HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$348+ Cheap flights from Champaign to Seattle (CMI - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SEA
dic. 19 — dic. 261
vie. 12/19
vie. 12/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Champaign 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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Champaign to Seattle

Cheapest flights from Champaign to Seattle
Explore the most affordable flight options available from Champaign to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 19, 2025.

This American Airlines deal was found by Cheapflights users on 11/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/46:52 amCMI - SEA
1 stop10h 03mAmerican Airlines
lun. 12/811:22 amSEA - CMI
1 stop6h 16mAmerican Airlines
Deal found 11/19$348
This American Airlines deal was found by Cheapflights users on 11/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/236:00 amCMI - SEA
1 stop9h 54mAmerican Airlines
vie. 11/2811:42 amSEA - CMI
1 stop5h 58mAmerican Airlines
Deal found 11/19$747
This American Airlines deal was found by Cheapflights users on 11/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/226:00 amCMI - SEA
1 stop9h 54mAmerican Airlines
vie. 11/2812:55 amSEA - CMI
1 stop7h 49mAmerican Airlines
Deal found 11/19$843

Cheap flight deals from Champaign to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Champaign (CMI) 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 noviembre 19, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$348
(American Airlines)

Popular in

November

Cheapest in

March

Average price

$1,347
Provider with most accurate pricing for Champaign University-Willard-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Champaign University-Willard-Seattle/Tacoma Intl flights.
Search Deals
From Champaign University-Willard to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 42% potential increase in price ($414 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 18% potential price decrease ($88 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Champaign 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 noviembre 19, 2025.
Use the filters below to find and compare flights from Champaign to Seattle that are best for you.

Fly from

Champaign

Fly to

Seattle

Route

Depart

Return

Price

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

jue. 12/4

6:52 am-2:55 pm

1 stop10h 03m

Seattle/Tacoma Intl

lun. 12/8

11:22 am-7:38 pm

1 stop6h 16m

$348

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

mar. 2/17

2:54 pm-9:16 pm

1 stop8h 22m

Seattle/Tacoma Intl

sáb. 2/21

5:39 am-2:24 pm

1 stop6h 45m

$497

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

sáb. 1/3

6:52 am-2:54 pm

1 stop10h 02m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Compare providers for flights from Champaign 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 Champaign to Seattle in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Champaign-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Champaign-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Champaign-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Champaign-Seattle flights, Cheapflights users trust eDreams the most. eDreams 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 Champaign-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 Champaign to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Champaign 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 Champaign to Seattle

What is the cheapest month to book a flight from Champaign to Seattle?

Currently, October is the cheapest month in which you can book a flight from Champaign to Seattle (average of $239). Flying from Champaign to Seattle in December 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.

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 noviembre 19, 2025.
Get a feel of what it's like to fly with American Airlines from Champaign to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,046 reviews

Entertainment

6.9

Food

6.4

Comfort

7.2

Overall

7.2

Boarding

7.5

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
American Airlines
7.2
Good
11,046 reviews
American Airlines
7.2
Good
11,046 reviews

Entertainment

6.9

Food

6.4

Comfort

7.2

Overall

7.2

Boarding

7.5

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.

Related info for your journey

Find useful and relevant information for your journey from Champaign to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Champaign to Seattle?

    A quick flight from Champaign to Seattle can take about 10h 03m. American Airlines provides one of the quickest options available for as low as $348. There are 1757 mi between Champaign and Seattle.

  • What is the cheapest airline to fly from Champaign to Seattle round-trip?

    Cheapflights users have booked flights from Champaign to Seattle round-trip from $320. Users have found that American Airlines is 42% cheaper than the other options available to this destination.

  • Can I find deals for flights from Champaign to Seattle that include hotel bookings?

    Yes. In addition to deals on Champaign to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Champaign to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Champaign to Seattle.

  • Can I find deals for business class flights from Champaign to Seattle?

    Yes. Cheapflights offers flight deals from Champaign 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 Champaign to Seattle?

    Currently, October is the cheapest month in which you can book a flight from Champaign to Seattle (average of $239). Flying from Champaign to Seattle in December 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Tukwila
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Cle Elum
Marysville
Puyallup
Federal Way
Fife
Issaquah
Aberdeen

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Champaign to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Seattle flights
O'Hare Intl to Portland flights
Midway to Seattle flights
St. Louis to Seattle flights
Midway to Portland flights
St. Louis to Portland flights
O'Hare Intl to Spokane flights
Moline to Seattle flights
Peoria to Seattle flights
Evansville to Seattle flights
Decatur to Seattle flights
Peoria to Portland flights
Bloomington to Seattle flights
St. Louis to Spokane flights
Midway to Spokane flights
O'Hare Intl to Pasco flights
Springfield to Seattle flights
Decatur to Portland flights
St. Louis to Pasco flights
Moline to Spokane flights
Evansville to Portland flights
Moline to Portland flights
O'Hare Intl to Bellingham flights
Bloomington to Portland flights
Midway to Pasco flights
O'Hare Intl to Wenatchee flights
Peoria to Spokane flights
O'Hare Intl to Walla Walla flights
O'Hare Intl to Pullman flights
O'Hare Intl to Yakima flights
Paducah to Seattle flights
Bloomington to Spokane flights
Moline to Pasco flights
Springfield to Portland flights
Springfield to Spokane flights
St. Louis to Yakima flights
Champaign to Portland flights
St. Louis to Pullman flights
Moline to Walla Walla flights
Evansville to Spokane flights
Dubuque to Seattle flights
Dubuque to Portland flights
Springfield to Bellingham flights
Peoria to Pasco flights
Quincy to Seattle flights

Top airline flying from Champaign to Seattle

Discover the top airline that operate flights from Champaign 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 noviembre 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$320Average$493FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.