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Cheap flights from Seattle to Chicago from $171

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 7/8. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:06 pm - 8:52 pm
SEA
-
ORD
23h 46m
1 stop
Multiple Airlines Logo
5:42 pm - 8:21 pm
ORD
-
SEA
4h 39mnonstop
$341Multiple Airlines
Wed, Jul 8 - Wed, Aug 5
Multiple Airlines Logo
7:06 pm - 1:36 pm
SEA
-
ORD
16h 30m
1 stop
Multiple Airlines Logo
6:00 am - 8:30 am
ORD
-
SEA
4h 30mnonstop
$342Multiple Airlines
Fri, Sep 4 - Mon, Sep 7
Multiple Airlines Logo
8:13 pm - 5:37 am
SEA
-
ORD
7h 24m
1 stop
Multiple Airlines Logo
6:00 am - 8:38 am
ORD
-
SEA
4h 38mnonstop
$343Multiple Airlines
Tue, Jul 14 - Sat, Jul 18
Multiple Airlines Logo
7:06 pm - 8:52 pm
SEA
-
ORD
23h 46m
1 stop
Multiple Airlines Logo
6:00 am - 8:38 am
ORD
-
SEA
4h 38mnonstop
$344Multiple Airlines
Wed, Jul 8 - Tue, Jul 21
Multiple Airlines Logo
1:10 pm - 7:21 pm
SEA
-
ORD
4h 11mnonstop
Multiple Airlines Logo
2:41 pm - 9:19 am
ORD
-
SEA
20h 38m
1 stop
$345Multiple Airlines
Fri, Aug 14 - Thu, Aug 27
Multiple Airlines Logo
7:06 pm - 8:52 pm
SEA
-
ORD
23h 46m
1 stop
Multiple Airlines Logo
6:00 am - 8:38 am
ORD
-
SEA
4h 38mnonstop
$346Multiple Airlines
Wed, Jul 8 - Tue, Jul 21
Multiple Airlines Logo
7:06 pm - 8:52 pm
SEA
-
ORD
23h 46m
1 stop
Multiple Airlines Logo
6:00 am - 8:38 am
ORD
-
SEA
4h 38mnonstop
$347Multiple Airlines
Tue, Jul 7 - Wed, Jul 15
Alaska Airlines Logo
5:48 pm - 11:59 pm
SEA
-
ORD
4h 11mnonstop
Alaska Airlines Logo
6:00 am - 8:38 am
ORD
-
SEA
4h 38mnonstop
$348Alaska Airlines
Fri, Aug 7 - Sun, Aug 9
Multiple Airlines Logo
1:10 pm - 7:21 pm
SEA
-
ORD
4h 11mnonstop
Multiple Airlines Logo
9:57 pm - 9:04 am
ORD
-
SEA
13h 07m
1 stop
$349Multiple Airlines
Fri, Aug 7 - Mon, Aug 10
Delta Logo
9:40 am - 6:19 pm
SEA
-
ORD
6h 39m
1 stop
Delta Logo
5:56 pm - 8:35 pm
ORD
-
SEA
4h 39mnonstop
$350Delta
Fri, Aug 7 - Sat, Aug 8

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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
Aug 7
SEA5:48 pmSeattle/Tacoma Intl
4h 11m
ORD11:59 pmChicago O'Hare Intl
Aug 9
ORD6:00 amChicago O'Hare Intl
4h 38m
SEA8:38 amSeattle/Tacoma Intl
$348
Alaska Airlines
Aug 3
SEA9:28 pmSeattle/Tacoma Intl
5h 32m
1 stop
ORD5:00 amChicago O'Hare Intl
Aug 8
ORD8:20 pmChicago O'Hare Intl
4h 44m
SEA11:04 pmSeattle/Tacoma Intl
$355
Alaska Airlines
Sep 11
SEA10:13 amSeattle/Tacoma Intl
11h 46m
1 stop
ORD11:59 pmChicago O'Hare Intl
Sep 13
ORD6:00 amChicago O'Hare Intl
4h 30m
SEA8:30 amSeattle/Tacoma Intl
$358

