Seattle

$86+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
Mar 2 — Mar 91
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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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The best prices from Chicago to Seattle/Tacoma Intl are usually found in September or February, 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 February 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$168
(Southwest)

One-way from

$86
(CheapOair)

Popular in

July

Cheapest in

September

Average price

$229

Good round-trip deal

$271 or less

Good one-way deal

$145 or less
Provider with most accurate pricing for Chicago (CHI)-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for Chicago (CHI)-Seattle/Tacoma Intl flights.
From Chicago (CHI) to Seattle/Tacoma Intl
One-way flight from Chicago (CHI) to Seattle/Tacoma Intl
Highest demand for flights based on searches. 18% potential increase in price ($64 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Chicago (CHI) to Seattle/Tacoma Intl.
Price to beat on a one-way flight from Chicago (CHI) to Seattle/Tacoma Intl.

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 February 25, 2025.

This FlightHub deal was found by Cheapflights users on 2/24. 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 3/182:42 pmORD - SEA
1 stop20h 01mSpirit Airlines
Mon 3/249:48 amSEA - ORD
1 stop18h 54mSpirit Airlines
Deal found 2/24$168
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:25 pmORD - SEA
Nonstop4h 45mDelta
Sat 4/265:55 pmSEA - ORD
Nonstop4h 04mDelta
Deal found 2/25$169
This Southwest deal was found by Cheapflights users on 2/24. 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.
Tue 4/222:20 pmMDW - SEA
Nonstop4h 30mSouthwest
Wed 4/306:00 amSEA - MDW
Nonstop4h 10mSouthwest
Deal found 2/24$170
This American Airlines deal was found by Cheapflights users on 2/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/227:35 amORD - SEA
Nonstop4h 40mAmerican Airlines
Tue 4/2911:59 pmSEA - ORD
Nonstop4h 05mAmerican Airlines
Deal found 2/25$170
This FlightHub deal was found by Cheapflights users on 2/24. 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.
Wed 3/1210:12 amORD - SEA
1 stop10h 50mMultiple Airlines
Thu 3/1311:38 amSEA - ORD
1 stop15h 32mMultiple Airlines
Deal found 2/24$173
This United Airlines deal was found by Cheapflights users on 2/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/17:59 pmORD - SEA
Nonstop4h 43mUnited Airlines
Sun 5/45:18 pmSEA - ORD
Nonstop4h 05mUnited Airlines
Deal found 2/25$179
This CheapOair deal was found by Cheapflights users on 2/23. 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.
Sat 3/157:45 amORD - SEA
1 stop8h 37mFrontier
Sun 3/238:59 pmSEA - ORD
1 stop13h 40mFrontier
Deal found 2/23$180
This Alaska Airlines deal was found by Cheapflights users on 2/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/187:45 amORD - SEA
Nonstop4h 43mAlaska Airlines
Wed 3/197:55 amSEA - ORD
Nonstop4h 21mAlaska Airlines
Deal found 2/25$209
This Hawaiian Airlines deal was found by Cheapflights users on 2/24. 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.
Thu 3/137:45 amORD - SEA
Nonstop4h 43mHawaiian Airlines
Mon 3/1711:59 pmSEA - ORD
Nonstop3h 54mHawaiian Airlines
Deal found 2/24$229
This Gotogate deal was found by Cheapflights users on 2/24. 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.
Tue 4/87:25 amMDW - SEA
1 stop8h 51mFrontier
Tue 4/154:16 pmSEA - MDW
1 stop11h 07mFrontier
Deal found 2/24$241
This Delta deal was found by Cheapflights users on 2/24. 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.
Sat 3/159:25 amMDW - SEA
1 stop6h 55mDelta
Tue 3/1810:30 pmSEA - MDW
1 stop8h 39mDelta
Deal found 2/24$437

Find flights from Chicago to Seattle within your budget

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 February 25, 2025.

Fly from

Chicago

Fly to

Seattle

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 3/18

2:42 pm-8:43 am

1 stop20h 01m

Seattle/Tacoma Intl

Mon 3/24

9:48 am-6:42 am

1 stop18h 54m

$168

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 4/22

6:25 pm-9:10 pm

Nonstop4h 45m

Seattle/Tacoma Intl

Sat 4/26

5:55 pm-11:59 pm

Nonstop4h 04m

$169

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Tue 4/22

2:20 pm-4:50 pm

Nonstop4h 30m

Seattle/Tacoma Intl

Wed 4/30

6:00 am-12:10 pm

Nonstop4h 10m

$170

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 4/22

7:35 am-10:15 am

Nonstop4h 40m

Seattle/Tacoma Intl

Tue 4/29

11:59 pm-6:04 am

Nonstop4h 05m

$170

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 3/12

10:12 am-7:02 pm

1 stop10h 50m

Seattle/Tacoma Intl

Thu 3/13

11:38 am-5:10 am

1 stop15h 32m

$173

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 3/15

7:45 am-2:22 pm

1 stop8h 37m

Seattle/Tacoma Intl

Sun 3/23

8:59 pm-12:39 pm

1 stop13h 40m

$180

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/5

8:00 am-10:39 am

Nonstop4h 39m

Seattle/Tacoma Intl

Thu 4/24

11:59 pm-6:05 am

Nonstop4h 06m

$192

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 4/3

7:00 am-1:59 pm

1 stop8h 59m

Seattle/Tacoma Intl

Tue 4/8

11:45 pm-5:46 am

Nonstop4h 01m

$205

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Tue 4/8

7:25 am-2:16 pm

1 stop8h 51m

Seattle/Tacoma Intl

Tue 4/15

4:16 pm-5:23 am

1 stop11h 07m

$241

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 3/14

7:45 am-10:28 am

Nonstop4h 43m

Seattle/Tacoma Intl

Mon 3/17

6:03 pm-11:59 pm

Nonstop3h 56m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/24

Showing 1-10 of 25 results
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2
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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 February.
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
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
FlightsMojoPrice Accuracy-Trust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust 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.

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.

Travel insights for flights from Chicago to Seattle

Get recent, data-driven insights about flights from Chicago to Seattle including ideal travel times, pricing trends, and more.

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 February 25, 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 February 25, 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 February 23, 2025.

Travelers seeking maximum savings on their Chicago to Seattle flight should consider departing on Tuesday 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 February 25, 2025.

The most flights from CHI to SEA are scheduled on a Monday (39 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 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 February 25, 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.

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

8.0
Very good

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.6

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 27 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 $168 on this airline. Additional options worth looking into are Spirit Airlines and American Airlines, starting at $168 and $169 round-trip. Southwest 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 Frontier, which is currently one of the cheapest options available, starting at $86. Spirit Airlines flights start at $88 while deals on United Airlines start at $90 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 (81%), Royal Jordanian (81%) or Turkish Airlines (75%) 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 $89. While the most popular route (Chicago O'Hare Intl - Seattle/Tacoma Intl) can be booked for $97 on average our data indicates $647 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
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Olympia
Cle Elum
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Shelton
Silverdale
Redmond

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Chicago to Seattle

Discover the top 7 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 February 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$223FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$121Average$239FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$127Average$305FlexibilityNo cancel feeOn-time75%
DeltaCheapest$130Average$399FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$149Average$334FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$159Average$323FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$188Average$345FlexibilityNo cancel feeOn-time63%
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