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Cheap flights from Seattle to Chicago from $90

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 12/13. 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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0 bags

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Cheap round-trip flights

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Multiple Airlines Logo
11:01 am - 11:42 amSEA-ORD
22h 41m1 stop
Multiple Airlines Logo
5:51 pm - 8:35 pmORD-SEA
4h 44mnonstop
$178Multiple Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
American Airlines Logo
12:38 am - 6:42 amSEA-ORD
4h 04mnonstop
American Airlines Logo
9:45 am - 12:38 pmORD-SEA
4h 53mnonstop
$179American Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
12:38 am - 6:42 amSEA-ORD
4h 04mnonstop
American Airlines Logo
8:34 pm - 11:25 pmORD-SEA
4h 51mnonstop
$180American Airlines
Find Deal
Fri, Dec 5 - Wed, Dec 10
Alaska Airlines Logo
8:25 am - 2:39 pmSEA-ORD
4h 14mnonstop
Alaska Airlines Logo
5:51 pm - 8:35 pmORD-SEA
4h 44mnonstop
$181Alaska Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 6
Alaska Airlines Logo
5:50 pm - 11:59 pmSEA-ORD
4h 09mnonstop
Alaska Airlines Logo
5:51 pm - 8:35 pmORD-SEA
4h 44mnonstop
$187Alaska Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
United Airlines Logo
12:35 pm - 11:14 pmSEA-ORD
8h 39m1 stop
United Airlines Logo
8:50 am - 11:32 amORD-SEA
4h 42mnonstop
$190United Airlines
Find Deal
Thu, Jan 8 - Sat, Jan 10
Hawaiian Airlines Logo
5:50 pm - 11:59 pmSEA-ORD
4h 09mnonstop
Hawaiian Airlines Logo
6:00 am - 8:41 amORD-SEA
4h 41mnonstop
$200Hawaiian Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 8
Hawaiian Airlines Logo
10:43 am - 4:55 pmSEA-ORD
4h 12mnonstop
Hawaiian Airlines Logo
8:00 am - 10:52 amORD-SEA
4h 52mnonstop
$210Hawaiian Airlines
Find Deal
Sat, Dec 6 - Sat, Dec 13
Delta Logo
5:55 pm - 11:59 pmSEA-ORD
4h 04mnonstop
Delta Logo
6:10 pm - 8:50 pmORD-SEA
4h 40mnonstop
$227Delta
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Tue, Dec 2 - Thu, Dec 4
Delta Logo
5:55 pm - 11:59 pmSEA-ORD
4h 04mnonstop
Delta Logo
7:50 am - 10:41 amORD-SEA
4h 51mnonstop
$228Delta
Find Deal
Thu, Dec 4 - Wed, Dec 10

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
Dec 3
SEA12:38 amSeattle/Tacoma Intl
4h 04m
ORD6:42 amChicago O'Hare Intl
Dec 10
ORD9:45 amChicago O'Hare Intl
4h 53m
SEA12:38 pmSeattle/Tacoma Intl
$179
Find similar
American Airlines
Dec 5
SEA12:38 amSeattle/Tacoma Intl
4h 04m
ORD6:42 amChicago O'Hare Intl
Dec 10
ORD8:34 pmChicago O'Hare Intl
4h 51m
SEA11:25 pmSeattle/Tacoma Intl
$180
Find similar
American Airlines
Dec 4
SEA12:38 amSeattle/Tacoma Intl
4h 04m
ORD6:42 amChicago O'Hare Intl
Dec 9
ORD9:45 amChicago O'Hare Intl
4h 53m
SEA12:38 pmSeattle/Tacoma Intl
$198
Find similar

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
Dec 6
SEA8:25 amSeattle/Tacoma Intl
4h 14m
ORD2:39 pmChicago O'Hare Intl
Dec 6
ORD5:51 pmChicago O'Hare Intl
4h 44m
SEA8:35 pmSeattle/Tacoma Intl
$181
Find similar
Alaska Airlines
Dec 6
SEA5:50 pmSeattle/Tacoma Intl
4h 09m
ORD11:59 pmChicago O'Hare Intl
Dec 9
ORD5:51 pmChicago O'Hare Intl
4h 44m
SEA8:35 pmSeattle/Tacoma Intl
$187
Find similar
Alaska Airlines
Dec 4
SEA4:21 pmSeattle/Tacoma Intl
4h 09m
ORD10:30 pmChicago O'Hare Intl
Dec 10
ORD3:05 pmChicago O'Hare Intl
11h 07m
1 stop
SEA12:12 amSeattle/Tacoma Intl
$191
Find similar

