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

As of August 2025, 367 flights take off from Seattle and land in Chicago each week. The most common flight departure day for this route is Sun, with 23% of weekly flights taking off on this day.

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

52 flights are operational daily from Seattle to Chicago as of August 2025. The most popular departure time for this route is 1:00PM, with 50% of flights per day taking off at noon.

What airlines fly to Chicago?

Alaska Airlines, Delta and United 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 33% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 8 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

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

Alaska Airlines, Southwest, and American Airlines 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 August 2025, there are 8 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.

$95 Cheap Flights from Seattle to Chicago in 2025

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Find the cheapest flights from Seattle to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:00 am - 9:28 pmSEA-ORD

12h 28m1 stop

6:20 am - 8:52 amORD-SEA

4h 32mnonstop

$186

Find Deal

Tue, Sep 9 - Tue, Sep 23

12:59 am - 7:03 amSEA-ORD

4h 04mnonstop

8:20 am - 3:08 pmORD-SEA

8h 48m1 stop

$187Hawaiian Airlines

Find Deal

Mon, Sep 29 - Tue, Oct 7

4:55 pm - 10:55 pmSEA-ORD

4h 00mnonstop

7:10 am - 9:43 amORD-SEA

4h 33mnonstop

$189United Airlines

Find Deal

Wed, Sep 10 - Wed, Sep 17

11:10 pm - 5:15 amSEA-MDW

4h 05mnonstop

5:25 pm - 7:55 pmMDW-SEA

4h 30mnonstop

$189Southwest

Find Deal

Sat, Sep 13 - Sat, Sep 20

2:31 pm - 12:59 amSEA-ORD

8h 28m1 stop

6:50 am - 12:07 pmORD-SEA

7h 17m1 stop

$191Frontier

Find Deal

Fri, Oct 10 - Mon, Oct 13

5:55 pm - 12:03 amSEA-ORD

4h 08mnonstop

2:07 pm - 6:45 pmORD-SEA

6h 38m1 stop

$193Alaska Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

1:02 pm - 11:53 pmSEA-ORD

8h 51m1 stop

7:15 am - 12:07 pmORD-SEA

6h 52m1 stop

$194Frontier

Find Deal

Tue, Oct 7 - Tue, Oct 14

5:55 pm - 12:03 amSEA-ORD

4h 08mnonstop

2:07 pm - 8:35 pmORD-SEA

8h 28m1 stop

$199Alaska Airlines

Find Deal

Tue, Sep 23 - Tue, Sep 30

10:45 pm - 9:00 amSEA-MDW

8h 15m1 stop

9:05 pm - 11:35 pmMDW-SEA

4h 30mnonstop

$199Southwest

Find Deal

Tue, Sep 9 - Tue, Sep 23

11:54 pm - 5:55 amSEA-ORD

4h 01mnonstop

4:10 pm - 10:15 pmORD-SEA

8h 05m1 stop

$215United Airlines

Find Deal

Sat, Aug 30 - Sat, Sep 6

Frontier flights from Seattle to Chicago

Our best Frontier deals on Seattle to Chicago flight tickets

Frontier

Oct 10

SEA2:31 pmSeattle/Tacoma Intl

8h 28m

1 stop

ORD12:59 amChicago O'Hare Intl

Oct 13

ORD6:50 amChicago O'Hare Intl

7h 17m

1 stop

SEA12:07 pmSeattle/Tacoma Intl

$191

Find similar

Frontier

Oct 7

SEA1:02 pmSeattle/Tacoma Intl

8h 51m

1 stop

ORD11:53 pmChicago O'Hare Intl

Oct 14

ORD7:15 amChicago O'Hare Intl

6h 52m

1 stop

SEA12:07 pmSeattle/Tacoma Intl

$194

Find similar

Frontier

Nov 13

SEA12:58 pmSeattle/Tacoma Intl

19h 04m

2 stops

ORD10:02 amChicago O'Hare Intl

Nov 16

ORD6:00 amChicago O'Hare Intl

8h 13m

1 stop

SEA12:13 pmSeattle/Tacoma Intl

$195

Find similar

United Airlines flights from Seattle to Chicago

Our best United Airlines deals on Seattle to Chicago flight tickets

United Airlines

Sep 10

SEA4:55 pmSeattle/Tacoma Intl

4h 00m

ORD10:55 pmChicago O'Hare Intl

Sep 17

ORD7:10 amChicago O'Hare Intl

4h 33m

SEA9:43 amSeattle/Tacoma Intl

$189

Find similar

United Airlines

Aug 30

SEA11:54 pmSeattle/Tacoma Intl

4h 01m

ORD5:55 amChicago O'Hare Intl

Sep 6

ORD4:10 pmChicago O'Hare Intl

8h 05m

1 stop

SEA10:15 pmSeattle/Tacoma Intl

$215

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 9/9

7:00 am-9:28 pm

1 stop12h 28m

Chicago O'Hare Intl

Tue 9/23

6:20 am-8:52 am

Nonstop4h 32m

$186

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 9/29

12:59 am-7:03 am

Nonstop4h 04m

Chicago O'Hare Intl

Tue 10/7

8:20 am-3:08 pm

1 stop8h 48m

$187

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 9/10

4:55 pm-10:55 pm

Nonstop4h 00m

Chicago O'Hare Intl

Wed 9/17

7:10 am-9:43 am

Nonstop4h 33m

$189

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 9/13

11:10 pm-5:15 am

Nonstop4h 05m

Chicago Midway

Sat 9/20

5:25 pm-7:55 pm

Nonstop4h 30m

$189

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 10/10

2:31 pm-12:59 am

1 stop8h 28m

Chicago O'Hare Intl

Mon 10/13

6:50 am-12:07 pm

1 stop7h 17m

$191

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 9/13

5:55 pm-12:03 am

Nonstop4h 08m

Chicago O'Hare Intl

Sat 9/20

2:07 pm-6:45 pm

1 stop6h 38m

$193

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/7

1:02 pm-11:53 pm

1 stop8h 51m

Chicago O'Hare Intl

Tue 10/14

7:15 am-12:07 pm

1 stop6h 52m

$194

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 9/23

5:55 pm-12:03 am

Nonstop4h 08m

Chicago O'Hare Intl

Tue 9/30

2:07 pm-8:35 pm

1 stop8h 28m

$199

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Tue 9/9

10:45 pm-9:00 am

1 stop8h 15m

Chicago Midway

Tue 9/23

9:05 pm-11:35 pm

Nonstop4h 30m

$199

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 8/30

11:54 pm-5:55 am

Nonstop4h 01m

Chicago O'Hare Intl

Sat 9/6

4:10 pm-10:15 pm

1 stop8h 05m

$215

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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 January is, on average, the cheapest month to fly to Chicago from Seattle, with most prices found around $223. If you’re not able to fly to Chicago in January, then September is your next best option. Flight prices from Seattle to Chicago during September average around $249.

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 $394. 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 $503.

