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Cheap flights from Seattle to Chicago from C$ 127

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 22/10. 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

Multiple Airlines Logo
12:25 a.m. - 6:28 a.m.SEA-ORD
4h 03mdirect
Multiple Airlines Logo
6:00 a.m. - 8:37 a.m.ORD-SEA
4h 37mdirect
C$ 264Multiple Airlines
Find Deal
Fri, 21 Nov - Mon, 24 Nov
Delta Logo
11:15 a.m. - 5:18 p.m.SEA-ORD
4h 03mdirect
Delta Logo
7:20 a.m. - 2:59 p.m.ORD-SEA
9h 39m1 stop
C$ 265Delta
Find Deal
Tue, 2 Dec - Sun, 7 Dec
Alaska Airlines Logo
6:00 a.m. - 12:03 p.m.SEA-ORD
4h 03mdirect
Alaska Airlines Logo
8:00 a.m. - 10:52 a.m.ORD-SEA
4h 52mdirect
C$ 268Alaska Airlines
Find Deal
Mon, 24 Nov - Wed, 3 Dec
American Airlines Logo
12:59 a.m. - 6:59 a.m.SEA-ORD
4h 00mdirect
American Airlines Logo
8:49 p.m. - 11:39 p.m.ORD-SEA
4h 50mdirect
C$ 269American Airlines
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Fri, 21 Nov - Mon, 24 Nov
Frontier Logo
2:22 p.m. - 10:41 a.m.SEA-ORD
18h 19m2 stops
Frontier Logo
7:15 a.m. - 12:13 p.m.ORD-SEA
6h 58m1 stop
C$ 272Frontier
Find Deal
Sun, 9 Nov - Tue, 11 Nov
United Airlines Logo
5:00 a.m. - 2:55 p.m.SEA-ORD
7h 55m1 stop
United Airlines Logo
7:47 p.m. - 10:30 p.m.ORD-SEA
4h 43mdirect
C$ 279United Airlines
Find Deal
Sat, 25 Oct - Sat, 25 Oct
Alaska Airlines Logo
11:00 p.m. - 5:04 a.m.SEA-ORD
4h 04mdirect
Alaska Airlines Logo
7:45 a.m. - 10:36 a.m.ORD-SEA
4h 51mdirect
C$ 280Alaska Airlines
Find Deal
Tue, 10 Mar - Wed, 11 Mar
Frontier Logo
2:31 p.m. - 12:59 a.m.SEA-ORD
8h 28m1 stop
Frontier Logo
9:54 p.m. - 12:07 p.m.ORD-SEA
16h 13m2 stops
C$ 287Frontier
Find Deal
Fri, 10 Oct - Mon, 13 Oct
United Airlines Logo
4:47 p.m. - 10:47 p.m.SEA-ORD
4h 00mdirect
United Airlines Logo
5:01 a.m. - 9:59 a.m.ORD-SEA
6h 58m1 stop
C$ 298United Airlines
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Thu, 16 Oct - Thu, 23 Oct
American Airlines Logo
12:59 a.m. - 6:59 a.m.SEA-ORD
4h 00mdirect
American Airlines Logo
7:35 a.m. - 10:25 a.m.ORD-SEA
4h 50mdirect
C$ 356American Airlines
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Sat, 8 Nov - Mon, 10 Nov

Frontier flights from Seattle to Chicago O'Hare Intl Airport

Our best Frontier deals on Seattle to Chicago O'Hare Intl Airport flight tickets
Frontier
9 Nov
SEA2:22 p.m.Seattle/Tacoma Intl
18h 19m
2 stops
ORD10:41 a.m.Chicago O'Hare Intl
11 Nov
ORD7:15 a.m.Chicago O'Hare Intl
6h 58m
1 stop
SEA12:13 p.m.Seattle/Tacoma Intl
C$ 272
Find similar
Frontier
10 Oct
SEA2:31 p.m.Seattle/Tacoma Intl
8h 28m
1 stop
ORD12:59 a.m.Chicago O'Hare Intl
13 Oct
ORD9:54 p.m.Chicago O'Hare Intl
16h 13m
2 stops
SEA12:07 p.m.Seattle/Tacoma Intl
C$ 287
Find similar
Frontier
2 Oct
SEA6:12 a.m.Seattle/Tacoma Intl
25h 25m
1 stop
ORD9:37 a.m.Chicago O'Hare Intl
5 Oct
ORD1:03 p.m.Chicago O'Hare Intl
28h 38m
1 stop
SEA3:41 p.m.Seattle/Tacoma Intl
C$ 327
Find similar

