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$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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SEA
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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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 November 26, 2025.

This American Airlines deal was found by Cheapflights users on 11/26. 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 12/106:06 amCMI - SEA
1 stop8h 32mAmerican Airlines
Sat 12/135:18 amSEA - CMI
1 stop7h 18mAmerican Airlines
Deal found 11/26$348
This American Airlines deal was found by Cheapflights users on 11/25. 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.
Wed 12/106:06 amCMI - SEA
2 stops11h 18mAmerican Airlines
Sun 12/1410:34 amSEA - CMI
2 stops8h 56mAmerican Airlines
Deal found 11/25$939

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 November 26, 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
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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 November 26, 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

Wed 12/10

3:16 pm-11:38 pm

1 stop10h 22m

Seattle/Tacoma Intl

Sat 12/13

12:38 am-10:51 am

1 stop8h 13m

$348

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Wed 12/10

6:06 am-12:38 pm

1 stop8h 32m

Seattle/Tacoma Intl

Sat 12/13

5:18 am-2:36 pm

1 stop7h 18m

$348

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Tue 2/17

2:55 pm-11:07 pm

1 stop10h 12m

Seattle/Tacoma Intl

Sat 2/21

5:39 am-2:25 pm

1 stop6h 46m

$497

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Wed 12/10

6:06 am-12:38 pm

1 stop8h 32m

$384

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Fri 12/12

3:16 pm-11:38 pm

1 stop10h 22m

$419

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Thu 12/11

3:16 pm-9:13 pm

1 stop7h 57m

$419

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Sat 1/3

6:52 am-2:54 pm

1 stop10h 02m

$453

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Sat 12/13

6:52 am-8:18 pm

2 stops15h 26m

$510

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

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 November 26, 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
11,038 reviews

Comfort

7.2

Crew

8.0

Overall

7.2

Entertainment

6.9

Food

6.4

Boarding

7.5

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
11,038 reviews
American Airlines
7.2
Good
11,038 reviews

Comfort

7.2

Crew

8.0

Overall

7.2

Entertainment

6.9

Food

6.4

Boarding

7.5

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 8h 32m. 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
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Puyallup
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Kent
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Centralia

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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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$320Average$493FlexibilityNo cancel feeOn-time71%

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