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Cheap flights from Seattle to Chicago from $103

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 4/23. 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
7:50 pm - 8:37 pm
SEA
-
ORD
22h 47m
1 stop
Frontier Logo
9:42 pm - 9:49 am
ORD
-
SEA
14h 07m
1 stop
$207Frontier
Fri, May 8 - Wed, May 13
Frontier Logo
7:12 pm - 5:00 pm
SEA
-
ORD
19h 48m
2 stops
Frontier Logo
8:58 pm - 7:51 pm
ORD
-
SEA
24h 53m
1 stop
$211Frontier
Thu, Apr 16 - Wed, Apr 22
Frontier Logo
10:57 am - 5:50 am
SEA
-
ORD
16h 53m
1 stop
Frontier Logo
7:50 am - 9:27 am
ORD
-
SEA
27h 37m
2 stops
$212Frontier
Thu, Apr 16 - Mon, Apr 27
Multiple Airlines Logo
10:57 am - 5:50 am
SEA
-
ORD
16h 53m
1 stop
Multiple Airlines Logo
6:00 am - 8:37 am
ORD
-
SEA
4h 37mnonstop
$213Multiple Airlines
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
10:57 am - 5:50 am
SEA
-
ORD
16h 53m
1 stop
Frontier Logo
4:28 pm - 9:49 am
ORD
-
SEA
19h 21m
2 stops
$214Frontier
Wed, Apr 29 - Mon, May 4
Frontier Logo
11:06 am - 6:39 am
SEA
-
ORD
17h 33m
1 stop
Frontier Logo
9:42 pm - 9:49 am
ORD
-
SEA
14h 07m
1 stop
$216Frontier
Thu, May 7 - Sun, May 10
Frontier Logo
10:57 am - 5:50 am
SEA
-
ORD
16h 53m
1 stop
Frontier Logo
3:27 pm - 9:27 am
ORD
-
SEA
20h 00m
2 stops
$217Frontier
Thu, Apr 16 - Wed, Apr 22
Frontier Logo
10:57 am - 5:50 am
SEA
-
ORD
16h 53m
1 stop
Frontier Logo
3:27 pm - 9:27 am
ORD
-
SEA
20h 00m
2 stops
$218Frontier
Thu, Apr 16 - Wed, Apr 22
Multiple Airlines Logo
10:57 am - 5:35 am
SEA
-
ORD
16h 38m
1 stop
Multiple Airlines Logo
4:28 pm - 5:42 pm
ORD
-
SEA
27h 14m
2 stops
$219Multiple Airlines
Sat, Apr 18 - Mon, Apr 27
Frontier Logo
10:57 am - 6:20 am
SEA
-
ORD
17h 23m
1 stop
Frontier Logo
9:42 pm - 9:49 am
ORD
-
SEA
14h 07m
1 stop
$221Frontier
Thu, Apr 30 - Tue, May 5

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
May 8
SEA7:50 pmSeattle/Tacoma Intl
22h 47m
1 stop
ORD8:37 pmChicago O'Hare Intl
May 13
ORD9:42 pmChicago O'Hare Intl
14h 07m
1 stop
SEA9:49 amSeattle/Tacoma Intl
$207
Frontier
Apr 16
SEA7:12 pmSeattle/Tacoma Intl
19h 48m
2 stops
ORD5:00 pmChicago O'Hare Intl
Apr 22
ORD8:58 pmChicago O'Hare Intl
24h 53m
1 stop
SEA7:51 pmSeattle/Tacoma Intl
$211
Frontier
Apr 16
SEA10:57 amSeattle/Tacoma Intl
16h 53m
1 stop
ORD5:50 amChicago O'Hare Intl
Apr 27
ORD7:50 amChicago O'Hare Intl
27h 37m
2 stops
SEA9:27 amSeattle/Tacoma Intl
$212

