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

64 flights are operational daily from Seattle to Chicago as of September 2025. The most popular departure time for this route is 10:00AM, with 50% of flights per day taking off at noon.

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

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

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

As of September 2025, 448 flights take off from Seattle and land in Chicago each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

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 32% 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.

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 September 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.

$93 Cheap Flights from Seattle to Chicago in 2025/26

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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

10:42 am - 12:30 amORD-SEA

15h 48m1 stop

$190Frontier

Find Deal

Sat, Sep 27 - Sun, Sep 28

1:02 pm - 11:53 pmSEA-ORD

8h 51m1 stop

5:59 pm - 8:35 pmORD-SEA

4h 36mnonstop

$191Multiple Airlines

Find Deal

Tue, Oct 7 - Sat, Oct 25

8:43 pm - 11:53 pmSEA-ORD

25h 10m1 stop

7:15 am - 12:07 pmORD-SEA

6h 52m1 stop

$192Frontier

Find Deal

Wed, Oct 15 - Wed, Oct 22

6:00 am - 12:03 pmSEA-ORD

4h 03mnonstop

6:00 am - 8:37 amORD-SEA

4h 37mnonstop

$194Alaska Airlines

Find Deal

Mon, Nov 24 - Tue, Nov 25

5:45 am - 11:45 amSEA-MDW

4h 00mnonstop

9:05 am - 11:40 amMDW-SEA

4h 35mnonstop

$194Southwest

Find Deal

Sat, Oct 25 - Fri, Oct 31

5:45 am - 11:45 amSEA-MDW

4h 00mnonstop

2:30 pm - 9:30 pmMDW-SEA

9h 00m1 stop

$204Southwest

Find Deal

Sat, Oct 25 - Fri, Oct 31

5:55 pm - 11:50 pmSEA-ORD

3h 55mnonstop

6:05 pm - 8:45 pmORD-SEA

4h 40mnonstop

$209Delta

Find Deal

Tue, Oct 14 - Wed, Oct 22

6:15 pm - 12:24 amSEA-ORD

4h 09mnonstop

2:05 pm - 6:48 pmORD-SEA

6h 43m1 stop

$211Alaska Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 7

7:00 am - 1:09 pmSEA-ORD

4h 09mnonstop

8:45 am - 11:28 amORD-SEA

4h 43mnonstop

$218United Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 7

11:15 pm - 8:40 amSEA-MDW

7h 25m1 stop

7:10 pm - 11:57 pmMDW-SEA

6h 47m1 stop

$261Delta

Find Deal

Wed, Oct 22 - Fri, Oct 24

Alaska Airlines flights from Seattle to Chicago

Our best Alaska Airlines deals on Seattle to Chicago flight tickets

Alaska Airlines

Nov 24

SEA6:00 amSeattle/Tacoma Intl

4h 03m

ORD12:03 pmChicago O'Hare Intl

Nov 25

ORD6:00 amChicago O'Hare Intl

4h 37m

SEA8:37 amSeattle/Tacoma Intl

$194

Find similar

Alaska Airlines

Oct 31

SEA6:15 pmSeattle/Tacoma Intl

4h 09m

ORD12:24 amChicago O'Hare Intl

Nov 7

ORD2:05 pmChicago O'Hare Intl

6h 43m

1 stop

SEA6:48 pmSeattle/Tacoma Intl

$211

Find similar

Alaska Airlines

Nov 24

SEA6:00 amSeattle/Tacoma Intl

4h 03m

ORD12:03 pmChicago O'Hare Intl

Nov 25

ORD7:00 amChicago O'Hare Intl

9h 26m

1 stop

SEA2:26 pmSeattle/Tacoma Intl

$215

Find similar

Delta flights from Seattle to Chicago

Our best Delta deals on Seattle to Chicago flight tickets

Delta

Oct 14

SEA5:55 pmSeattle/Tacoma Intl

3h 55m

ORD11:50 pmChicago O'Hare Intl

Oct 22

ORD6:05 pmChicago O'Hare Intl

4h 40m

SEA8:45 pmSeattle/Tacoma Intl

$209

Find similar

Delta

Oct 22

SEA11:15 pmSeattle/Tacoma Intl

7h 25m

1 stop

MDW8:40 amChicago Midway

Oct 24

MDW7:10 pmChicago Midway

6h 47m

1 stop

SEA11:57 pmSeattle/Tacoma Intl

$261

Find similar

Delta

Sep 30

SEA7:25 amSeattle/Tacoma Intl

8h 10m

1 stop

MDW5:35 pmChicago Midway

Oct 30

MDW1:08 pmChicago Midway

7h 15m

1 stop

SEA6:23 pmSeattle/Tacoma Intl

$435

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 9/27

7:00 am-9:28 pm

1 stop12h 28m

Chicago O'Hare Intl

Sun 9/28

10:42 am-12:30 am

1 stop15h 48m

$190

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/7

1:02 pm-11:53 pm

1 stop8h 51m

Chicago O'Hare Intl

Sat 10/25

5:59 pm-8:35 pm

Nonstop4h 36m

$191

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 10/15

8:43 pm-11:53 pm

1 stop25h 10m

Chicago O'Hare Intl

Wed 10/22

7:15 am-12:07 pm

1 stop6h 52m

$192

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 11/24

6:00 am-12:03 pm

Nonstop4h 03m

Chicago O'Hare Intl

Tue 11/25

6:00 am-8:37 am

Nonstop4h 37m

$194

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 10/25

5:45 am-11:45 am

Nonstop4h 00m

Chicago Midway

Fri 10/31

9:05 am-11:40 am

Nonstop4h 35m

$194

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 10/25

5:45 am-11:45 am

Nonstop4h 00m

Chicago Midway

Fri 10/31

2:30 pm-9:30 pm

1 stop9h 00m

$204

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/14

5:55 pm-11:50 pm

Nonstop3h 55m

Chicago O'Hare Intl

Wed 10/22

6:05 pm-8:45 pm

Nonstop4h 40m

$209

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 10/31

6:15 pm-12:24 am

