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Cheap flights from Seattle to Chicago from $89

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 5/5. 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
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:42 pm - 1:19 pm
SEA
-
ORD
22h 37m
1 stop
Frontier Logo
10:55 am - 9:27 am
ORD
-
SEA
24h 32m
1 stop
$177Frontier
Sun, Apr 12 - Fri, Apr 17
Southwest Logo
11:55 pm - 5:55 am
SEA
-
MDW
4h 00mnonstop
Southwest Logo
9:35 pm - 12:05 am
MDW
-
SEA
4h 30mnonstop
$177Southwest
Sat, Apr 18 - Mon, Apr 20
Frontier Logo
12:42 pm - 1:19 pm
SEA
-
ORD
22h 37m
1 stop
Frontier Logo
8:25 am - 9:27 am
ORD
-
SEA
27h 02m
2 stops
$178Frontier
Sun, Apr 12 - Tue, Apr 14
Alaska Airlines Logo
5:55 pm - 11:56 pm
SEA
-
ORD
4h 01mnonstop
Alaska Airlines Logo
7:00 am - 9:51 am
ORD
-
SEA
4h 51mnonstop
$180Alaska Airlines
Sat, Mar 7 - Wed, Mar 11
Delta Logo
5:55 pm - 11:52 pm
SEA
-
ORD
3h 57mnonstop
Delta Logo
7:25 am - 10:05 am
ORD
-
SEA
4h 40mnonstop
$185Delta
Mon, Apr 6 - Sat, Apr 11
Hawaiian Airlines Logo
6:00 am - 12:01 pm
SEA
-
ORD
4h 01mnonstop
Hawaiian Airlines Logo
7:00 am - 9:51 am
ORD
-
SEA
4h 51mnonstop
$186Hawaiian Airlines
Mon, Mar 9 - Tue, Mar 17
Hawaiian Airlines Logo
6:00 am - 12:01 pm
SEA
-
ORD
4h 01mnonstop
Hawaiian Airlines Logo
7:00 am - 9:51 am
ORD
-
SEA
4h 51mnonstop
$187Hawaiian Airlines
Mon, Mar 9 - Tue, Mar 17
Multiple Airlines Logo
12:35 am - 6:39 am
SEA
-
ORD
4h 04mnonstop
Multiple Airlines Logo
10:55 am - 9:27 am
ORD
-
SEA
24h 32m
1 stop
$188Multiple Airlines
Thu, Apr 16 - Mon, Apr 20
Alaska Airlines Logo
5:55 pm - 11:56 pm
SEA
-
ORD
4h 01mnonstop
Alaska Airlines Logo
3:07 pm - 10:39 pm
ORD
-
SEA
9h 32m
1 stop
$190Alaska Airlines
Sat, Mar 7 - Tue, Mar 10
Multiple Airlines Logo
9:06 pm - 11:13 am
SEA
-
RFD
12h 07m
1 stop
Multiple Airlines Logo
9:41 pm - 9:03 pm
RFD
-
SEA
25h 22m
1 stop
$413Multiple Airlines
Fri, Mar 6 - Mon, Mar 9

Frontier flights from Seattle to Chicago

Our best Frontier deals on Seattle to Chicago flight tickets
Frontier
Apr 12
SEA12:42 pmSeattle/Tacoma Intl
22h 37m
1 stop
ORD1:19 pmChicago O'Hare Intl
Apr 17
ORD10:55 amChicago O'Hare Intl
24h 32m
1 stop
SEA9:27 amSeattle/Tacoma Intl
$177
Frontier
Apr 12
SEA12:42 pmSeattle/Tacoma Intl
22h 37m
1 stop
ORD1:19 pmChicago O'Hare Intl
Apr 14
ORD8:25 amChicago O'Hare Intl
27h 02m
2 stops
SEA9:27 amSeattle/Tacoma Intl
$178
Frontier
Mar 7
SEA5:31 pmSeattle/Tacoma Intl
9h 18m
1 stop
ORD4:49 amChicago O'Hare Intl
Mar 10
ORD7:31 pmChicago O'Hare Intl
23h 38m
1 stop
SEA5:09 pmSeattle/Tacoma Intl
$184

American Airlines flights from Seattle to Chicago

Our best American Airlines deals on Seattle to Chicago flight tickets
American Airlines
Mar 7
SEA12:07 amSeattle/Tacoma Intl
4h 16m
ORD7:23 amChicago O'Hare Intl
Mar 14
ORD9:40 pmChicago O'Hare Intl
4h 44m
SEA12:24 amSeattle/Tacoma Intl
$192
American Airlines
Mar 6
SEA12:07 amSeattle/Tacoma Intl
4h 16m
ORD6:23 amChicago O'Hare Intl
Mar 14
ORD9:40 pmChicago O'Hare Intl
4h 44m
SEA12:24 amSeattle/Tacoma Intl
$198
American Airlines
Mar 12
SEA12:13 amSeattle/Tacoma Intl
4h 16m
ORD6:29 amChicago O'Hare Intl
Mar 18
ORD8:20 pmChicago O'Hare Intl
4h 44m
SEA11:04 pmSeattle/Tacoma Intl
$225

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Chicago 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 February 11, 2026.
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 4/12