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
Apr 21
SEA11:33 pmSeattle/Tacoma Intl
4h 06m
ORD5:39 amChicago O'Hare Intl
Apr 28
ORD10:00 pmChicago O'Hare Intl
4h 36m
SEA12:36 amSeattle/Tacoma Intl
$226
American Airlines
May 23
SEA3:06 pmSeattle/Tacoma Intl
4h 34m
ORD9:40 pmChicago O'Hare Intl
May 26
ORD6:55 amChicago O'Hare Intl
4h 32m
SEA9:27 amSeattle/Tacoma Intl
$249
American Airlines
Apr 25
SEA11:33 pmSeattle/Tacoma Intl
4h 06m
ORD5:39 amChicago O'Hare Intl
May 2
ORD7:30 amChicago O'Hare Intl
4h 44m
SEA10:14 amSeattle/Tacoma Intl
$254

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 March 29, 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 5/8

7:50 pm-8:37 pm

1 stop22h 47m

Chicago O'Hare Intl

Wed 5/13

9:42 pm-9:49 am

1 stop14h 07m

$207

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/16

7:12 pm-5:00 pm

2 stops19h 48m

Chicago O'Hare Intl

Wed 4/22

8:58 pm-7:51 pm

1 stop24h 53m

$211

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/16

10:57 am-5:50 am

1 stop16h 53m

Chicago O'Hare Intl

Mon 4/27

7:50 am-9:27 am

2 stops27h 37m

$212
Quickest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 4/15

10:57 am-5:50 am

1 stop16h 53m

Chicago O'Hare Intl

Sat 4/18

6:00 am-8:37 am

Nonstop4h 37m

$213

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 4/29

10:57 am-5:50 am

1 stop16h 53m

Chicago O'Hare Intl

Mon 5/4

4:28 pm-9:49 am

2 stops19h 21m

$214

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 5/7

11:06 am-6:39 am

1 stop17h 33m

Chicago O'Hare Intl

Sun 5/10

9:42 pm-9:49 am

1 stop14h 07m

$216

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/16

10:57 am-5:50 am

1 stop16h 53m

Chicago O'Hare Intl

Wed 4/22

3:27 pm-9:27 am

2 stops20h 00m

$217

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/16

10:57 am-5:50 am

1 stop16h 53m

Chicago O'Hare Intl

Wed 4/22

3:27 pm-9:27 am

2 stops20h 00m

$218

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 4/18

10:57 am-5:35 am

1 stop16h 38m

Chicago O'Hare Intl

Mon 4/27

4:28 pm-5:42 pm

2 stops27h 14m

$219

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/30

10:57 am-6:20 am

1 stop17h 23m

Chicago O'Hare Intl

Tue 5/5

9:42 pm-9:49 am

1 stop14h 07m

$221

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 $388. 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 $485.

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 $293 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around $440. 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 $301 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 $258 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?

You could potentially save up to 25% 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 March 2026, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 29% 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

$188

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 $188. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $343.
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

  • 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
Hawaiian AirlinesPriceFrom $84Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $106Free CancellationRating
7.9
8,359 reviews
Search Delta flights
FrontierPriceFrom $162Free CancellationRating
5.7
3,009 reviews
Search Frontier flights
United AirlinesPriceFrom $163Free CancellationRating
7.4
9,510 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $169Free CancellationRating
7.9
12,137 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $177Free CancellationRating
7.1
11,522 reviews
Search American Airlines flights

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

    Delta flies from Seattle to Chicago O'Hare Intl Airport around 6 times per week, with 8,359 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 $106 (round-trip), much lower than the average airfare cost of $287 for Delta flights on this route.

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

    Across 12,137 Alaska Airlines reviews on momondo, the average score is 7.9/10. Alaska Airlines flies from Seattle to Chicago O'Hare Intl Airport about 6 times each week, with ticket deals ranging from $169 to $314. 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
New Buffalo
Orland Park
Kenosha
Oak Brook
Joliet
Janesville
Racine
Hammond
Aurora
Elgin
Tinley Park
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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