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Cheap flights from Seattle to Chicago from $144

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 6/14. 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

Enter your travel dates to find the best prices.
Frontier Logo
9:16 pm - 11:57 am
SEA
-
ORD
12h 41m
1 stop
Frontier Logo
1:02 pm - 11:31 am
ORD
-
SEA
24h 29m
1 stop
$260Frontier
Wed, Oct 21 - Mon, Oct 26
Frontier Logo
8:12 pm - 5:28 am
SEA
-
ORD
7h 16m
1 stop
Frontier Logo
9:57 pm - 9:49 am
ORD
-
SEA
13h 52m
1 stop
$270Frontier
Thu, Jul 30 - Sat, Aug 8
Frontier Logo
11:03 am - 6:19 am
SEA
-
ORD
17h 16m
1 stop
Frontier Logo
9:48 pm - 9:48 am
ORD
-
SEA
14h 00m
1 stop
$274Frontier
Wed, Aug 26 - Sat, Aug 29
Frontier Logo
7:50 pm - 8:32 pm
SEA
-
ORD
22h 42m
1 stop
Frontier Logo
9:37 pm - 10:06 am
ORD
-
SEA
14h 29m
1 stop
$276Frontier
Tue, Jun 2 - Fri, Jun 5
Frontier Logo
8:20 pm - 5:07 am
SEA
-
ORD
30h 47m
1 stop
Frontier Logo
9:48 pm - 9:48 am
ORD
-
SEA
14h 00m
1 stop
$278Frontier
Mon, Jun 8 - Fri, Jun 19
Frontier Logo
7:41 pm - 8:43 pm
SEA
-
ORD
23h 02m
1 stop
Frontier Logo
7:20 am - 10:35 am
ORD
-
SEA
29h 15m
1 stop
$279Frontier
Fri, Jun 26 - Mon, Jun 29
Frontier Logo
9:16 pm - 11:57 am
SEA
-
ORD
12h 41m
1 stop
Frontier Logo
10:40 pm - 9:51 am
ORD
-
SEA
13h 11m
1 stop
$280Frontier
Wed, Sep 16 - Sat, Sep 26
Frontier Logo
2:20 pm - 5:07 am
SEA
-
ORD
12h 47m
1 stop
Frontier Logo
7:20 am - 10:35 am
ORD
-
SEA
29h 15m
1 stop
$282Frontier
Tue, Jun 16 - Tue, Jun 23
Multiple Airlines Logo
8:12 pm - 5:28 am
SEA
-
ORD
7h 16m
1 stop
Multiple Airlines Logo
5:42 pm - 8:21 pm
ORD
-
SEA
4h 39mnonstop
$283Multiple Airlines
Tue, Aug 11 - Tue, Aug 18
Frontier Logo
2:20 pm - 5:07 am
SEA
-
ORD
12h 47m
1 stop
Frontier Logo
7:20 am - 10:35 am
ORD
-
SEA
29h 15m
1 stop
$284Frontier
Tue, Jun 16 - Tue, Jun 23

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
Oct 21
SEA9:16 pmSeattle/Tacoma Intl
12h 41m
1 stop
ORD11:57 amChicago O'Hare Intl
Oct 26
ORD1:02 pmChicago O'Hare Intl
24h 29m
1 stop
SEA11:31 amSeattle/Tacoma Intl
$260
Frontier
Jul 30
SEA8:12 pmSeattle/Tacoma Intl
7h 16m
1 stop
ORD5:28 amChicago O'Hare Intl
Aug 8
ORD9:57 pmChicago O'Hare Intl
13h 52m
1 stop
SEA9:49 amSeattle/Tacoma Intl
$270
Frontier
Aug 26
SEA11:03 amSeattle/Tacoma Intl
17h 16m
1 stop
ORD6:19 amChicago O'Hare Intl
Aug 29
ORD9:48 pmChicago O'Hare Intl
14h 00m
1 stop
SEA9:48 amSeattle/Tacoma Intl
$274