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 832,500 searches. Data last updated October 30, 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

Thu 12/4

11:01 am-11:42 am

1 stop22h 41m

Chicago O'Hare Intl

Wed 12/10

5:51 pm-8:35 pm

Nonstop4h 44m

$178

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 12/3

12:38 am-6:42 am

Nonstop4h 04m

Chicago O'Hare Intl

Wed 12/10

9:45 am-12:38 pm

Nonstop4h 53m

$179

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 12/5

12:38 am-6:42 am

Nonstop4h 04m

Chicago O'Hare Intl

Wed 12/10

8:34 pm-11:25 pm

Nonstop4h 51m

$180

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 12/6

8:25 am-2:39 pm

Nonstop4h 14m

Chicago O'Hare Intl

Sat 12/6

5:51 pm-8:35 pm

Nonstop4h 44m

$181

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 12/6

5:50 pm-11:59 pm

Nonstop4h 09m

Chicago O'Hare Intl

Tue 12/9

5:51 pm-8:35 pm

Nonstop4h 44m

$187

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/8

12:35 pm-11:14 pm

1 stop8h 39m

Chicago O'Hare Intl

Sat 1/10

8:50 am-11:32 am

Nonstop4h 42m

$190

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 12/6

5:50 pm-11:59 pm

Nonstop4h 09m

Chicago O'Hare Intl

Mon 12/8

6:00 am-8:41 am

Nonstop4h 41m

$200

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 12/6

10:43 am-4:55 pm

Nonstop4h 12m

Chicago O'Hare Intl

Sat 12/13

8:00 am-10:52 am

Nonstop4h 52m

$210

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 12/2

5:55 pm-11:59 pm

Nonstop4h 04m

Chicago O'Hare Intl

Thu 12/4

6:10 pm-8:50 pm

Nonstop4h 40m

$227

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 12/4

5:55 pm-11:59 pm

Nonstop4h 04m

Chicago O'Hare Intl

Wed 12/10

7:50 am-10:41 am

Nonstop4h 51m

$228

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?

The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around $268.

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 Wednesday when prices can be found for as low as $394. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $497.

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

Flying to Chicago O'Hare Intl Airport from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $289 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $457. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $310 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 $267 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.

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 69% 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

$170

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 $170. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $310.
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?

    Seattle/Tacoma Intl and Chicago O'Hare Intl are 1716.3 mi apart from one another. In terms of flight time, this usually takes a little over 4h 03m.

  • 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 refreshed on a daily basis.

  • 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?

    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 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
Spirit AirlinesPriceFrom $107Free CancellationRating
6.3
8,115 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $121Free CancellationRating
7.8
2,797 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $126Free CancellationRating
7.9
7,993 reviews
Search Delta flights
FrontierPriceFrom $137Free CancellationRating
5.8
3,123 reviews
Search Frontier flights
United AirlinesPriceFrom $167Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $176Free CancellationRating
8.0
11,214 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $180Free CancellationRating
7.2
11,032 reviews
Search American Airlines flights

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

    Alaska Airlines flies from Seattle to Chicago O'Hare Intl Airport around 6 times per week, with 11,214 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Seattle to Chicago O'Hare Intl Airport in the last 72 hours was $176 (round-trip), much lower than the average airfare cost of $332 for Alaska Airlines flights on this route.

  • Delta Flights From Seattle to Chicago O'Hare Intl Airport

    Across 7,993 Delta reviews on momondo, the average score is 7.9/10. Delta flies from Seattle to Chicago O'Hare Intl Airport about 4 times each week, with ticket deals ranging from $126 to $299. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
South Haven
Schaumburg
Rockford
Merrillville
Gurnee
Naperville
Rosemont
Kenosha
New Buffalo
Joliet
Oak Brook
Orland Park
Racine
Hammond
Tinley Park
Janesville
Aurora
Elgin
Benton Harbor

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Chicago for you.

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?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Chicago from Seattle.

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

Yes. momondo can track prices for Seattle to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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