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$95+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
Aug 26 — Sep 21
Tue 8/26
Tue 9/2
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or April, booked 62 days in advance, depart on a Wednesday or Friday 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 August 21, 2025.

Round-trip from

$173
(Mytrip)

One-way from

$95
(Southwest)

Popular in

December

Cheapest in

February

Average price

$289

Good round-trip deal

$237 or less

Good one-way deal

$124 or less
From Chicago (CHI) to Seattle/Tacoma Intl
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One-way flight from Chicago (CHI) to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 21, 2025.

This Mytrip deal was found by Cheapflights users on 8/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:20 amORD - SEA
1 stop17h 39mFrontier
Wed 10/17:00 amSEA - ORD
1 stop12h 28mFrontier
Deal found 8/21$173
This FlightHub deal was found by Cheapflights users on 8/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:51 amORD - SEA
1 stop10h 57mFrontier
Thu 10/3012:58 pmSEA - ORD
1 stop9h 14mFrontier
Deal found 8/20$175
This Travelocity deal was found by Cheapflights users on 8/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:00 amORD - SEA
Nonstop4h 40mMultiple Airlines
Tue 11/412:58 pmSEA - ORD
1 stop9h 14mMultiple Airlines
Deal found 8/18$176
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/294:48 pmMDW - SEA
1 stop9h 42mFrontier
Fri 10/36:12 amSEA - MDW
1 stop7h 41mFrontier
Deal found 8/19$177
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Sun 8/316:20 amORD - SEA
Nonstop4h 30mHawaiian Airlines
Tue 9/95:55 pmSEA - ORD
Nonstop4h 08mHawaiian Airlines
Deal found 8/19$177
This Mytrip deal was found by Cheapflights users on 8/19. 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.
Wed 9/247:20 amORD - SEA
1 stop17h 39mFrontier
Mon 9/296:12 amSEA - ORD
1 stop15h 47mFrontier
Deal found 8/19$178
This Delta deal was found by Cheapflights users on 8/21. 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.
Sun 8/317:15 amORD - SEA
Nonstop4h 30mDelta
Sat 9/65:50 pmSEA - ORD
Nonstop4h 01mDelta
Deal found 8/21$179
This Mytrip deal was found by Cheapflights users on 8/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1310:31 amMDW - SEA
1 stop27h 36mFrontier
Wed 10/158:43 pmSEA - MDW
1 stop25h 53mFrontier
Deal found 8/21$180
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:20 amORD - SEA
1 stop17h 39mFrontier
Tue 9/167:00 amSEA - ORD
1 stop12h 28mFrontier
Deal found 8/19$180
This Gotogate deal was found by Cheapflights users on 8/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1310:31 amMDW - SEA
1 stop27h 36mFrontier
Sat 10/188:43 pmSEA - MDW
1 stop25h 53mFrontier
Deal found 8/20$181
This Expedia deal was found by Cheapflights users on 8/18. 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.
Tue 10/78:00 amORD - SEA
Nonstop4h 40mMultiple Airlines
Tue 10/141:02 pmSEA - ORD
1 stop8h 51mMultiple Airlines
Deal found 8/18$181
This FlightHub deal was found by Cheapflights users on 8/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:24 pmMDW - SEA
1 stop19h 49mFrontier
Fri 10/319:22 pmSEA - MDW
1 stop15h 35mFrontier
Deal found 8/20$183

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 August 21, 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

Thu 10/16

6:24 pm-7:33 am

1 stop15h 09m

Seattle/Tacoma Intl

Mon 10/20

2:31 pm-12:24 am

1 stop7h 53m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 8/31

7:15 am-9:45 am

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 9/6

5:50 pm-11:51 pm

Nonstop4h 01m

$179

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 8/31

6:20 am-8:50 am

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 9/6

5:55 pm-12:03 am

Nonstop4h 08m

$179

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Mon 10/13

10:31 am-12:07 pm

1 stop27h 36m

Seattle/Tacoma Intl

Sat 10/18

8:43 pm-12:36 am

1 stop25h 53m

$181

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Sat 11/1

3:57 pm-9:18 am

1 stop19h 21m

Seattle/Tacoma Intl

Wed 11/5

12:58 pm-11:30 am

1 stop20h 32m

$183

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 10/25

8:00 am-10:40 am

Nonstop4h 40m

Seattle/Tacoma Intl

Fri 10/31

6:15 pm-12:24 am

Nonstop4h 09m

$184

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 9/6

6:13 pm-8:50 pm

Nonstop4h 37m

Seattle/Tacoma Intl

Wed 9/17

5:55 pm-11:55 pm

Nonstop4h 00m

$184

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 9/6

6:13 pm-8:50 pm

Nonstop4h 37m

Seattle/Tacoma Intl

Tue 9/16

5:55 pm-11:55 pm

Nonstop4h 00m

$184

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 10/25

7:37 am-10:15 am

Nonstop4h 38m

Seattle/Tacoma Intl

Fri 10/31

5:55 pm-11:50 pm

Nonstop3h 55m

$184

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Tue 11/4

10:50 am-1:25 pm

Nonstop4h 35m

Seattle/Tacoma Intl

Sat 11/8

5:45 am-11:40 am

Nonstop3h 55m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 36 results
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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 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

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 August 8, 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, 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 June is currently the most expensive (average of $388). 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 August 21, 2025.

It’s typically best to fly out from Chicago to Seattle in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, 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 August 17, 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 August 21, 2025.

The most flights from CHI to SEA are scheduled on a Thursday (70 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (29 on average).

What’s the top layover airport for flights from Chicago to Seattle?

Share of 1-stop round-trip flights from Chicago to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.

Denver (DEN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Chicago to Seattle on Cheapflights.

What’s the cheapest layover airport for flights from Chicago to Seattle?

Average round-trip fare for 1-stop flights from Chicago to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $108.

What’s the fastest layover option from Chicago to Seattle?

Shortest average travel time for 1-stop one-way flights from Chicago to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 10h 20m.

Which airport typically offers the quickest layover for flights from Chicago to Seattle?

Average layover duration for 1-stop one-way flights from Chicago to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 3h 07m.

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 August 21, 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
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,672 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,930 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 46 inbound flights from Chicago per day.

  • How long is the flight from Chicago to Seattle?

    For as low as $179, Frontier can have you in Seattle from Chicago in 4h 30m. The distance from Chicago to Seattle is about 1715 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $89 on this airline. Additional options worth looking into are Spirit Airlines and Frontier, starting at $97 and $118 round-trip. Hawaiian Airlines is priced at 67% 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 $95. United Airlines flights start at $95 while deals on American Airlines start at $95 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 (87%), Delta (86%) or KLM (83%) 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 $169 on average our data indicates $615 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 June is currently the most expensive (average of $388). 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
SeaTac
Tukwila
Tacoma
Lakewood
Lacey
Ocean Shores
Lynnwood
Leavenworth
Renton
Olympia
Kent
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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 August 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$89Average$249FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$97Average$202FlexibilityNo cancel feeOn-time65%
FrontierCheapest$118Average$263FlexibilityNo cancel feeOn-time62%
DeltaCheapest$120Average$288FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$166Average$291FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$169Average$324FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$169Average$321FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$194Average$415FlexibilityNo cancel feeOn-time63%

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