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 $288. In contrast, the most expensive time of day to depart to Chicago is in the morning when prices are around $458.

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

Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl 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 $304 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 $258 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 August 2025, prices for Seattle to Chicago flights are approximately 31% cheaper 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	$95
Fastest flight time	3h 55m
Direct flights	Every day
Airports in Chicago	2 airports

The best one-way flight to Chicago from Seattle in the past 72 hours is $95. The best round-trip flight deal from Seattle to Chicago found on momondo in the last 72 hours is $186.

The fastest flight from Seattle to Chicago takes 3h 55m

Direct flights go from Seattle to Chicago every day.

There are 2 airports near Chicago: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)

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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 August 2025, there are 8 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 737-900 Passenger/BBJ3 (winglets), making up 16.16% of the total bookings. Other popular models include Boeing 737-800 with 14.87%, Boeing 737 MAX 9 with 13.18%, and Boeing 737-800 Passenger/BBJ2 (winglets) with 9.94%.
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 35% of all bookings. The subsequent popular airlines are Delta at 26%, United Airlines at 17%, and American Airlines at 13%.

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
Spirit Airlines	PriceFrom $93	Free Cancellation	Rating 6.3 8,038 reviews	Search Spirit Airlines flights
Delta	PriceFrom $120	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $121	Free Cancellation	Rating 7.8 2,664 reviews	Search Hawaiian Airlines flights
Frontier	PriceFrom $137	Free Cancellation	Rating 5.8 3,212 reviews	Search Frontier flights
United Airlines	PriceFrom $164	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $169	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $169	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $170	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights

Delta Flights From Seattle to Chicago
Delta flies from Seattle to Chicago around 15 times per week, with 7,981 momondo users rating the airline 8.0/10. The cheapest Delta deal from Seattle to Chicago in the last 72 hours was $120 (round-trip), much lower than the average airfare cost of $285 for Delta flights on this route.
Alaska Airlines Flights From Seattle to Chicago
$169 is the best Alaska Airlines flight deal from Seattle to Chicago found on momondo over the last 72 hours. The average Alaska Airlines ticket price found was closer to $324, however, with flight time and availability significantly affecting the price. Alaska Airlines (8.0/10 from 10,000 user reviews) flies into Chicago from Seattle 15 times in an average week so prices can vary.

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Hammond

Benton Harbor

Saint Joseph

Lansing

Portage

Schererville

Valparaiso

Crown Point

Munster

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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Cheap flights from Seattle to Chicago from $95

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 10/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Price Alerts

Find the cheapest flights from Seattle to Chicago

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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Frontier flights from Seattle to Chicago

Our best Frontier deals on Seattle to Chicago flight tickets

United Airlines flights from Seattle to Chicago

Our best United Airlines deals on Seattle to Chicago flight tickets

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Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

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 January is, on average, the cheapest month to fly to Chicago from Seattle, with most prices found around $223. If you’re not able to fly to Chicago in January, then September is your next best option. Flight prices from Seattle to Chicago during September average around $249.

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?

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 $288. In contrast, the most expensive time of day to depart to Chicago is in the morning when prices are around $458.

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

Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl for the best Seattle/Tacoma Intl - Chicago flight prices

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

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 August 2025, prices for Seattle to Chicago flights are approximately 31% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to Chicago?

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

52 flights are operational daily from Seattle to Chicago as of August 2025. The most popular departure time for this route is 1:00PM, with 50% of flights per day taking off at noon.

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

As of August 2025, 367 flights take off from Seattle and land in Chicago each week. The most common flight departure day for this route is Sun, with 23% of weekly flights taking off on this day.

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

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

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

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?

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

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

Delta Flights From Seattle to Chicago

Alaska Airlines 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