SEA - CMI

$399 Find Cheap Flights from Seattle to Champaign

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Champaign departing on 7/7. 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

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
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Flights 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, Jul 1 - Sat, Jul 5
American Airlines Logo
6:24 am - 2:16 pmSEA-CMI
5h 52m1 stop
American Airlines Logo
6:00 am - 12:33 pmCMI-SEA
8h 33m1 stop
$467American Airlines
Find Deal
Fri, Jul 25 - Mon, Jul 28
American Airlines Logo
5:15 am - 2:50 pmSEA-CMI
7h 35m1 stop
American Airlines Logo
2:51 pm - 8:25 pmCMI-SEA
7h 34m1 stop
$547American Airlines
Find Deal
Sat, Jul 12 - Mon, Jul 14
American Airlines Logo
10:09 am - 9:45 pmSEA-CMI
9h 36m1 stop
American Airlines Logo
2:51 pm - 8:25 pmCMI-SEA
7h 34m1 stop
$563American Airlines
Find Deal
Mon, Jun 30 - Sat, Jul 5
American Airlines Logo
12:05 am - 2:16 pmSEA-CMI
12h 11m1 stop
American Airlines Logo
6:00 am - 2:23 pmCMI-SEA
10h 23m1 stop
$627American Airlines
Find Deal
Thu, Jul 24 - Mon, Jul 28
American Airlines Logo
12:59 am - 2:50 pmSEA-CMI
11h 51m1 stop
American Airlines Logo
3:20 pm - 12:43 amCMI-SEA
11h 23m1 stop
$695American Airlines
Find Deal
Sun, Jun 29 - Thu, Jul 3
American Airlines Logo
10:54 am - 8:44 pmSEA-CMI
7h 50m1 stop
American Airlines Logo
5:54 am - 12:38 pmCMI-SEA
8h 44m1 stop
$798American Airlines
Find Deal
Mon, Jun 30 - Sat, Jul 5
American Airlines Logo
1:22 am - 2:16 pmSEA-CMI
10h 54m2 stops
American Airlines Logo
6:00 am - 12:33 pmCMI-SEA
8h 33m1 stop
$855American Airlines
Find Deal
Fri, Jul 25 - Mon, Jul 28
American Airlines Logo
11:55 pm - 2:21 pmSEA-CMI
12h 26m1 stop
American Airlines Logo
2:51 pm - 11:02 pmCMI-SEA
10h 11m2 stops
$864American Airlines
Find Deal
Sat, Jul 12 - Mon, Jul 14
American Airlines Logo
10:09 am - 9:45 pmSEA-CMI
9h 36m1 stop
American Airlines Logo
2:51 pm - 11:02 pmCMI-SEA
10h 11m2 stops
$883American Airlines
Find Deal
Fri, Jul 11 - Mon, Jul 14
American Airlines Logo
12:59 am - 2:50 pmSEA-CMI
11h 51m1 stop
American Airlines Logo
3:20 pm - 12:43 amCMI-SEA
11h 23m1 stop
$903American Airlines
Find Deal
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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.

What’s the cheapest day of the week to fly from Seattle to Champaign?

The average price of all round-trip flights from Seattle to Champaign clicked on KAYAK for each day over the last 12 months.

When flying from Seattle to Champaign, you should consider leaving on a Thursday and avoid Tuesdays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Saturdays and the most expensive ones on Fridays.

Good to know

Low seasonOctober
High seasonAugust
Cheapest flight$399
Best time to beat the crowds with an average 43% drop in price.
Most popular time to fly and prices are also 1% lower on average.
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 3 days, the lowest price for a flight from Seattle to Champaign was $399 for a one-way ticket and $467 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.

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.
7.2
American AirlinesOverall score based on 10000 reviews
6.5Food
7.5Boarding
7.2Comfort
8.0Crew
6.9Entertainment
Airline reviews

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

2.0 MediocreAnna Maria, Jun 2025PHL - ORD
Read more American Airlines reviews

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

The flight was 2 hour delayed, otherwise everything was excellent. The delay was due to the hourly limit requirement so given that as a reason, I'm happy with the flight!

Not sure the logic of the boarding in Groups. I was loaded first on the aisle. Then the guy in the middle. Then the guy by the window. Constantly holding up the other people boarding behind them with us blocking the aisle and this happened in most of the other rows

To start, I’d like to say that every American Airline personnel I interacted with on the ground, especially flight crew, was very friendly and did their best to help me out. Despite this, however, my experience with the airline was an entire mess. The 7:19 PM flight was heavily delayed due to weather, and pushed to 10:30 AM the next morning. Because of this, I had to spend the night inside of the airport. At some point later in the night, I got an email saying that the flight had been canceled. I called the support number, and the representative on the other line told me that the flight was still on and that I didn’t need to rebook. The next morning, no one came to the gate to open the door for the crew until almost 11 AM. By this time the flight crew had been waiting for over an hour, and they had called management to get someone to open the door for them multiple times. Around 11:30, the gate screen had changed to a different flight. I ended up buying a last minute ticket with Southwest airline just to get to Chicago, because the next flight with American wasn’t until 7:19 pm that day. Now, earlier that morning my suitcase had been sent ahead of me to ORD. I went to baggage claim to ask them if I could have my suitcase forwarded to where I was staying. The representative at SDF baggage claim said they could and put the claim in for me. As I was going back through TSA, I got an email that the airline had found my suitcase, but the next step was to send it BACK to SDF. I called the airline support number again, and I made it clear that my suitcase needed to stay in Chicago and to not come back to SDF. The representative told me that they would hold my suitcase at ORD and that it wasn’t going to be forwarded anywhere. Once I got there, I found that they had loaded my suitcase onto a plane to send it back to SDF. Thankfully, I had gotten to the baggage claim counter in time for them to put in a request to bring my suitcase back up. My refund with the airline is processing already, but because of this entire experience and miscommunication at every turn of the way, I will not book with American Airlines in the future.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Crew professional. Easy bag drop off. On time. Good entertainment.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

Everything was great except it became so hot on the plane I couldn’t sleep on my red eye flight. It didn’t really cool down till we started descending.

Per usual, flight status, staff courtesy and professionalism were excellent

Everything was on time, we arrived early, everything worked well.

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

Information on your arrival and departure airports

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