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$304+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$304
(American Airlines)

Popular in

July

Cheapest in

November

Average price

$402
From Champaign University-Willard to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 19% potential increase in price ($109 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/9. 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 10/87:01 pmCMI - SEA
1 stop7h 26mAmerican Airlines
Sat 10/116:10 amSEA - CMI
1 stop7h 44mAmerican Airlines
Deal found 9/9$304
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 10/211:17 amCMI - SEA
1 stop8h 12mAmerican Airlines
Wed 10/810:39 amSEA - CMI
1 stop9h 03mAmerican Airlines
Deal found 9/9$305
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 11/206:45 amCMI - SEA
1 stop8h 24mAmerican Airlines
Mon 11/2412:59 amSEA - CMI
1 stop7h 46mAmerican Airlines
Deal found 9/11$356
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 11/156:45 amCMI - SEA
1 stop10h 03mAmerican Airlines
Tue 11/185:24 amSEA - CMI
1 stop7h 17mAmerican Airlines
Deal found 9/9$394
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 11/206:45 amCMI - SEA
1 stop8h 24mAmerican Airlines
Wed 11/2611:42 amSEA - CMI
1 stop5h 58mAmerican Airlines
Deal found 9/11$416
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 11/2111:16 amCMI - SEA
1 stop6h 43mAmerican Airlines
Wed 11/2611:42 amSEA - CMI
1 stop5h 58mAmerican Airlines
Deal found 9/11$551
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 11/2111:16 amCMI - SEA
1 stop6h 43mAmerican Airlines
Mon 11/2412:59 amSEA - CMI
1 stop7h 46mAmerican Airlines
Deal found 9/11$581
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/87:00 amCMI - SEA
1 stop15h 46mAmerican Airlines
Fri 10/102:52 pmSEA - CMI
1 stop17h 51mAmerican Airlines
Deal found 9/10$582

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 September 11, 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 10/8

7:01 pm-12:27 am

1 stop7h 26m

Seattle/Tacoma Intl

Sat 10/11

6:10 am-3:54 pm

1 stop7h 44m

$304

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Thu 10/2

11:17 am-5:29 pm

1 stop8h 12m

Seattle/Tacoma Intl

Wed 10/8

10:39 am-9:42 pm

1 stop9h 03m

$305

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Sat 11/15

6:45 am-2:48 pm

1 stop10h 03m

Seattle/Tacoma Intl

Tue 11/18

5:24 am-2:41 pm

1 stop7h 17m

$394

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Thu 11/20

6:45 am-1:09 pm

1 stop8h 24m

Seattle/Tacoma Intl

Tue 11/25

11:42 am-7:40 pm

1 stop5h 58m

$405

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Thu 11/20

6:45 am-1:09 pm

1 stop8h 24m

Seattle/Tacoma Intl

Wed 11/26

11:42 am-7:40 pm

1 stop5h 58m

$416

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Fri 11/21

11:16 am-3:59 pm

1 stop6h 43m

Seattle/Tacoma Intl

Mon 11/24

12:59 am-10:45 am

1 stop7h 46m

$581

ChampaignSeattle

CMI - SEA

CMISEA

Champaign University-Willard

Wed 10/8

7:00 am-8:46 pm

1 stop15h 46m

Seattle/Tacoma Intl

Fri 10/10

2:52 pm-10:43 am

1 stop17h 51m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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, January is the cheapest month in which you can book a flight from Champaign to Seattle (average of $238). Flying from Champaign 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.

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 September 11, 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
10,000 reviews

Boarding

7.5

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.2

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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 7h 26m. American Airlines provides one of the quickest options available for as low as $304. 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 $284. Users have found that American Airlines is 35% 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, January is the cheapest month in which you can book a flight from Champaign to Seattle (average of $238). Flying from Champaign 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 Seattle?

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

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Alternative routes for Champaign to Seattle

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$284Average$428FlexibilityNo cancel feeOn-time71%

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