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Cheap flights from Seattle to Chicago from C$ 254

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 22/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
12:16 a.m. - 6:20 a.m.
SEA
-
ORD
4h 04mdirect
Alaska Airlines Logo
9:00 a.m. - 11:39 a.m.
ORD
-
SEA
4h 39mdirect
C$ 500Alaska Airlines
Fri, 28 Aug - Sat, 29 Aug
Multiple Airlines Logo
12:17 a.m. - 6:20 a.m.
SEA
-
ORD
4h 03mdirect
Multiple Airlines Logo
7:15 a.m. - 10:39 a.m.
ORD
-
SEA
29h 24m
1 stop
C$ 503Multiple Airlines
Tue, 14 Jul - Tue, 21 Jul
Alaska Airlines Logo
12:17 a.m. - 6:20 a.m.
SEA
-
ORD
4h 03mdirect
Alaska Airlines Logo
1:03 p.m. - 3:41 p.m.
ORD
-
SEA
4h 38mdirect
C$ 507Alaska Airlines
Mon, 17 Aug - Wed, 26 Aug
Alaska Airlines Logo
11:53 a.m. - 6:20 p.m.
SEA
-
ORD
4h 27mdirect
Alaska Airlines Logo
3:49 p.m. - 6:28 p.m.
ORD
-
SEA
4h 39mdirect
C$ 509Alaska Airlines
Sat, 3 Oct - Tue, 6 Oct
Alaska Airlines Logo
5:48 p.m. - 11:59 p.m.
SEA
-
ORD
4h 11mdirect
Alaska Airlines Logo
3:43 p.m. - 6:16 p.m.
ORD
-
SEA
4h 33mdirect
C$ 512Alaska Airlines
Mon, 17 Aug - Sat, 22 Aug
Alaska Airlines Logo
6:00 a.m. - 12:07 p.m.
SEA
-
ORD
4h 07mdirect
Alaska Airlines Logo
2:22 p.m. - 6:51 p.m.
ORD
-
SEA
6h 29m
1 stop
C$ 513Alaska Airlines
Sat, 19 Sep - Sat, 19 Sep
Delta Logo
5:35 p.m. - 11:29 p.m.
SEA
-
ORD
3h 54mdirect
Delta Logo
7:00 a.m. - 9:37 a.m.
ORD
-
SEA
4h 37mdirect
C$ 516Delta
Mon, 17 Aug - Thu, 27 Aug
Sun Country Air Logo
6:36 p.m. - 7:30 p.m.
SEA
-
ORD
22h 54m
1 stop
Sun Country Air Logo
8:05 p.m. - 11:28 a.m.
ORD
-
SEA
17h 23m
1 stop
C$ 519Sun Country Air
Mon, 23 Nov - Mon, 30 Nov
Alaska Airlines Logo
5:51 p.m. - 11:59 p.m.
SEA
-
ORD
4h 08mdirect
Alaska Airlines Logo
2:18 p.m. - 9:40 p.m.
ORD
-
SEA
9h 22m
1 stop
C$ 522Alaska Airlines
Wed, 19 Aug - Wed, 26 Aug
Alaska Airlines Logo
6:00 a.m. - 12:03 p.m.
SEA
-
ORD
4h 03mdirect
Alaska Airlines Logo
8:20 p.m. - 11:04 p.m.
ORD
-
SEA
4h 44mdirect
C$ 523Alaska Airlines
Mon, 3 Aug - Sat, 8 Aug

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Sun Country Air flights from Seattle to Chicago O'Hare Intl Airport

Our best Sun Country Air deals on Seattle to Chicago O'Hare Intl Airport flight tickets
Sun Country Air
23 Nov
SEA6:36 p.m.Seattle/Tacoma Intl
22h 54m
1 stop
ORD7:30 p.m.Chicago O'Hare Intl
30 Nov
ORD8:05 p.m.Chicago O'Hare Intl
17h 23m
1 stop
SEA11:28 a.m.Seattle/Tacoma Intl
C$ 519
Sun Country Air
24 Nov
SEA11:37 a.m.Seattle/Tacoma Intl
20h 14m
1 stop
ORD9:51 a.m.Chicago O'Hare Intl
30 Nov
ORD8:05 p.m.Chicago O'Hare Intl
17h 23m
1 stop
SEA11:28 a.m.Seattle/Tacoma Intl
C$ 533
Sun Country Air
25 Nov
SEA11:59 p.m.Seattle/Tacoma Intl
6h 21m
1 stop
ORD8:20 a.m.Chicago O'Hare Intl
29 Nov
ORD9:18 a.m.Chicago O'Hare Intl
26h 10m
1 stop
SEA9:28 a.m.Seattle/Tacoma Intl
C$ 590

