What airlines fly to Chicago?

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Chicago from Seattle according to our data. Alaska Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 7 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

How many flights depart from Seattle to Chicago on average per day?

37 flights are operational daily from Seattle to Chicago as of February 2026. The most popular departure time for this route is 8:00AM, with 75% of flights per day taking off at noon.

How many flights depart from Seattle to Chicago on average per week?

As of February 2026, 264 flights take off from Seattle and land in Chicago each week. The most common flight departure day for this route is Fri, with 19% of weekly flights taking off on this day.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Chicago?

Frontier, Alaska Airlines, and Southwest are the most popular carriers operating from Seattle/Tacoma Intl to Chicago

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?

As of February 2026, there are 7 operators available to choose from 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.

$89 Cheap Flights from Seattle to Chicago in 2026

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Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

4:20 pm - 9:50 am

SEA

ORD

15h 30m

1 stop

6:20 am - 5:42 pm

ORD

SEA

13h 22m

1 stop

$174Multiple Airlines

Thu, Apr 16 - Tue, Apr 21

11:59 pm - 5:56 am

SEA

ORD

3h 57mnonstop

4:06 pm - 6:46 pm

ORD

SEA

4h 40mnonstop

$175United Airlines

Wed, Mar 25 - Sat, Apr 4

12:24 pm - 12:57 am

SEA

ORD

10h 33m

1 stop

8:55 pm - 9:03 pm

ORD

SEA

26h 08m

2 stops

$176Frontier

Fri, Mar 6 - Mon, Mar 9

12:24 pm - 12:57 am

SEA

ORD

10h 33m

1 stop

8:55 pm - 5:09 pm

ORD

SEA

22h 14m

2 stops

$177Multiple Airlines

Fri, Mar 6 - Tue, Mar 10

6:00 am - 12:19 pm

SEA

ORD

4h 19mnonstop

6:55 am - 9:27 am

ORD

SEA

4h 32mnonstop

$178American Airlines

Sat, May 30 - Sun, Jun 7

7:00 am - 1:17 pm

SEA

ORD

4h 17mnonstop

7:30 am - 10:14 am

ORD

SEA

4h 44mnonstop

$180American Airlines

Fri, May 15 - Mon, May 18

11:58 pm - 6:12 am

SEA

ORD

4h 14mnonstop

6:55 am - 9:27 am

ORD

SEA

4h 32mnonstop

$181American Airlines

Wed, Jun 24 - Sun, Jun 28

12:24 pm - 12:57 am

SEA

ORD

10h 33m

1 stop

7:39 pm - 5:09 pm

ORD

SEA

23h 30m

1 stop

$182Frontier

Fri, Mar 6 - Mon, Mar 9

6:55 pm - 5:40 am

SEA

MDW

8h 45m

1 stop

6:15 am - 5:55 pm

MDW

SEA

13h 40m

1 stop

$183Southwest

Sat, Apr 18 - Sat, Apr 25

7:05 am - 1:10 pm

SEA

MDW

4h 05mnonstop

9:40 pm - 12:15 am

MDW

SEA

4h 35mnonstop

$203Southwest

Sat, Feb 28 - Sat, Mar 7

Frontier flights from Seattle to Chicago

Our best Frontier deals on Seattle to Chicago flight tickets

Frontier

Mar 6

SEA12:24 pmSeattle/Tacoma Intl

10h 33m

1 stop

ORD12:57 amChicago O'Hare Intl

Mar 9

ORD8:55 pmChicago O'Hare Intl

26h 08m

2 stops

SEA9:03 pmSeattle/Tacoma Intl

$176

Frontier

Mar 6

SEA12:24 pmSeattle/Tacoma Intl

10h 33m

1 stop

ORD12:57 amChicago O'Hare Intl

Mar 9

ORD7:39 pmChicago O'Hare Intl

23h 30m

1 stop

SEA5:09 pmSeattle/Tacoma Intl

$182

Frontier

Mar 9

SEA12:24 pmSeattle/Tacoma Intl

10h 33m

1 stop

ORD12:57 amChicago O'Hare Intl

Mar 11

ORD7:39 pmChicago O'Hare Intl

23h 30m

1 stop

SEA5:09 pmSeattle/Tacoma Intl

$183

United Airlines flights from Seattle to Chicago

Our best United Airlines deals on Seattle to Chicago flight tickets

United Airlines

Mar 25

SEA11:59 pmSeattle/Tacoma Intl

3h 57m

ORD5:56 amChicago O'Hare Intl

Apr 4

ORD4:06 pmChicago O'Hare Intl

4h 40m

SEA6:46 pmSeattle/Tacoma Intl

$175

United Airlines

Mar 25

SEA3:30 pmSeattle/Tacoma Intl

6h 22m

1 stop

ORD11:52 pmChicago O'Hare Intl

Apr 4

ORD4:06 pmChicago O'Hare Intl

4h 40m

SEA6:46 pmSeattle/Tacoma Intl

$185

United Airlines

Feb 28

SEA12:55 pmSeattle/Tacoma Intl

6h 34m

1 stop

ORD9:29 pmChicago O'Hare Intl

Mar 7

ORD4:20 pmChicago O'Hare Intl

4h 43m

SEA7:03 pmSeattle/Tacoma Intl

$213

Fly from

Fly to

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/16

4:20 pm-9:50 am

1 stop15h 30m

Chicago O'Hare Intl

Tue 4/21

6:20 am-5:42 pm

1 stop13h 22m

$174

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 3/25

11:59 pm-5:56 am

Nonstop3h 57m

Chicago O'Hare Intl

Sat 4/4

4:06 pm-6:46 pm

Nonstop4h 40m

$175

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 3/6

12:24 pm-12:57 am

1 stop10h 33m

Chicago O'Hare Intl

Mon 3/9

8:55 pm-9:03 pm

2 stops26h 08m

$176

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 3/6

12:24 pm-12:57 am

1 stop10h 33m

Chicago O'Hare Intl

Tue 3/10

8:55 pm-5:09 pm

2 stops22h 14m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 5/30

6:00 am-12:19 pm

Nonstop4h 19m

Chicago O'Hare Intl

Sun 6/7

6:55 am-9:27 am

Nonstop4h 32m

$178

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 5/15

7:00 am-1:17 pm

Nonstop4h 17m

Chicago O'Hare Intl

Mon 5/18

7:30 am-10:14 am

