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$90+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Find cheap flights from Chicago to Seattle 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
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3. Compare prices and book
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Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or September, booked 62 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$168
(Kiwi.com)

One-way from

$90
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$317

Good round-trip deal

$268 or less

Good one-way deal

$147 or less
Provider with most accurate pricing for Chicago (CHI)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Seattle/Tacoma Intl flights.
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From Chicago (CHI) to Seattle/Tacoma Intl
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One-way flight from Chicago (CHI) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Chicago (CHI) to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Chicago (CHI) to Seattle/Tacoma Intl.
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Find 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 March 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/27. 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 4/266:00 amORD - SEA
Nonstop4h 30mMultiple Airlines
Sat 5/310:48 amSEA - ORD
Nonstop4h 12mMultiple Airlines
Deal found 3/27$168
This Hawaiian Airlines deal was found by Cheapflights users on 3/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:00 amORD - SEA
Nonstop4h 30mHawaiian Airlines
Wed 4/305:58 pmSEA - ORD
Nonstop4h 01mHawaiian Airlines
Deal found 3/28$169
This Mytrip deal was found by Cheapflights users on 3/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/295:36 amORD - SEA
2 stops31h 59mSpirit Airlines
Tue 5/612:30 pmSEA - ORD
1 stop20h 25mSpirit Airlines
Deal found 3/27$173
This Alaska Airlines deal was found by Cheapflights users on 3/26. 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 8/318:42 pmORD - SEA
Nonstop4h 40mAlaska Airlines
Sat 9/205:51 pmSEA - ORD
Nonstop4h 08mAlaska Airlines
Deal found 3/26$174
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/237:00 amORD - SEA
1 stop8h 59mUnited Airlines
Tue 4/297:00 amSEA - ORD
Nonstop4h 06mUnited Airlines
Deal found 3/27$175
This Southwest deal was found by Cheapflights users on 3/25. 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 4/232:20 pmMDW - SEA
Nonstop4h 30mSouthwest
Wed 4/306:00 amSEA - MDW
Nonstop4h 10mSouthwest
Deal found 3/25$189
This Southwest deal was found by Cheapflights users on 3/27. 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 4/302:50 pmORD - SEA
1 stop11h 00mSouthwest
Wed 5/75:00 amSEA - ORD
1 stop7h 00mSouthwest
Deal found 3/27$194
This Delta deal was found by Cheapflights users on 3/28. 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 4/306:25 pmORD - SEA
Nonstop4h 47mDelta
Mon 5/55:55 pmSEA - ORD
Nonstop4h 04mDelta
Deal found 3/28$199
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/188:50 pmMDW - SEA
1 stop14h 45mFrontier
Sun 4/2011:36 amSEA - MDW
1 stop15h 44mFrontier
Deal found 3/27$240
This American Airlines deal was found by Cheapflights users on 3/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/237:35 amORD - SEA
Nonstop4h 40mAmerican Airlines
Thu 4/242:58 pmSEA - ORD
1 stop7h 42mAmerican Airlines
Deal found 3/28$263
This Frontier deal was found by Cheapflights users on 3/28. 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.
Fri 4/47:30 amORD - SEA
1 stop8h 46mFrontier
Fri 4/111:56 pmSEA - ORD
1 stop8h 41mFrontier
Deal found 3/28$268

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 March 28, 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

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/26

6:00 am-8:30 am

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 5/3

10:48 am-5:00 pm

Nonstop4h 12m

$168

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/3

7:05 am-9:40 am

Nonstop4h 35m

Seattle/Tacoma Intl

Sat 9/13

11:40 am-5:50 pm

Nonstop4h 10m

$169

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/26

9:00 am-11:32 am

Nonstop4h 32m

Seattle/Tacoma Intl

Sat 5/3

5:58 pm-11:59 pm

Nonstop4h 01m

$170

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 8/31

8:42 pm-11:22 pm

Nonstop4h 40m

Seattle/Tacoma Intl

Sat 9/20

5:51 pm-11:59 pm

Nonstop4h 08m

$174

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/23

7:00 am-1:59 pm

1 stop8h 59m

Seattle/Tacoma Intl

Tue 4/29

7:00 am-1:06 pm

Nonstop4h 06m

$175

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 5/7

9:02 pm-12:10 am

1 stop29h 08m

Seattle/Tacoma Intl

Tue 5/13

3:20 pm-5:25 am

1 stop12h 05m

$184

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Wed 4/23

2:20 pm-4:50 pm

Nonstop4h 30m

Seattle/Tacoma Intl

Wed 4/30

6:00 am-12:10 pm

Nonstop4h 10m

$189

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/23

2:50 pm-11:50 pm

1 stop11h 00m

Seattle/Tacoma Intl

Fri 4/25

2:55 pm-11:05 pm

1 stop6h 10m

$224

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Fri 4/18

8:50 pm-9:35 am

1 stop14h 45m

Seattle/Tacoma Intl

Sun 4/20

11:36 am-5:20 am

1 stop15h 44m

$240

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 5/1

8:14 pm-6:02 pm

1 stop23h 48m

Seattle/Tacoma Intl

Mon 5/5

12:21 pm-11:41 pm

1 stop9h 20m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 25 results
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
FlightsMojoPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
Trip.comPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

The best insider tips for Chicago to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to Seattle trip
Airports
ORD

For a quick departure from ORD, consider taking the "L" train, which avoids Chicago traffic and offers a direct route from the city center.

Read more about ORDby Ramsey Qubein
SEA

Use the Link light rail from SEA for an affordable and convenient ride to downtown Seattle, with trains running every 10 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

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 March 21, 2025.

The best time to book flights from Chicago to Seattle is 62 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, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of $238). Flying from Chicago to Seattle in July is currently the most expensive (average of $411). 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 March 28, 2025.

It’s typically best to fly out from Chicago to Seattle in the evening. Doing so could potentially save you 21% on the flight price compared to flying at noon, 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 March 23, 2025.

Travelers seeking maximum savings on their Chicago to Seattle flight should consider departing on Wednesday evenings 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 Chicago to Seattle

Explore weekly flight availability from Chicago to Seattle. 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 March 28, 2025.

The most flights from CHI to SEA are scheduled on a Thursday (47 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 March 28, 2025.
Read through reviews of airlines operating flights from Chicago to Seattle, such as Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,897 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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. 9 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 26 inbound flights from Chicago per day.

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

    Our cheapest airline available from Chicago to Seattle is Alaska Airlines. Our recent data shows that you can find tickets from as low as $169 on this airline. Additional options worth looking into are Hawaiian Airlines and United Airlines, starting at $170 and $175 round-trip. Alaska Airlines is priced at 41% 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 United Airlines, which is currently one of the cheapest options available, starting at $90. Southwest flights start at $94 while deals on Spirit Airlines start at $98 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 Air France (92%), Brussels Airlines (83%) or Avianca (82%) 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 $84. While the most popular route (Chicago O'Hare Intl - Seattle/Tacoma Intl) can be booked for $161 on average our data indicates $823 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, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of $238). Flying from Chicago to Seattle in July is currently the most expensive (average of $411). 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
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Cle Elum
Centralia
Mukilteo
Aberdeen
Shoreline
Lynnwood
Shelton
Silverdale
Redmond
Monroe

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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$114Average$283FlexibilityNo cancel feeOn-time85%
FrontierCheapest$118Average$226FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$121Average$240FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$136Average$306FlexibilityNo cancel feeOn-time75%
DeltaCheapest$136Average$358FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$151Average$328FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$167Average$328FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$408FlexibilityNo cancel feeOn-time63%
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