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$93+ Cheap flights from Chicago (CHI) to Seattle (SEA)

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Find cheap flights from Chicago to Seattle with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or April, booked 52 days in advance, depart on a Wednesday or Friday and return on a Wednesday

Cheap flight deals from Chicago to Seattle

Cheapest flights from Chicago to Seattle
Explore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Delta deal was found by Cheapflights users on 12/16. 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 12/242:15 pmORD - SEA
Nonstop4h 45mDelta
Thu 1/15:55 pmSEA - ORD
Nonstop4h 04mDelta
Deal found 12/16$267
This Delta deal was found by Cheapflights users on 12/16. 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 12/242:15 pmORD - SEA
Nonstop4h 45mDelta
Fri 1/27:10 amSEA - ORD
Nonstop4h 10mDelta
Deal found 12/16$297
This Expedia deal was found by Cheapflights users on 12/15. 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.
Thu 12/257:00 amORD - SEA
1 stop7h 30mMultiple Airlines
Mon 12/298:30 amSEA - ORD
Nonstop4h 11mMultiple Airlines
Deal found 12/15$311
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:00 amORD - SEA
1 stop7h 30mFrontier
Thu 1/11:25 pmSEA - ORD
1 stop8h 47mFrontier
Deal found 12/16$315
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:00 amORD - SEA
1 stop7h 30mFrontier
Tue 12/302:54 pmSEA - ORD
1 stop7h 18mFrontier
Deal found 12/16$324
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:55 pmORD - SEA
Nonstop4h 52mUnited Airlines
Wed 12/3110:52 amSEA - ORD
Nonstop4h 08mUnited Airlines
Deal found 12/17$338
This Delta deal was found by Cheapflights users on 12/16. 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.
Tue 12/236:00 amORD - SEA
Nonstop4h 47mDelta
Wed 12/315:55 pmSEA - ORD
Nonstop4h 04mDelta
Deal found 12/16$347
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/278:26 pmORD - SEA
1 stop22h 52mMultiple Airlines
Mon 12/2912:25 amSEA - ORD
Nonstop4h 04mMultiple Airlines
Deal found 12/15$350
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:03 pmORD - SEA
1 stop9h 31mUnited Airlines
Thu 1/17:00 amSEA - ORD
Nonstop4h 08mUnited Airlines
Deal found 12/16$357
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:00 amORD - SEA
1 stop7h 30mFrontier
Thu 1/11:25 pmSEA - ORD
1 stop8h 47mFrontier
Deal found 12/16$364
This Southwest deal was found by Cheapflights users on 12/17. 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.
Sat 12/201:55 pmMDW - SEA
1 stop7h 40mSouthwest
Thu 1/16:35 amSEA - MDW
Nonstop3h 55mSouthwest
Deal found 12/17$432
This Southwest deal was found by Cheapflights users on 12/16. 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.
Sat 12/201:55 pmMDW - SEA
1 stop7h 40mSouthwest
Sat 1/107:00 amSEA - MDW
1 stop10h 05mSouthwest
Deal found 12/16$442

Find flight deals from Chicago to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Seattle (SEA). 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 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$177
(Southwest)

One-way from

$93
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$345

Good round-trip deal

$157 or less

Good one-way deal

$180 or less
Provider with most accurate pricing for Chicago (CHI)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Seattle/Tacoma Intl flights.
Search Deals
From Chicago (CHI) to Seattle/Tacoma Intl
Search Deals
One-way flight from Chicago (CHI) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 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 Chicago (CHI) to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Seattle 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 18, 2025.
Use the filters below to find and compare flights from Chicago to Seattle that are best for you.

