SEA - CMI

$338 Find Cheap Flights from Seattle to Champaign - Compare and Save

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Champaign departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Champaign

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Champaign, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Champaign, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$338
American Airlines
Tue 8/18Sat 8/22
SEA - CMI • 1 stop
Cheapest one-way
$478
American Airlines
Fri 6/19
SEA - CMI • 1 stop
Top airlines
Cheapest • from $338 (round-trip)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Champaign. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $519 (round-trip)
Shortest trip • 7h 19m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Champaign!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Champaign (SEA-CMI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Champaign that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Champaign

Tue, Aug 18 - Sat, Aug 22
American Airlines Logo
5:00 am - 2:15 pm
SEA
-
CMI
7h 15m
1 stop
American Airlines Logo
6:36 pm - 12:13 am
CMI
-
SEA
7h 37m
1 stop
$338American Airlines
Wed, Jul 1 - Tue, Jul 7
American Airlines Logo
5:10 am - 2:15 pm
SEA
-
CMI
7h 05m
1 stop
American Airlines Logo
6:36 pm - 12:52 am
CMI
-
SEA
8h 16m
1 stop
$409American Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
2:15 pm - 12:05 am
SEA
-
CMI
7h 50m
1 stop
United Airlines Logo
6:30 am - 11:40 am
CMI
-
SEA
7h 10m
1 stop
$438United Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
2:15 pm - 12:05 am
SEA
-
CMI
7h 50m
1 stop
United Airlines Logo
9:49 am - 8:48 pm
CMI
-
SEA
12h 59m
2 stops
$444United Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
5:30 pm - 8:54 am
SEA
-
CMI
13h 24m
2 stops
United Airlines Logo
9:49 am - 8:48 pm
CMI
-
SEA
12h 59m
2 stops
$449United Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
6:51 pm - 8:54 am
SEA
-
CMI
12h 03m
2 stops
United Airlines Logo
9:49 am - 11:21 pm
CMI
-
SEA
15h 32m
3 stops
$454United Airlines
Fri, Aug 7 - Sun, Aug 9
American Airlines Logo
5:00 am - 2:15 pm
SEA
-
CMI
7h 15m
1 stop
American Airlines Logo
2:47 pm - 10:17 pm
CMI
-
SEA
9h 30m
1 stop
$528American Airlines
Thu, Jul 2 - Tue, Jul 7
American Airlines Logo
10:22 am - 9:59 pm
SEA
-
CMI
9h 37m
1 stop
American Airlines Logo
6:36 pm - 12:52 am
CMI
-
SEA
8h 16m
1 stop
$529American Airlines
Thu, Jul 2 - Wed, Jul 8
American Airlines Logo
11:56 pm - 11:07 am
SEA
-
CMI
9h 11m
1 stop
American Airlines Logo
6:36 pm - 12:52 am
CMI
-
SEA
8h 16m
1 stop
$550American Airlines
Sun, Jun 28 - Sat, Aug 15
American Airlines Logo
6:00 am - 6:12 pm
SEA
-
CMI
10h 12m
1 stop
American Airlines Logo
6:36 pm - 12:13 am
CMI
-
SEA
7h 37m
1 stop
$595American Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Champaign flights

Get data-powered insights and trends into flights from Seattle to Champaign to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Champaign?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Champaign departing in August.

What is the cheapest month to fly from Seattle to Champaign?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Champaign, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Champaign is April, where tickets cost $0 (return) on average. On the other hand, the most expensive months are May and December, where the average cost of round-trip tickets is $706 and $644 respectively.

Good to know

Low seasonSeptember
Cheapest flight$338
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Seattle to Champaign

When to book flights from Seattle to Champaign

Are your dates flexible? Find out the best times to travel from Seattle to Champaign based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Champaign

  • What is the cheapest flight from Seattle to Champaign?

    In the last 5 days, the lowest price for a flight from Seattle to Champaign was $478 for a one-way ticket and $338 for a round-trip.

  • Do I need a passport to fly between Seattle and Champaign?

    No, a passport isn't needed to fly from Seattle to Champaign. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Seattle to Champaign?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Champaign?

    oneworld is the only airline alliance operating flights between Seattle and Champaign.

  • How does KAYAK find such low prices on flights from Seattle to Champaign?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Champaign.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Champaign?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Champaign from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Champaign?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Champaign with an airline and back to Seattle with another airline. Booking your flights between Seattle and CMI can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Champaign?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Champaign from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Champaign

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Champaign. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Champaign? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11635 reviews
7.2Comfort
6.9Entertainment
7.9Crew
6.4Food
7.5Boarding
Airline reviews

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

4.0 OkayAnonymous, Jun 2026
DEN - ORD
Read more American Airlines reviews

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight from LA to Chicago was smooth and service was very good overall.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

They lost my baggage and I am still struggling to the information and update

Requested early boarding to disinfect seat, tray table, etc. before general boarding. Instructed to board after wheelchair passengers. Waited on jet bridge behind 12 wheelchair passengers. Stopped immediately after entering plane to wait for gate agent in rear of plane cleaning a seat that was wet, got to my row and found both seats adjacent to mine already occupied, with the lack of room making it impossible for me to clean my own space and defeating the purpose of my boarding early. Cleaned the armrests and tray table as best I could.

The wifi experience is awful. I had to try again and again, taking over 30 minutes, to connect to the wifi. I had to watch the same two ads over and over until I was finally successful. Once connected, it was anything but "high speed" and disconnected at least three times during the flight.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

Everything you need to know for your flight from Seattle to Champaign

Information on your arrival and departure airports