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

Our best United Airlines deals on Seattle to Chicago O'Hare Intl Airport flight tickets
United Airlines
17 Aug
SEA5:13 p.m.Seattle/Tacoma Intl
4h 04m
ORD11:17 p.m.Chicago O'Hare Intl
22 Aug
ORD7:00 a.m.Chicago O'Hare Intl
4h 35m
SEA9:35 a.m.Seattle/Tacoma Intl
C$ 532
United Airlines
4 Sep
SEA5:13 p.m.Seattle/Tacoma Intl
4h 04m
ORD11:17 p.m.Chicago O'Hare Intl
7 Sep
ORD5:55 a.m.Chicago O'Hare Intl
7h 49m
1 stop
SEA11:44 a.m.Seattle/Tacoma Intl
C$ 573
United Airlines
4 Jul
SEA5:00 a.m.Seattle/Tacoma Intl
6h 15m
1 stop
ORD1:15 p.m.Chicago O'Hare Intl
10 Jul
ORD6:17 p.m.Chicago O'Hare Intl
6h 53m
1 stop
SEA11:10 p.m.Seattle/Tacoma Intl
C$ 594

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 2 July 2026.
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

Cheapest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 28/8

12:16 a.m.-6:20 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

Sat 29/8

9:00 a.m.-11:39 a.m.

Nonstop4h 39m

C$ 500

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 14/7

12:17 a.m.-6:20 a.m.

Nonstop4h 03m

Chicago O'Hare Intl

Tue 21/7

7:15 a.m.-10:39 a.m.

1 stop29h 24m

C$ 503

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 17/8

12:17 a.m.-6:20 a.m.

Nonstop4h 03m

Chicago O'Hare Intl

Wed 26/8

1:03 p.m.-3:41 p.m.

Nonstop4h 38m

C$ 507

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 3/10

11:53 a.m.-6:20 p.m.

Nonstop4h 27m

Chicago O'Hare Intl

Tue 6/10

3:49 p.m.-6:28 p.m.

Nonstop4h 39m

C$ 509

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 17/8

5:48 p.m.-11:59 p.m.

Nonstop4h 11m

Chicago O'Hare Intl

Sat 22/8

3:43 p.m.-6:16 p.m.

Nonstop4h 33m

C$ 512

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 19/9

6:00 a.m.-12:07 p.m.

Nonstop4h 07m

Chicago O'Hare Intl

Sat 19/9

2:22 p.m.-6:51 p.m.

1 stop6h 29m

C$ 513
Quickest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 17/8

5:35 p.m.-11:29 p.m.

Nonstop3h 54m

Chicago O'Hare Intl

Thu 27/8

7:00 a.m.-9:37 a.m.

Nonstop4h 37m

C$ 516

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 23/11

6:36 p.m.-7:30 p.m.

1 stop22h 54m

Chicago O'Hare Intl

Mon 30/11

8:05 p.m.-11:28 a.m.

1 stop17h 23m

C$ 519

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 19/8

5:51 p.m.-11:59 p.m.

Nonstop4h 08m

Chicago O'Hare Intl

Wed 26/8

2:18 p.m.-9:40 p.m.

1 stop9h 22m

C$ 522

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 3/8

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

Nonstop4h 03m

Chicago O'Hare Intl

Sat 8/8

8:20 p.m.-11:04 p.m.

Nonstop4h 44m

C$ 523

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 typical price of a round-trip flight between Seattle and Chicago O'Hare Intl Airport?

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

In general, February 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$ 351. The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around C$ 358.

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$ 686. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, 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$ 1,056.

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$ 362. 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$ 1,017 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 from Seattle 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$ 470 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$ 422 on momondo.

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

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

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

As of July 2026, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 29% cheaper 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$ 289

Fastest flight time

4h 07m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Seattle in the past 72 hours is C$ 289. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is C$ 541.
The fastest flight from Seattle to Chicago O'Hare Intl Airport takes 4h 07m
Direct flights go from Seattle to Chicago O'Hare Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Seattle to Chicago O'Hare Intl Airport

  • 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 4h 07m.

  • 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 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?

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Schaumburg
Glenview
Waukegan
Rosemont
Des Plaines
Merrillville
Kenosha
Northbrook
Evanston
Tinley Park
Downers Grove
Great Lakes
Hammond
Harvey
Naperville
Munster
Harvard
Hoffman Estates
Elmhurst
DeKalb

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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