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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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
Jul 13 — Jul 201
Sun 7/13
Sun 7/20
1 adult, Economy
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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 July 8, 2025.

Round-trip from

$170
(Southwest)

One-way from

$95
(Southwest)

Popular in

December

Cheapest in

February

Average price

$329

Good round-trip deal

$197 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 ($14 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 July 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 July 8, 2025.

This Southwest deal was found by Cheapflights users on 7/7. 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 8/138:40 amMDW - SEA
Nonstop4h 30mSouthwest
Tue 8/1911:10 pmSEA - MDW
Nonstop4h 05mSouthwest
Deal found 7/7$170
This Southwest deal was found by Cheapflights users on 7/6. 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.
Fri 8/155:25 pmORD - SEA
1 stop8h 50mSouthwest
Tue 8/1911:10 amSEA - ORD
2 stops9h 55mSouthwest
Deal found 7/6$171
This Delta deal was found by Cheapflights users on 7/7. 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.
Mon 8/252:15 pmORD - SEA
1 stop6h 45mDelta
Fri 8/295:50 pmSEA - ORD
Nonstop4h 01mDelta
Deal found 7/7$173
This American Airlines deal was found by Cheapflights users on 7/8. 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 8/206:50 amORD - SEA
Nonstop4h 29mAmerican Airlines
Sun 8/2412:46 amSEA - ORD
Nonstop4h 06mAmerican Airlines
Deal found 7/8$174
This Alaska Airlines deal was found by Cheapflights users on 7/8. 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.
Sat 8/306:20 amORD - SEA
Nonstop4h 30mAlaska Airlines
Sun 8/3112:59 amSEA - ORD
Nonstop4h 04mAlaska Airlines
Deal found 7/8$176
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Tue 8/59:16 pmORD - SEA
Nonstop4h 43mUnited Airlines
Thu 8/712:20 amSEA - ORD
Nonstop4h 08mUnited Airlines
Deal found 7/7$185
This Hawaiian Airlines deal was found by Cheapflights users on 7/6. 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.
Tue 9/95:45 pmORD - SEA
Nonstop4h 32mHawaiian Airlines
Fri 9/1212:59 amSEA - ORD
Nonstop4h 04mHawaiian Airlines
Deal found 7/6$189
This Priceline deal was found by Cheapflights users on 7/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/237:00 amORD - SEA
1 stop6h 45mFrontier
Sat 8/3012:40 pmSEA - ORD
1 stop8h 59mFrontier
Deal found 7/7$190
This Priceline deal was found by Cheapflights users on 7/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/307:08 amORD - SEA
1 stop11h 17mMultiple Airlines
Mon 8/412:13 pmSEA - ORD
1 stop8h 42mMultiple Airlines
Deal found 7/6$206
This Priceline deal was found by Cheapflights users on 7/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:48 pmMDW - SEA
1 stop9h 42mFrontier
Fri 9/196:12 amSEA - MDW
1 stop7h 41mFrontier
Deal found 7/7$218
This Delta deal was found by Cheapflights users on 7/8. 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 8/1912:43 pmMDW - SEA
1 stop9h 42mDelta
Tue 8/266:00 amSEA - MDW
1 stop13h 44mDelta
Deal found 7/8$233

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 July 8, 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

Wed 8/13

8:40 am-11:10 am

Nonstop4h 30m

Seattle/Tacoma Intl

Tue 8/19

11:10 pm-5:15 am

Nonstop4h 05m

$170

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 8/15

5:25 pm-12:15 am

1 stop8h 50m

Seattle/Tacoma Intl

Tue 8/19

11:10 am-11:05 pm

2 stops9h 55m

$171

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 8/6

1:03 pm-3:42 pm

Nonstop4h 39m

Seattle/Tacoma Intl

Mon 8/11

4:25 pm-10:30 pm

Nonstop4h 05m

$173

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 8/20

6:50 am-9:19 am

Nonstop4h 29m

Seattle/Tacoma Intl

Fri 8/22

12:46 am-6:52 am

Nonstop4h 06m

$174

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 8/22

7:15 am-9:45 am

Nonstop4h 30m

Seattle/Tacoma Intl

Fri 8/29

5:50 pm-11:51 pm

Nonstop4h 01m

$175

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 8/18

8:42 pm-11:24 pm

Nonstop4h 42m

Seattle/Tacoma Intl

Sun 8/24

12:59 am-7:03 am

Nonstop4h 04m

$176

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 8/5

9:16 pm-11:59 pm

Nonstop4h 43m

Seattle/Tacoma Intl

Thu 8/7

12:20 am-6:28 am

Nonstop4h 08m

$185

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 8/23

7:00 am-11:45 am

1 stop6h 45m

Seattle/Tacoma Intl

Sat 8/30

12:40 pm-11:39 pm

1 stop8h 59m

$190

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 7/29

7:08 am-4:25 pm

1 stop11h 17m

Seattle/Tacoma Intl

Mon 8/11

5:30 pm-6:03 am

1 stop10h 33m

$198

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 7/30

7:08 am-4:25 pm

1 stop11h 17m

Seattle/Tacoma Intl

Mon 8/4

12:13 pm-10:55 pm

1 stop8h 42m

$206

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 25 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 June 27, 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 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 July 8, 2025.

It’s typically best to fly out from Chicago to Seattle in the evening. Doing so could potentially save you 15% 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 July 6, 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 July 8, 2025.

The most flights from CHI to SEA are scheduled on a Monday (78 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (29 on average).

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

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 July 8, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,256 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,958 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.8
Good
2,554 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,844 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 57 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 Southwest. Our recent data shows that you can find tickets from as low as $170 on this airline. Additional options worth looking into are Hawaiian Airlines and American Airlines, starting at $173 and $174 round-trip. Southwest is priced at 38% 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 Frontier start at $97 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 Austrian Airlines (85%), Brussels Airlines (83%) or Air France (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 $97. While the most popular route (Chicago O'Hare Intl - Seattle/Tacoma Intl) can be booked for $82 on average our data indicates $737 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 Chicago?

Book flights to Chicago if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Chehalis
Kirkland
Aberdeen
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 July 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$90Average$247FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$98Average$234FlexibilityNo cancel feeOn-time65%
FrontierCheapest$118Average$235FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$351FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$157Average$293FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$167Average$327FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$169Average$327FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$418FlexibilityNo cancel feeOn-time63%

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