m
SEA11:25 p.m.Seattle/Tacoma Intl
C$ 248
Find similar
American Airlines
11 Nov
SEA1:35 p.m.Seattle/Tacoma Intl
4h 15m
ORD7:50 p.m.Chicago O'Hare Intl
13 Nov
ORD8:30 p.m.Chicago O'Hare Intl
4h 48m
SEA11:18 p.m.Seattle/Tacoma Intl
C$ 529
Find similar
American Airlines
11 Nov
SEA9:00 a.m.Seattle/Tacoma Intl
4h 08m
ORD3:08 p.m.Chicago O'Hare Intl
13 Nov
ORD5:18 a.m.Chicago O'Hare Intl
9h 51m
1 stop
SEA1:09 p.m.Seattle/Tacoma Intl
C$ 543
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Alaska Airlines flights from Seattle to Chicago O'Hare Intl Airport

Our best Alaska Airlines deals on Seattle to Chicago O'Hare Intl Airport flight tickets
Alaska Airlines
6 Dec
SEA8:25 a.m.Seattle/Tacoma Intl
4h 14m
ORD2:39 p.m.Chicago O'Hare Intl
6 Dec
ORD5:51 p.m.Chicago O'Hare Intl
4h 44m
SEA8:35 p.m.Seattle/Tacoma Intl
C$ 252
Find similar
Alaska Airlines
6 Dec
SEA4:21 p.m.Seattle/Tacoma Intl
4h 09m
ORD10:30 p.m.Chicago O'Hare Intl
10 Dec
ORD3:35 p.m.Chicago O'Hare Intl
4h 47m
SEA6:22 p.m.Seattle/Tacoma Intl
C$ 261
Find similar
Alaska Airlines
14 Dec
SEA12:18 a.m.Seattle/Tacoma Intl
4h 03m
ORD6:21 a.m.Chicago O'Hare Intl
15 Dec
ORD10:00 a.m.Chicago O'Hare Intl
4h 42m
SEA12:42 p.m.Seattle/Tacoma Intl
C$ 266
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momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Chicago O'Hare Intl Airport 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 30 October 2025.
Use the filters below to find and compare flights from Seattle to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 3/12

1:28 p.m.-7:46 p.m.

Nonstop4h 18m

Chicago O'Hare Intl

Sat 6/12

8:34 p.m.-11:25 p.m.

Nonstop4h 51m

C$ 248

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 5/12

4:21 p.m.-10:30 p.m.

Nonstop4h 09m

Chicago O'Hare Intl

Mon 8/12

7:00 a.m.-11:53 a.m.

1 stop6h 53m

C$ 249

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 6/12

8:25 a.m.-2:39 p.m.

Nonstop4h 14m

Chicago O'Hare Intl

Sat 6/12

5:51 p.m.-8:35 p.m.

Nonstop4h 44m

C$ 252

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/1

7:00 a.m.-1:08 p.m.

Nonstop4h 08m

Chicago O'Hare Intl

Tue 6/1

3:35 p.m.-6:14 p.m.

Nonstop4h 39m

C$ 254

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 9/1

12:35 p.m.-11:14 p.m.

1 stop8h 39m

Chicago O'Hare Intl

Sun 11/1

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

Nonstop4h 42m

C$ 255

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 6/12

4:21 p.m.-10:30 p.m.

Nonstop4h 09m

Chicago O'Hare Intl

Wed 10/12

3:35 p.m.-6:22 p.m.

Nonstop4h 47m

C$ 261

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 8/1

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

1 stop7h 15m

Chicago O'Hare Intl

Sat 10/1

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

1 stop8h 55m

C$ 273

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 6/12

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

Nonstop4h 09m

Chicago O'Hare Intl

Mon 8/12

6:00 a.m.-8:41 a.m.

Nonstop4h 41m

C$ 279

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 3/12

7:05 a.m.-10:35 p.m.

1 stop13h 30m

Chicago O'Hare Intl

Sat 6/12

3:05 p.m.-9:15 p.m.

1 stop8h 10m

C$ 281

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/3

11:00 p.m.-5:04 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

Wed 11/3

9:00 a.m.-5:36 p.m.

1 stop10h 36m

C$ 294

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 O'Hare Intl Airport

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 O'Hare Intl Airport?

In general, January is the cheapest month to fly from Seattle to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 358. The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around C$ 373.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Thursday when prices can be found for as low as C$ 491. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Chicago O'Hare Intl Airport for around C$ 984.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

In the afternoon is the cheapest time of day to fly from Seattle to Chicago O'Hare Intl Airport when you can find flight prices for as low as C$ 352. Flying to Chicago O'Hare Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 985 on average. Flights to Chicago O'Hare Intl Airport from Seattle in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl for the best Seattle/Tacoma Intl - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around C$ 432 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Seattle for as low as C$ 372 on momondo.

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Chicago O'Hare Intl 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 O'Hare Intl Airport flights?

You could potentially save up to 31% on your flight if you consider stops on a Seattle to Chicago O'Hare Intl Airport flight.

How have Seattle to Chicago O'Hare Intl Airport flight prices changed over time?

As of October 2025, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 68% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Chicago O'Hare Intl Airport

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

Cheap Seattle to Chicago O'Hare Intl Airport (SEA to ORD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Chicago O'Hare Intl Airport

Best price found

C$ 443

Fastest flight time

3h 53m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Seattle in the past 72 hours is C$ 443. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is C$ 271.
The fastest flight from Seattle to Chicago O'Hare Intl Airport takes 3h 53m
Direct flights go from Seattle to Chicago O'Hare Intl Airport every day.
Search flight deals

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

    The straight-line distance from Seattle/Tacoma Intl to Chicago O'Hare Intl is 2762.2 km. A reasonable flight in good conditions will take 3h 59m.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Chicago O'Hare Intl Airport?

  • What is the most popular airline from Seattle to Chicago O'Hare Intl Airport?

Best airlines flying from Seattle to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Seattle to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom C$ 215Free CancellationRating
8.0
11,217 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Chicago O'Hare Intl Airport

    Alaska Airlines is one of the most popular airlines flying from Seattle to Chicago O'Hare Intl Airport, operating 6 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Chicago O'Hare Intl Airport starts from C$ 215 round-trip, up to an average price of C$ 366. Our users have rated Alaska Airlines at 8.0/10.

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Schaumburg
Rosemont
Hoffman Estates
Northbrook
Tinley Park
Munster
Hammond
Naperville
Glenview
Great Lakes
Wheeling
Des Plaines
Elk Grove Village
Harvard
Merrillville
Oak Brook
Elmhurst
Kenosha
Skokie
Rockford

Why use momondo?

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

It is quick and easy to find Seattle to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.

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

Yes. All flights to Chicago from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Seattle and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of Seattle to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Chicago O'Hare Intl Airport trip

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