HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$97+ Cheap flights from Seattle (SEA) to Chicago (CHI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Chicago with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago are usually found in January or February, booked 84 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Seattle to Chicago

Cheapest flights from Seattle to Chicago
Explore the most affordable flight options available from Seattle to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:49 pmSEA - ORD
Nonstop4h 10mAlaska Airlines
Wed 1/76:06 pmORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 12/20$237
This Expedia deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:49 pmSEA - ORD
Nonstop4h 10mMultiple Airlines
Sun 1/410:49 pmORD - SEA
1 stop13h 22mMultiple Airlines
Deal found 12/22$240
This Alaska Airlines deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:49 pmSEA - ORD
Nonstop4h 10mAlaska Airlines
Mon 1/53:37 pmORD - SEA
1 stop11h 04mAlaska Airlines
Deal found 12/20$287
This Southwest deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:35 amSEA - MDW
Nonstop3h 55mSouthwest
Mon 1/55:15 pmMDW - SEA
1 stop9h 15mSouthwest
Deal found 12/20$287
This Expedia deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - ORD
1 stop8h 47mFrontier
Sun 1/410:49 pmORD - SEA
1 stop13h 22mFrontier
Deal found 12/22$288
This Delta deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 pmSEA - ORD
Nonstop4h 04mDelta
Mon 1/57:30 amORD - SEA
Nonstop4h 45mDelta
Deal found 12/21$297
This Expedia deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:54 pmSEA - ORD
1 stop7h 18mMultiple Airlines
Sun 1/256:06 pmORD - SEA
Nonstop4h 50mMultiple Airlines
Deal found 12/20$300
This Alaska Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:25 amSEA - ORD
Nonstop4h 04mAlaska Airlines
Wed 1/286:06 pmORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 12/22$307
This Expedia deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:54 pmSEA - ORD
1 stop7h 18mMultiple Airlines
Thu 1/299:00 amORD - SEA
1 stop10h 29mMultiple Airlines
Deal found 12/20$329
This Expedia deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:25 pmSEA - ORD
1 stop8h 47mMultiple Airlines
Sun 1/256:06 pmORD - SEA
Nonstop4h 50mMultiple Airlines
Deal found 12/21$330
This Southwest deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:20 amSEA - MDW
1 stop8h 20mSouthwest
Mon 1/55:15 pmMDW - SEA
1 stop9h 15mSouthwest
Deal found 12/21$396
This Southwest deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:15 amSEA - MDW
1 stop9h 05mSouthwest
Thu 1/158:05 amMDW - SEA
Nonstop4h 45mSouthwest
Deal found 12/22$427

Find flight deals from Seattle to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 23, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$177
(Alaska Airlines)

One-way from

$97
(Mytrip)

Popular in

December

Cheapest in

January

Average price

$387

Good round-trip deal

$309 or less

Good one-way deal

$179 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Chicago (CHI) flights.
Search Deals
From Seattle/Tacoma Intl to Chicago (CHI)
Search Deals
One-way flight from Seattle/Tacoma Intl to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Chicago (CHI).
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

Fly from

Seattle

Fly to

Chicago

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 3/18

12:35 am-6:39 am

Nonstop4h 04m

Chicago O'Hare Intl

Thu 3/26

6:00 am-8:37 am

Nonstop4h 37m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 1/18

7:50 pm-1:10 pm

1 stop15h 20m

Chicago O'Hare Intl

Sun 1/25

6:06 pm-8:56 pm

Nonstop4h 50m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/15

7:50 pm-1:10 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 1/22

8:00 am-10:46 am

Nonstop4h 46m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 2/6

11:00 am-5:10 pm

Nonstop4h 10m

Chicago O'Hare Intl

Mon 2/9

2:06 pm-6:43 pm

1 stop6h 37m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 1/26

9:45 pm-1:10 pm

1 stop13h 25m

Chicago O'Hare Intl

Wed 1/28

6:06 pm-8:56 pm

Nonstop4h 50m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 1/17

7:50 pm-1:10 pm

1 stop15h 20m

Chicago O'Hare Intl

Sun 1/25

6:06 pm-8:56 pm

Nonstop4h 50m

$177

SeattleChicago

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Thu 1/15

8:35 am-7:45 pm

2 stops9h 10m

Chicago Midway

Thu 1/22

6:10 am-12:20 pm

1 stop8h 10m

$182

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 2/21

5:55 pm-11:56 pm

Nonstop4h 01m

Chicago O'Hare Intl

Wed 2/25

3:07 pm-11:40 pm

1 stop10h 33m

$186

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 1/19

7:10 am-1:22 pm

Nonstop4h 12m

Chicago O'Hare Intl

Wed 1/28

7:20 am-3:00 pm

1 stop9h 40m

$187

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/15

7:10 am-1:22 pm

Nonstop4h 12m

Chicago O'Hare Intl

Tue 1/27

2:50 pm-11:15 pm

1 stop10h 25m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 48 results
1
2
3
...
5

Compare providers for flights from Seattle to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Chicago in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Chicago flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Seattle-Chicago flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Seattle-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Chicago flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Chicago

How far ahead should I book a flight from Seattle to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Chicago. Price data was last updated on December 19, 2025.