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
Jun 3
SEA5:42 pmSeattle/Tacoma Intl
4h 17m
ORD11:59 pmChicago O'Hare Intl
Jun 6
ORD5:52 pmChicago O'Hare Intl
4h 38m
SEA8:30 pmSeattle/Tacoma Intl
$331
Alaska Airlines
May 24
SEA1:30 pmSeattle/Tacoma Intl
8h 25m
1 stop
ORD11:55 pmChicago O'Hare Intl
May 30
ORD6:00 amChicago O'Hare Intl
4h 34m
SEA8:34 amSeattle/Tacoma Intl
$333
Alaska Airlines
May 24
SEA8:10 amSeattle/Tacoma Intl
4h 22m
ORD2:32 pmChicago O'Hare Intl
May 30
ORD7:40 amChicago O'Hare Intl
4h 41m
SEA10:21 amSeattle/Tacoma Intl
$341

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 May 16, 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 10/21

9:16 pm-11:57 am

1 stop12h 41m

Chicago O'Hare Intl

Mon 10/26

1:02 pm-11:31 am

1 stop24h 29m

$260

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 7/30

8:12 pm-5:28 am

1 stop7h 16m

Chicago O'Hare Intl

Sat 8/8

9:57 pm-9:49 am

1 stop13h 52m

$270

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 8/26

11:03 am-6:19 am

1 stop17h 16m

Chicago O'Hare Intl

Sat 8/29

9:48 pm-9:48 am

1 stop14h 00m

$274

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 6/2

7:50 pm-8:32 pm

1 stop22h 42m

Chicago O'Hare Intl

Fri 6/5

9:37 pm-10:06 am

1 stop14h 29m

$276

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 6/8

8:20 pm-5:07 am

1 stop30h 47m

Chicago O'Hare Intl

Fri 6/19

9:48 pm-9:48 am

1 stop14h 00m

$278

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 6/26

7:41 pm-8:43 pm

1 stop23h 02m

Chicago O'Hare Intl

Mon 6/29

7:20 am-10:35 am

1 stop29h 15m

$279

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 9/16

9:16 pm-11:57 am

1 stop12h 41m

Chicago O'Hare Intl

Sat 9/26

10:40 pm-9:51 am

1 stop13h 11m

$280

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 6/16

2:20 pm-5:07 am

1 stop12h 47m

Chicago O'Hare Intl

Tue 6/23

7:20 am-10:35 am

1 stop29h 15m

$282
Quickest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 8/11

8:12 pm-5:28 am

1 stop7h 16m

Chicago O'Hare Intl

Tue 8/18

5:42 pm-8:21 pm

Nonstop4h 39m

$283

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 6/16

2:20 pm-5:07 am

1 stop12h 47m

Chicago O'Hare Intl

Tue 6/23

7:20 am-10:35 am

1 stop29h 15m

$284

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 Wednesday when prices can be found for as low as $404. 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 $500.

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 $330 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $448. 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 $315 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 $263 on momondo.

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

You could potentially save up to 50% 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 May 2026, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 51% 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

$198

Fastest flight time

3h 57m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Seattle in the past 72 hours is $198. 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 57m
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 57m.

  • 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 $108Free CancellationRating
7.9
8,453 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $121Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $166Free CancellationRating
7.4
9,730 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $174Free CancellationRating
7.9
12,376 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $177Free CancellationRating
7.1
11,659 reviews
Search American Airlines flights
FrontierPriceFrom $193Free CancellationRating
5.6
2,949 reviews
Search Frontier flights

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

    Delta flies from Seattle to Chicago O'Hare Intl Airport around 18 times per week, with 8,453 momondo users rating the airline 7.9/10. The cheapest Delta deal from Seattle to Chicago O'Hare Intl Airport in the last 72 hours was $108 (round-trip), much lower than the average airfare cost of $316 for Delta flights on this route.

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

    Across 12,376 Alaska Airlines reviews on momondo, the average score is 7.9/10. Alaska Airlines flies from Seattle to Chicago O'Hare Intl Airport about 24 times each week, with ticket deals ranging from $174 to $326. 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
Rosemont
Naperville
Orland Park
New Buffalo
Oak Brook
Kenosha
Joliet
Aurora
Racine
Janesville
Hammond
Evanston
Elgin
Tinley Park

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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