Delta flights from Seattle to Chicago O'Hare Intl Airport

Our best Delta deals on Seattle to Chicago O'Hare Intl Airport flight tickets
Delta
2 Dec
SEA11:15 a.m.Seattle/Tacoma Intl
4h 03m
ORD5:18 p.m.Chicago O'Hare Intl
7 Dec
ORD7:20 a.m.Chicago O'Hare Intl
9h 39m
1 stop
SEA2:59 p.m.Seattle/Tacoma Intl
C$ 265
Find similar
Delta
22 Oct
SEA11:15 a.m.Seattle/Tacoma Intl
3h 55m
ORD5:10 p.m.Chicago O'Hare Intl
24 Oct
ORD6:05 p.m.Chicago O'Hare Intl
4h 40m
SEA8:45 p.m.Seattle/Tacoma Intl
C$ 271
Find similar
Delta
13 Nov
SEA7:20 a.m.Seattle/Tacoma Intl
4h 14m
ORD1:34 p.m.Chicago O'Hare Intl
16 Nov
ORD7:47 a.m.Chicago O'Hare Intl
4h 53m
SEA10:40 a.m.Seattle/Tacoma Intl
C$ 285
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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 16 September 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

Fri 21/11

12:25 a.m.-6:28 a.m.

Nonstop4h 03m

Chicago O'Hare Intl

Mon 24/11

6:00 a.m.-8:37 a.m.

Nonstop4h 37m

C$ 264

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 2/12

11:15 a.m.-5:18 p.m.

Nonstop4h 03m

Chicago O'Hare Intl

Sun 7/12

7:20 a.m.-2:59 p.m.

1 stop9h 39m

C$ 265

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 24/11

6:00 a.m.-12:03 p.m.

Nonstop4h 03m

Chicago O'Hare Intl

Wed 3/12

8:00 a.m.-10:52 a.m.

Nonstop4h 52m

C$ 268

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 21/11

12:59 a.m.-6:59 a.m.

Nonstop4h 00m

Chicago O'Hare Intl

Mon 24/11

8:49 p.m.-11:39 p.m.

Nonstop4h 50m

C$ 269

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 9/11

2:22 p.m.-10:41 a.m.

2 stops18h 19m

Chicago O'Hare Intl

Tue 11/11

7:15 a.m.-12:13 p.m.

1 stop6h 58m

C$ 272

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 25/10

5:00 a.m.-2:55 p.m.

1 stop7h 55m

Chicago O'Hare Intl

Sat 25/10

7:47 p.m.-10:30 p.m.

Nonstop4h 43m

C$ 279

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

7:45 a.m.-10:36 a.m.

Nonstop4h 51m

C$ 280

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 10/10

2:31 p.m.-12:59 a.m.

1 stop8h 28m

Chicago O'Hare Intl

Mon 13/10

9:54 p.m.-12:07 p.m.

2 stops16h 13m

C$ 287

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 16/10

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

Nonstop4h 00m

Chicago O'Hare Intl

Thu 23/10

5:01 a.m.-9:59 a.m.

1 stop6h 58m

C$ 298

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 8/11

12:59 a.m.-6:59 a.m.

Nonstop4h 00m

Chicago O'Hare Intl

Mon 10/11

7:35 a.m.-10:25 a.m.

Nonstop4h 50m

C$ 356

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$ 356. The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around C$ 370.

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$ 487. 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$ 992.

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$ 349. 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$ 982 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$ 428 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$ 370 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?

No. A direct flight is the cheapest option for a flight between Seattle to Chicago O'Hare Intl Airport.

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

As of September 2025, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 0% 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$ 524

Fastest flight time

3h 55m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Seattle in the past 72 hours is C$ 524. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is C$ 486.
The fastest flight from Seattle to Chicago O'Hare Intl Airport takes 3h 55m
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 55m.

  • 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$ 261Free CancellationRating
8.0
10,000 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 26 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Chicago O'Hare Intl Airport starts from C$ 189 round-trip, up to an average price of C$ 268. 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
Hoffman Estates
Tinley Park
Munster
Hammond
Naperville
Glenview
Great Lakes
Wheeling
Des Plaines
Harvard
Merrillville
Elk Grove Village
Oak Brook
Elmhurst
Kenosha
Skokie
Rockford
Rosemont

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.

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