The price you pay for your flight from Seattle to Chicago may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Chicago?

Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of $114). Flying from Seattle to Chicago in July is currently the most expensive (average of $169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to CHI?

Find hourly flight availability from Seattle to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

It’s typically best to fly out from Seattle to Chicago in the evening. Doing so could potentially save you 8% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Seattle to Chicago?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Chicago. Price data was last updated on December 20, 2025.

Travelers seeking maximum savings on their Seattle to Chicago flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Chicago

Explore weekly flight availability from Seattle to Chicago. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 23, 2025.

The most flights from SEA to CHI are scheduled on a Friday (51 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (15 on average).

The best insider tips for Seattle to Chicago flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Chicago trip
Airports
SEA

Use SEA Spot Saver to book security screening appointments in advance, reducing wait times. Sign up online a few days before your flight.

Read more about SEABy Brandon Schultz
ORD

For a quick city transfer, take the “L” train from ORD to downtown Chicago, avoiding traffic delays common with taxis or rideshares.

Read more about ORDBy Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on ORD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chicago. Reviews last updated December 23, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,512 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,512 reviews
Alaska Airlines
8.0
Very good
11,512 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,014 reviews
Alaska Airlines
8.0
Very good
11,512 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,512 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,105 reviews
Alaska Airlines
8.0
Very good
11,512 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
11,054 reviews
Alaska Airlines
8.0
Very good
11,512 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Chicago?

    For a flight from Seattle to Chicago, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 34 outbound flights to Chicago per day. 8 airlines have flights to Chicago from Seattle/Tacoma Intl on a regular basis.

  • How long is the flight from Seattle to Chicago?

    Departing from Seattle to Chicago will take you 4h 04m. Seattle and Chicago are separated by a distance of 1715 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Chicago round-trip?

    Our cheapest airline available from Seattle to Chicago is Spirit Airlines. Our recent data shows that you can find tickets from as low as $107 on this airline. Additional options worth looking into are Delta and Hawaiian Airlines, starting at $110 and $114 round-trip. Users have found that Spirit Airlines is 63% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Chicago one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $72. Alaska Airlines flights start at $84 while deals on American Airlines start at $84 one-way.

  • What are the most popular routes from Seattle to Chicago?

    While some choose either Seattle/Tacoma Intl - Chicago Midway or Seattle/Tacoma Intl - Chicago Greater Rockford, Seattle/Tacoma Intl - Chicago O'Hare Intl is the most popular route from Seattle to Chicago.

  • What are the most reliable airlines from Seattle to Chicago?

    No one likes to see their flight delayed. When booking a flight from Seattle to Chicago consider choosing Austrian Airlines (92%), Avianca (86%) or British Airways (86%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Chicago?

    Looking for the cheapest flight from Seattle to Chicago? While on average our users pay $949, our data indicates the cheapest price to be $98. The most popular route (Seattle/Tacoma Intl - Chicago O'Hare Intl), is priced around $146.

  • Can I find deals for flights from Seattle to Chicago that include hotel bookings?

    Yes. In addition to deals on Seattle to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Chicago.

  • Can I find deals for business class flights from Seattle to Chicago?

    Yes. Cheapflights offers flight deals from Seattle to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Chicago?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of $114). Flying from Seattle to Chicago in July is currently the most expensive (average of $169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lansing
Merrillville
Hammond
Porter
Benton Harbor

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to O'Hare Intl flights
Portland to O'Hare Intl flights
Seattle to Midway flights
Seattle to St. Louis flights
Portland to Midway flights
Portland to St. Louis flights
Spokane to O'Hare Intl flights
Seattle to Moline flights
Seattle to Decatur flights
Spokane to Midway flights
Pasco to O'Hare Intl flights
Spokane to St. Louis flights
Seattle to Evansville flights
Seattle to Bloomington flights
Wenatchee to O'Hare Intl flights
Seattle to Peoria flights
Portland to Peoria flights
Seattle to Champaign flights
Portland to Bloomington flights
Pasco to St. Louis flights
Portland to Decatur flights
Spokane to Moline flights
Portland to Moline flights
Bellingham to O'Hare Intl flights
Spokane to Peoria flights
Seattle to Paducah flights
Seattle to Springfield flights
Pasco to Midway flights
Yakima to O'Hare Intl flights
Walla Walla to O'Hare Intl flights
Portland to Dubuque flights
Pullman to O'Hare Intl flights
Seattle to Rockford flights
Bellingham to St. Louis flights
Walla Walla to Moline flights
Portland to Champaign flights
Seattle to Dubuque flights
Portland to Rockford flights
Spokane to Bloomington flights
Spokane to Champaign flights
Spokane to Rockford flights
Seattle to Quincy flights
Walla Walla to St. Louis flights
Spokane to Dubuque flights
Spokane to Evansville flights
Spokane to Springfield flights
Pullman to St. Louis flights
Portland to Evansville flights

Top 8 airlines flying from Seattle to Chicago

Discover the top 8 airlines that operate flights from Seattle to Chicago. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$107Average$189FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$121Average$288FlexibilityNo cancel feeOn-time85%
DeltaCheapest$122Average$293FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$137Average$273FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$166Average$322FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$170Average$320FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$186Average$335FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$358FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.