Nonstop4h 09m

Chicago O'Hare Intl

Fri 11/7

2:05 pm-6:48 pm

1 stop6h 43m

$211

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 10/31

7:00 am-1:09 pm

Nonstop4h 09m

Chicago O'Hare Intl

Fri 11/7

8:45 am-11:28 am

Nonstop4h 43m

$218

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Wed 10/22

11:15 pm-8:40 am

1 stop7h 25m

Chicago Midway

Fri 10/24

7:10 pm-11:57 pm

1 stop6h 47m

$261

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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 $224. If you’re not able to fly to Chicago in January, then February is your next best option. Flight prices from Seattle to Chicago during February average around $262.

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 $396. 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 $504.

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 $456.

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 $310 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 $268 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 September 2025, prices for Seattle to Chicago flights are approximately 2% 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	$167
Fastest flight time	3h 53m
Direct flights	Every day
Airports in Chicago	2 airports

The best one-way flight to Chicago from Seattle in the past 72 hours is $167. The best round-trip flight deal from Seattle to Chicago found on momondo in the last 72 hours is $268.

The fastest flight from Seattle to Chicago takes 3h 53m

Direct flights go from Seattle to Chicago every day.

There are 2 airports near Chicago: 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 September 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 16.41% of the total bookings. Other popular models include Boeing 737 MAX 9 with 16.39%, Boeing 737-800 with 15.93%, and Airbus A321neo with 9.26%.
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 26%, United Airlines at 17%, and American Airlines at 14%.

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 $107	Free Cancellation	Rating 6.3 8,019 reviews	Search Spirit Airlines flights
Delta	PriceFrom $119	Free Cancellation	Rating 7.9 7,957 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $121	Free Cancellation	Rating 7.8 2,724 reviews	Search Hawaiian Airlines flights
Frontier	PriceFrom $137	Free Cancellation	Rating 5.8 3,174 reviews	Search Frontier flights
United Airlines	PriceFrom $169	Free Cancellation	Rating 7.4 8,924 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $171	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $177	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $184	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights

Alaska Airlines Flights From Seattle to Chicago
Alaska Airlines flies from Seattle to Chicago around 26 times per week, with 10,000 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Seattle to Chicago in the last 72 hours was $171 (round-trip), much lower than the average airfare cost of $330 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 $384, however, with flight time and availability significantly affecting the price. Southwest (8.0/10 from 4,242 user reviews) flies into Chicago from Seattle 17 times in an average week so prices can vary.

Merrillville

New Buffalo

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 $93

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 10/6. 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

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to Chicago

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Alaska Airlines flights from Seattle to Chicago

Our best Alaska Airlines deals on Seattle to Chicago flight tickets

Delta flights from Seattle to Chicago

Our best Delta 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 $224. If you’re not able to fly to Chicago in January, then February is your next best option. Flight prices from Seattle to Chicago during February average around $262.

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 $456.

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 September 2025, prices for Seattle to Chicago flights are approximately 2% cheaper when compared to flights at the same time last year.

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

Frontier, United Airlines, and Southwest 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?

64 flights are operational daily from Seattle to Chicago as of September 2025. The most popular departure time for this route is 10:00AM, with 50% of flights per day taking off at noon.

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

As of September 2025, 448 flights take off from Seattle and land in Chicago each week. The most common flight departure day for this route is Mon, with 15% 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

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