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
Jul 2
SEA7:41 pmSeattle/Tacoma Intl
23h 02m
1 stop
ORD8:43 pmChicago O'Hare Intl
Jul 9
ORD9:57 pmChicago O'Hare Intl
13h 20m
1 stop
SEA9:17 amSeattle/Tacoma Intl
$350
Frontier
Jul 8
SEA8:13 pmSeattle/Tacoma Intl
7h 24m
1 stop
ORD5:37 amChicago O'Hare Intl
Jul 12
ORD9:57 pmChicago O'Hare Intl
13h 20m
1 stop
SEA9:17 amSeattle/Tacoma Intl
$351
Frontier
Jun 28
SEA7:41 pmSeattle/Tacoma Intl
23h 02m
1 stop
ORD8:43 pmChicago O'Hare Intl
Jul 1
ORD9:48 pmChicago O'Hare Intl
14h 00m
1 stop
SEA9:48 amSeattle/Tacoma Intl
$359

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 June 27, 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

Wed 7/8

7:06 pm-8:52 pm

1 stop23h 46m

Chicago O'Hare Intl

Wed 8/5

5:42 pm-8:21 pm

Nonstop4h 39m

$341

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 9/4

7:06 pm-1:36 pm

1 stop16h 30m

Chicago O'Hare Intl

Mon 9/7

6:00 am-8:30 am

Nonstop4h 30m

$342

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 7/14

8:13 pm-5:37 am

1 stop7h 24m

Chicago O'Hare Intl

Sat 7/18

6:00 am-8:38 am

Nonstop4h 38m

$343

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 7/8

7:06 pm-8:52 pm

1 stop23h 46m

Chicago O'Hare Intl

Tue 7/21

6:00 am-8:38 am

Nonstop4h 38m

$344

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 8/14

1:10 pm-7:21 pm

Nonstop4h 11m

Chicago O'Hare Intl

Thu 8/27

2:41 pm-9:19 am

1 stop20h 38m

$345

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 7/8

7:06 pm-8:52 pm

1 stop23h 46m

Chicago O'Hare Intl

Tue 7/21

6:00 am-8:38 am

Nonstop4h 38m

$346

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 7/7

7:06 pm-8:52 pm

1 stop23h 46m

Chicago O'Hare Intl

Wed 7/15

6:00 am-8:38 am

Nonstop4h 38m

$347
Quickest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 8/7

5:48 pm-11:59 pm

Nonstop4h 11m

Chicago O'Hare Intl

Sun 8/9

6:00 am-8:38 am

Nonstop4h 38m

$348

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 8/7

1:10 pm-7:21 pm

Nonstop4h 11m

Chicago O'Hare Intl

Mon 8/10

9:57 pm-9:04 am

1 stop13h 07m

$349

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 8/7

9:40 am-6:19 pm

1 stop6h 39m

Chicago O'Hare Intl

Sat 8/8

5:56 pm-8:35 pm

Nonstop4h 39m

$350

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?

The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around $252.

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 $417. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday 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 $511.

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 $355 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $455. 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 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 $328 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 $285 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.

Can stopping save me money on Seattle to Chicago O'Hare Intl Airport flights?

You could potentially save up to 38% 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 June 2026, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 18% 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

$204

Fastest flight time

3h 54m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Seattle in the past 72 hours is $204. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $379.
The fastest flight from Seattle to Chicago O'Hare Intl Airport takes 3h 54m
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?

    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 3h 54m.

  • 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
DeltaPriceFrom $123Free CancellationRating
7.8
8,452 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $124Free CancellationRating
7.8
2,826 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $177Free CancellationRating
7.9
12,581 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $177Free CancellationRating
7.4
9,895 reviews
Search United Airlines flights
American AirlinesPriceFrom $180Free CancellationRating
7.1
11,778 reviews
Search American Airlines flights
FrontierPriceFrom $193Free CancellationRating
5.6
2,864 reviews
Search Frontier flights

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

    Alaska Airlines flies from Seattle to Chicago O'Hare Intl Airport around 33 times per week, with 12,582 momondo users rating the airline 7.9/10. The cheapest Alaska Airlines deal from Seattle to Chicago O'Hare Intl Airport in the last 72 hours was $177 (round-trip), much lower than the average airfare cost of $354 for Alaska Airlines flights on this route.

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

    Across 8,453 Delta reviews on momondo, the average score is 7.8/10. Delta flies from Seattle to Chicago O'Hare Intl Airport about 14 times each week, with ticket deals ranging from $123 to $352. 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
Schaumburg
South Haven
Rockford
Merrillville
Gurnee
Rosemont
Naperville
Orland Park
Oak Brook
New Buffalo
Joliet
Kenosha
Hammond
Aurora
Racine
Janesville
Elgin
Evanston
South Holland

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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