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Champaign

$356+ Cheap flights from Seattle to Champaign (SEA - CMI)

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CMI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Seattle to Champaign

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Champaign (CMI). 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

$356
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$392
From Seattle/Tacoma Intl to Champaign University-Willard
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Highest demand for flights based on searches. 23% potential increase in price ($154 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($37 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 Seattle to Champaign

Cheapest flights from Seattle to Champaign
Explore the most affordable flight options available from Seattle to Champaign. 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 9/11. 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 9/251:02 pmSEA - CMI
1 stop6h 49mAmerican Airlines
Sat 9/277:12 amCMI - SEA
1 stop8h 47mAmerican Airlines
Deal found 9/11$356
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 9/261:02 pmSEA - CMI
1 stop6h 49mAmerican Airlines
Tue 9/303:32 pmCMI - SEA
1 stop7h 51mAmerican Airlines
Deal found 9/11$465
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 10/912:34 amSEA - CMI
1 stop8h 09mAmerican Airlines
Sun 10/127:01 pmCMI - SEA
1 stop7h 26mAmerican Airlines
Deal found 9/9$537
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 9/241:02 pmSEA - CMI
1 stop6h 46mAmerican Airlines
Sun 9/283:32 pmCMI - SEA
1 stop9h 27mAmerican Airlines
Deal found 9/9$695

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Champaign 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 Seattle to Champaign that are best for you.

Fly from

Seattle

Fly to

Champaign

Route

Depart

Return

Price

SeattleChampaign

SEA - CMI

SEACMI

Seattle/Tacoma Intl

Thu 9/25

1:02 pm-9:51 pm

1 stop6h 49m

Champaign University-Willard

Sat 9/27

7:12 am-1:59 pm

1 stop8h 47m

$356

SeattleChampaign

SEA - CMI

SEACMI

Seattle/Tacoma Intl

Fri 9/26

1:02 pm-9:51 pm

1 stop6h 49m

Champaign University-Willard

Tue 9/30

3:32 pm-9:23 pm

1 stop7h 51m

$465

SeattleChampaign

SEA - CMI

SEACMI

Seattle/Tacoma Intl

Thu 10/9

12:34 am-10:43 am

1 stop8h 09m

Champaign University-Willard

Sun 10/12

7:01 pm-12:27 am

1 stop7h 26m

$537

SeattleChampaign

SEA - CMI

SEACMI

Seattle/Tacoma Intl

Wed 9/24

1:02 pm-9:48 pm

1 stop6h 46m

Champaign University-Willard

Sun 9/28

3:32 pm-10:59 pm

1 stop9h 27m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from Seattle to Champaign

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

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

Currently, August is the cheapest month in which you can book a flight from Seattle to Champaign (average of $384). Flying from Seattle to Champaign in June is currently the most expensive (average of $548). 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 Champaign

Get insights into the airlines that provide service to Champaign. 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 Champaign. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with American Airlines from Seattle to Champaign 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

Entertainment

6.9

Food

6.4

Overall

7.2

Comfort

7.2

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Entertainment

6.9

Food

6.4

Overall

7.2

Comfort

7.2

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Champaign. 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 Seattle to Champaign?

    A quick flight from Seattle to Champaign can take about 6h 49m. American Airlines provides one of the quickest options available for as low as $356. There are 1757 mi between Seattle and Champaign.

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

    According to our current data, American Airlines ($220), offers the cheapest pricing from Seattle to Champaign. You may be able to fly from Seattle to Champaign for 56% less than the average price by searching for this airline.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Seattle to Champaign (average of $384). Flying from Seattle to Champaign in June is currently the most expensive (average of $548). 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 Champaign?

Book flights to Champaign if you plan to visit one of these locations
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Top airline flying from Seattle to Champaign

Discover the top airline that operate flights from Seattle to Champaign. 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$220Average$567FlexibilityNo cancel feeOn-time71%

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