Nonstop4h 44m

$180

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 6/24

11:58 pm-6:12 am

Nonstop4h 14m

Chicago O'Hare Intl

Sun 6/28

6:55 am-9:27 am

Nonstop4h 32m

$181

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 3/6

12:24 pm-12:57 am

1 stop10h 33m

Chicago O'Hare Intl

Mon 3/9

7:39 pm-5:09 pm

1 stop23h 30m

$182

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 4/18

6:55 pm-5:40 am

1 stop8h 45m

Chicago Midway

Sat 4/25

6:15 am-5:55 pm

1 stop13h 40m

$183

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 2/28

7:05 am-1:10 pm

Nonstop4h 05m

Chicago Midway

Sat 3/7

9:40 pm-12:15 am

Nonstop4h 35m

$203

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $247. 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 $254 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?
As of February 2026, there are 7 operators available to choose from 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?
Based on momondo bookings for flights between Seattle and Chicago, the leading plane model is Boeing 737-800, making up 23.92% of the total bookings. Other popular models include Airbus A321neo with 18.84%, Boeing 737-800 Passenger/BBJ2 (winglets) with 14.88%, and Boeing 737 MAX 8 with 9.01%.
What is the most popular airline from Seattle to Chicago?
momondo data reveals that the most frequently booked airline on the route from Seattle to Chicago is Alaska Airlines, representing 34% of all bookings. The subsequent popular airlines are Delta at 22%, United Airlines at 17%, and American Airlines at 17%.

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
Delta	PriceFrom $97	Free Cancellation	Rating 7.9 8,206 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $114	Free Cancellation	Rating 7.8 2,833 reviews	Search Hawaiian Airlines flights
Frontier	PriceFrom $137	Free Cancellation	Rating 5.7 3,047 reviews	Search Frontier flights
United Airlines	PriceFrom $157	Free Cancellation	Rating 7.4 9,300 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $169	Free Cancellation	Rating 8.0 11,884 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $177	Free Cancellation	Rating 7.2 11,291 reviews	Search American Airlines flights
Southwest	PriceFrom $184	Free Cancellation	Rating 8.0 4,285 reviews	Search Southwest flights

Alaska Airlines Flights From Seattle to Chicago
Alaska Airlines flies from Seattle to Chicago around 21 times per week, with 11,884 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 4,285 user reviews) flies into Chicago from Seattle 6 times in an average week so prices can vary.

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.

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Fly into one of these airports located in Chicago

Chicago Midway Airport

Chicago O'Hare Intl Airport

Chicago Greater Rockford Airport

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 3/29. 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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Frontier flights from Seattle to Chicago

Our best Frontier deals on Seattle to Chicago flight tickets

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Our best United Airlines deals on Seattle to Chicago flight tickets

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How to get the cheapest flight ticket from Seattle to Chicago

What is the cheapest month to fly to Chicago?

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

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

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

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

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

How have Seattle to Chicago flight prices changed over time?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Chicago?

What airlines fly to Chicago?

How many flights depart from Seattle to Chicago on average per day?

How many flights depart from Seattle to Chicago on average per week?

When to book flights from Seattle to Chicago

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

Fastest flight time

Direct flights

Airports in Chicago

Best airlines flying from Seattle to Chicago

Compare and see reviews for airlines that fly from Seattle to Chicago with momondo

Alaska Airlines Flights From Seattle to Chicago

Southwest Flights From Seattle to Chicago

Traveling to a place near Chicago?

Why use momondo?

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

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

How can momondo help me find flights 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?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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

Fly your favorite airline to Chicago

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Chicago

List of cabin classes available on flights landing in Chicago. Availability may vary depending on flight origin and airline.

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