Fly from

Chicago

Fly to

Seattle

Route

Depart

Return

Price

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Sun 1/11

8:05 am-10:50 am

Nonstop4h 45m

Seattle/Tacoma Intl

Sun 1/25

6:35 am-12:35 pm

Nonstop4h 00m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 2/20

7:00 am-9:51 am

Nonstop4h 51m

Seattle/Tacoma Intl

Sun 2/22

10:22 am-4:33 pm

Nonstop4h 11m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 1/11

7:54 pm-10:43 pm

Nonstop4h 49m

Seattle/Tacoma Intl

Sun 1/25

7:00 am-1:08 pm

Nonstop4h 08m

$177

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Mon 1/26

10:35 am-1:15 pm

Nonstop4h 40m

Seattle/Tacoma Intl

Wed 2/4

6:45 am-12:40 pm

Nonstop3h 55m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 2/10

8:00 am-10:46 am

Nonstop4h 46m

Seattle/Tacoma Intl

Mon 2/16

6:00 am-12:01 pm

Nonstop4h 01m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 1/26

1:20 pm-4:01 pm

Nonstop4h 41m

Seattle/Tacoma Intl

Wed 2/4

2:10 pm-8:17 pm

Nonstop4h 07m

$177

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Sat 1/10

8:15 am-11:00 am

Nonstop4h 45m

Seattle/Tacoma Intl

Sun 1/18

6:45 am-12:40 pm

Nonstop3h 55m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/8

1:20 pm-4:01 pm

Nonstop4h 41m

Seattle/Tacoma Intl

Mon 1/12

2:10 pm-8:17 pm

Nonstop4h 07m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 1/7

8:00 am-10:46 am

Nonstop4h 46m

Seattle/Tacoma Intl

Fri 1/9

5:50 pm-11:50 pm

Nonstop4h 00m

$177

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Thu 1/8

10:35 am-1:15 pm

Nonstop4h 40m

Seattle/Tacoma Intl

Tue 1/13

6:45 am-12:40 pm

Nonstop3h 55m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 44 results
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Compare providers for flights from Chicago to Seattle

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 Chicago to Seattle in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*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 Chicago-Seattle flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Chicago-Seattle flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Chicago-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Seattle 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 Chicago-Seattle 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 Chicago to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Chicago 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 Chicago to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Seattle. Price data was last updated on December 12, 2025.

The best time to book flights from Chicago to Seattle is 52 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Chicago to Seattle (average of $113). Flying from Chicago to Seattle in December is currently the most expensive (average of $185). 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 CHI to SEA?

Find hourly flight availability from Chicago to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s typically best to fly out from Chicago to Seattle in the morning. Doing so could potentially save you 9% on the flight price compared to flying in the evening, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Chicago to Seattle. Price data was last updated on December 13, 2025.

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

How much does it cost to fly round-trip from Chicago to Seattle?

The best insider tips for Chicago to Seattle 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 Chicago to Seattle trip
Airports
ORD

For a quick snack before your flight, grab some Garrett Popcorn near gate B8, a Chicago favorite.

Read more about ORDBy Ramsey Qubein
SEA

Take the Link light rail from SEA to downtown Seattle. It's affordable, runs every 10 minutes, and takes less than 40 minutes.

Read more about SEABy Brandon Schultz
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 Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated December 18, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Chicago to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,477 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,477 reviews
Alaska Airlines
8.0
Very good
11,477 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,005 reviews
Alaska Airlines
8.0
Very good
11,477 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,477 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,091 reviews
Alaska Airlines
8.0
Very good
11,477 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
American Airlines
7.2
Good
11,054 reviews
Alaska Airlines
8.0
Very good
11,477 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Seattle. 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 into for flights to Seattle from Chicago?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Chicago to Seattle. 8 airlines have flights to Seattle/Tacoma Intl from Chicago on a regular basis. Booking flights from Chicago to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 11 inbound flights from Chicago per day.

  • How long is the flight from Chicago to Seattle?

    For as low as $177, Southwest can have you in Seattle from Chicago in 4h 45m. The distance from Chicago to Seattle is about 1728 mi. Generally, flights for this route are nonstop.

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

    Our cheapest airline available from Chicago to Seattle is Hawaiian Airlines. Our recent data shows that you can find tickets from as low as $84 on this airline. Additional options worth looking into are Spirit Airlines and Delta, starting at $95 and $112 round-trip. Hawaiian Airlines is priced at 69% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $64. Hawaiian Airlines flights start at $84 while deals on Delta start at $84 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Chicago to Seattle consider choosing Gulf Air (77%), British Airways (72%) or Malaysia Airlines (71%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chicago to Seattle?

    Looking at all options, your cheapest flight can be booked for $93. While the most popular route (Chicago O'Hare Intl - Seattle/Tacoma Intl) can be booked for $167 on average, our data indicates $831 when flying from Chicago to Seattle.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Chicago to Seattle 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 Chicago to Seattle?

    Currently, September is the cheapest month in which you can book a flight from Chicago to Seattle (average of $113). Flying from Chicago to Seattle in December is currently the most expensive (average of $185). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Chicago to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Chicago to Seattle

Discover the top 8 airlines that operate flights from Chicago to Seattle. 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$91Average$251FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$95Average$164FlexibilityNo cancel feeOn-time65%
DeltaCheapest$119Average$303FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$142Average$263FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$169Average$292FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$174Average$326FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$176Average$319FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$194Average$412FlexibilityNo cancel feeOn-time63%

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