12:42 pm-1:19 pm

1 stop22h 37m

Chicago O'Hare Intl

Fri 4/17

10:55 am-9:27 am

1 stop24h 32m

$177

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 4/18

11:55 pm-5:55 am

Nonstop4h 00m

Chicago Midway

Mon 4/20

9:35 pm-12:05 am

Nonstop4h 30m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 4/12

12:42 pm-1:19 pm

1 stop22h 37m

Chicago O'Hare Intl

Tue 4/14

8:25 am-9:27 am

2 stops27h 02m

$178

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 3/7

5:55 pm-11:56 pm

Nonstop4h 01m

Chicago O'Hare Intl

Wed 3/11

7:00 am-9:51 am

Nonstop4h 51m

$180

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 4/6

5:55 pm-11:52 pm

Nonstop3h 57m

Chicago O'Hare Intl

Sat 4/11

7:25 am-10:05 am

Nonstop4h 40m

$185

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 3/9

6:00 am-12:01 pm

Nonstop4h 01m

Chicago O'Hare Intl

Tue 3/17

7:00 am-9:51 am

Nonstop4h 51m

$186

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 3/9

6:00 am-12:01 pm

Nonstop4h 01m

Chicago O'Hare Intl

Tue 3/17

7:00 am-9:51 am

Nonstop4h 51m

$187

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/16

12:35 am-6:39 am

Nonstop4h 04m

Chicago O'Hare Intl

Mon 4/20

10:55 am-9:27 am

1 stop24h 32m

$188

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 3/7

5:55 pm-11:56 pm

Nonstop4h 01m

Chicago O'Hare Intl

Tue 3/10

3:07 pm-10:39 pm

1 stop9h 32m

$190

SeattleChicago

SEA - RFD

SEARFD

Seattle/Tacoma Intl

Fri 3/6

9:06 pm-11:13 am

1 stop12h 07m

Chicago Greater Rockford

Mon 3/9

9:41 pm-9:03 pm

1 stop25h 22m

$413

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

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?

The month of February is, on average, the cheapest month to fly to Chicago from Seattle, with most prices found around $245. If you’re not able to fly to Chicago in February, then January is your next best option. Flight prices from Seattle to Chicago during January average around $267.

What is the cheapest day to depart on your flight to Chicago?

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as $387. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Chicago for around $487.

What is the cheapest time of day to depart on your flight to Chicago?

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Seattle to Chicago during this time can be as low as $290. In contrast, the most expensive time of day to depart to Chicago is in the morning when prices are around $439.

What is the cheapest Seattle/Tacoma Intl to Chicago flight route?

Fly from Seattle/Tacoma Intl to Chicago Midway for the best Seattle/Tacoma Intl - Chicago flight prices

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $296 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Seattle for as low as $253 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Chicago flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Chicago 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 flight prices changed over time?

As of February 2026, prices for Seattle to Chicago flights are approximately 63% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Chicago according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Chicago (SEA to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Chicago

Best Price Found

$158

Fastest flight time

3h 55m

Direct flights

Every day

Airports in Chicago

3 airports
The best one-way flight to Chicago from Seattle in the past 72 hours is $158. The best round-trip flight deal from Seattle to Chicago found on momondo in the last 72 hours is $294.
The fastest flight from Seattle to Chicago takes 3h 55m
Direct flights go from Seattle to Chicago every day.
There are 3 airports in Chicago. From Seattle there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).
Search flight deals

  • How far is Seattle/Tacoma Intl to Chicago by plane?

    Chicago is 1732.3 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 3h 55m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Chicago?

    Prices for flights from Seattle/Tacoma Intl Airport to Chicago refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Chicago?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Chicago?

  • What is the most popular airline from Seattle to Chicago?

Best airlines flying from Seattle to Chicago

Compare and see reviews for airlines that fly from Seattle to Chicago with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $97Free CancellationRating
7.9
8,180 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $114Free CancellationRating
7.8
2,832 reviews
Search Hawaiian Airlines flights
FrontierPriceFrom $137Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
United AirlinesPriceFrom $157Free CancellationRating
7.4
9,273 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $169Free CancellationRating
8.0
11,874 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $177Free CancellationRating
7.2
11,266 reviews
Search American Airlines flights
SouthwestPriceFrom $184Free CancellationRating
8.0
4,280 reviews
Search Southwest flights

  • Alaska Airlines Flights From Seattle to Chicago

    Alaska Airlines flies from Seattle to Chicago around 12 times per week, with 11,874 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Seattle to Chicago in the last 72 hours was $169 (round-trip), much lower than the average airfare cost of $309 for Alaska Airlines flights on this route.

  • Southwest Flights From Seattle to Chicago

    $184 is the best Southwest flight deal from Seattle to Chicago found on momondo over the last 72 hours. The average Southwest ticket price found was closer to $354, however, with flight time and availability significantly affecting the price. Southwest (8.0/10 from 4,280 user reviews) flies into Chicago from Seattle 5 times in an average week so prices can vary.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Portage
Lansing
Schererville
Valparaiso
Munster
Crown Point
Chesterton
Monticello
Porter
Griffith
Saint John

Why use momondo?

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

Finding the right flight to Chicago from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.

Can I find flights from Seattle to Chicago with flexible booking policies on momondo?

momondo does allow users to show only those flights to Chicago from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Chicago?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Chicago.

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.

An easier way to manage your Chicago trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport