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$94+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
ene. 28 — feb. 41
mar. 1/28
mar. 2/4
1 adult, Economy
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The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or September, booked 29 days in advance, depart on a Thursday or Wednesday 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 enero 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$178
(Delta)

One-way from

$94
(Cheapflightsfares)

Popular in

July

Cheapest in

February

Average price

$263

Good round-trip deal

$179 or less

Good one-way deal

$85 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
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Highest demand for flights based on searches. 19% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in January 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 enero 23, 2025.

This Delta deal was found by Cheapflights users on 1/22. 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.
mar. 2/187:00 amORD - SEA
Nonstop4h 58mDelta
dom. 2/237:10 amSEA - ORD
Nonstop4h 05mDelta
Deal found 1/22$178
This Trip.com deal was found by Cheapflights users on 1/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/77:15 amMDW - SEA
1 stop9h 10mFrontier
dom. 2/912:10 pmSEA - MDW
1 stop21h 34mFrontier
Deal found 1/22$179
This Trip.com deal was found by Cheapflights users on 1/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/276:50 amORD - SEA
1 stop7h 12mFrontier
dom. 3/211:38 amSEA - ORD
1 stop15h 27mFrontier
Deal found 1/23$179
This Expedia deal was found by Cheapflights users on 1/22. 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.
mar. 2/181:32 pmORD - SEA
1 stop12h 53mMultiple Airlines
jue. 2/206:03 pmSEA - ORD
Nonstop3h 56mMultiple Airlines
Deal found 1/22$180
This Cheapflightsfares deal was found by Cheapflights users on 1/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/11:32 pmORD - SEA
1 stop12h 53mSpirit Airlines
mié. 3/267:57 pmSEA - ORD
1 stop7h 49mSpirit Airlines
Deal found 1/23$181
This American Airlines deal was found by Cheapflights users on 1/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/158:25 pmORD - SEA
Nonstop4h 42mAmerican Airlines
sáb. 3/2211:59 pmSEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 1/23$189
This United Airlines deal was found by Cheapflights users on 1/22. 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.
sáb. 3/14:05 pmORD - SEA
Nonstop4h 40mUnited Airlines
mié. 3/54:58 pmSEA - ORD
1 stop9h 55mUnited Airlines
Deal found 1/22$193
This Alaska Airlines deal was found by Cheapflights users on 1/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/157:00 pmORD - SEA
1 stop15h 15mAlaska Airlines
lun. 2/1711:59 pmSEA - ORD
Nonstop3h 54mAlaska Airlines
Deal found 1/23$219
This Kissandfly.com deal was found by Cheapflights users on 1/22. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/158:44 pmMDW - SEA
1 stop14h 36mMultiple Airlines
sáb. 2/2210:00 amSEA - MDW
3 stops17h 31mMultiple Airlines
Deal found 1/22$229
This Southwest deal was found by Cheapflights users on 1/22. 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.
vie. 2/75:35 pmMDW - SEA
Nonstop4h 35mSouthwest
dom. 2/910:50 amSEA - MDW
Nonstop4h 00mSouthwest
Deal found 1/22$263
This Southwest deal was found by Cheapflights users on 1/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/157:05 pmORD - SEA
1 stop6h 40mSouthwest
sáb. 2/227:00 amSEA - ORD
2 stops9h 30mSouthwest
Deal found 1/23$284
This Sun Country Air deal was found by Cheapflights users on 1/22. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/98:10 pmORD - SEA
1 stop16h 58mSun Country Air
dom. 6/1511:59 pmSEA - ORD
1 stop17h 12mSun Country Air
Deal found 1/22$320

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 enero 23, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

mié. 2/19

7:00 am-9:58 am

Nonstop4h 58m

Seattle/Tacoma Intl

vie. 2/21

5:55 pm-11:56 pm

Nonstop4h 01m

$178

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

jue. 2/27

6:50 am-12:02 pm

1 stop7h 12m

Seattle/Tacoma Intl

dom. 3/2

11:38 am-5:05 am

1 stop15h 27m

$179

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

jue. 2/27

6:40 am-12:02 pm

1 stop7h 22m

Seattle/Tacoma Intl

dom. 3/2

11:38 am-5:31 am

1 stop15h 53m

$180

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

sáb. 3/1

1:32 pm-12:25 am

1 stop12h 53m

Seattle/Tacoma Intl

mié. 3/26

7:57 pm-5:46 am

1 stop7h 49m

$181

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

jue. 3/13

10:48 am-7:02 pm

1 stop10h 14m

Seattle/Tacoma Intl

lun. 3/17

2:02 pm-12:44 am

1 stop8h 42m

$182

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

sáb. 3/29

8:09 pm-10:53 pm

Nonstop4h 44m

Seattle/Tacoma Intl

mié. 4/2

2:18 pm-8:25 pm

Nonstop4h 07m

$196

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

mié. 3/19

8:25 pm-11:07 pm

Nonstop4h 42m

Seattle/Tacoma Intl

lun. 3/24

11:59 pm-5:59 am

Nonstop4h 00m

$198

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

sáb. 2/15

7:05 pm-11:45 pm

1 stop6h 40m

Seattle/Tacoma Intl

sáb. 2/22

5:15 am-6:30 pm

1 stop11h 15m

$206

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

sáb. 2/15

5:56 pm-8:37 pm

Nonstop4h 41m

Seattle/Tacoma Intl

jue. 2/20

11:59 pm-5:53 am

Nonstop3h 54m

$219

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

sáb. 3/1

6:40 am-12:46 pm

1 stop8h 06m

Seattle/Tacoma Intl

lun. 3/10

4:24 pm-3:32 pm

3 stops21h 08m

$250

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 24 results
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Compare providers for flights from Chicago to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Seattle in January.
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*1 star
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
FlightsMojoPrice Accuracy-Trust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy2 starsTrust Score*2 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 January 17, 2025.

The best time to book flights from Chicago to Seattle is 29 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 enero 23, 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 January 21, 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 enero 23, 2025.

The most flights from CHI to SEA are scheduled on a Monday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 enero 23, 2025.
Read through reviews of airlines operating flights from Chicago to Seattle, such as Delta, Frontier and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,647 reviews

Entertainment

7.7

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,647 reviews
Southwest
8.1
Very good
4,647 reviews

Entertainment

7.7

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,699 reviews
Southwest
8.1
Very good
4,647 reviews

Entertainment

7.7

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,508 reviews
Southwest
8.1
Very good
4,647 reviews

Entertainment

7.7

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,970 reviews
Southwest
8.1
Very good
4,647 reviews

Entertainment

7.7

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,647 reviews

Entertainment

7.7

Comfort

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 20 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 Delta. Our recent data shows that you can find tickets from as low as $178 on this airline. Additional options worth looking into are Frontier and Spirit Airlines, starting at $179 and $181 round-trip. Delta is priced at 37% 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 $94. Delta flights start at $94 while deals on Spirit Airlines 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 United Airlines (87%), KLM (85%) or Korean Air (84%) 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 $134 on average our data indicates $806 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
Renton
Tacoma
Lacey
Federal Way
Ocean Shores
Leavenworth
Olympia
Marysville
Centralia
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

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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 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 enero 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$118Average$305FlexibilityNo cancel feeOn-time75%
FrontierCheapest$122Average$222FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$124Average$242FlexibilityNo cancel feeOn-time65%
DeltaCheapest$126Average$409FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$147Average$335FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$157Average$325FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$186Average$400FlexibilityNo cancel feeOn-time63%
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