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

According to our current data, American Airlines ($458), offers the cheapest pricing from Seattle to Champaign. You may be able to fly from Seattle to Champaign for 12% less than the average price by searching for this airline.

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

Travelers seeking maximum savings on their Seattle to Champaign flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Champaign ranges from 2.0 - 4.2 inches per month. May is typically the wettest month, when rainfall can reach 4.2 in. February is typically the driest time to visit Champaign when rainfall is around 2.0 in.

If weather is an important factor for your trip to Champaign, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

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

Wednesday is generally a great day to depart. Flying on this day could help you save up to 51%.

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

October is one of the best times of the year to fly to Champaign from Seattle. Prices for October average $523 per person but you can even find prices for as low as $188. The most expensive prices can be found in the month of December. Opting for a October flight can save you 67% on your journey compared to booking in December

What is the cheapest time of day to fly from SEA to CMI?

It’s typically best to fly out from Seattle to Champaign in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying at noon, which is usually more expensive.

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.

$364+ Flights from Seattle to Champaign

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Cheap flight deals from Seattle to Champaign

Round-trip from	$458 (American Airlines)
One-way from	$364 (American Airlines)
Popular in	December
Cheapest in	October
Average price	$547

From Seattle/Tacoma Intl to Champaign University-Willard

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One-way flight from Seattle/Tacoma Intl to Champaign University-Willard

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Highest demand for flights based on searches. 20% potential increase in price ($136 potential increase over avg. RT price).

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Cheapest flight prices on average. 7% potential price decrease ($36 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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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 July 8, 2025.

Wed 7/235:15 amSEA - CMI

1 stop7h 35mAmerican Airlines

Sun 7/272:51 pmCMI - SEA

1 stop7h 34mAmerican Airlines

Deal found 7/8

$458

Best flights from Seattle to Champaign
Discover carefully curated flight deals from Seattle to Champaign that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 8, 2025.

Wed 7/235:15 amSEA - CMI

1 stop7h 35mAmerican Airlines

Sun 7/272:51 pmCMI - SEA

1 stop7h 34mAmerican Airlines

Deal found 7/8

$458

Last-minute flights from Seattle to Champaign
Discover last-minute flight deals from Seattle to Champaign. Data last updated July 8, 2025 and is based on user searches.

Wed 7/235:15 amSEA - CMI

1 stop7h 35mAmerican Airlines

Sun 7/272:51 pmCMI - SEA

1 stop7h 34mAmerican Airlines

Deal found 7/8

$458

One-way flights from Seattle to Champaign
Search for one-way flight options from Seattle to Champaign. Find affordable one-way fares based on user searches. Data last updated July 8, 2025.

Sat 8/235:25 amSEA - CMI

1 stop7h 51mAmerican Airlines

Deal found 7/8

$364

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Champaign that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleChampaign

SEA - CMI

SEACMI

Seattle/Tacoma Intl

Wed 7/23

5:15 am-2:50 pm

1 stop7h 35m

Champaign University-Willard

Sun 7/27

2:51 pm-8:25 pm

1 stop7h 34m

$458

SeattleChampaign

SEA - CMI

SEACMI

Seattle/Tacoma Intl

Sat 8/23

5:25 am-3:16 pm

1 stop7h 51m

$364

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

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 $549). 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 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

Reviews

1 / 20

2.0

Mediocre

Anonymous,Oct 2024

LAX - ORD

The seats are just SO UNCOMFORTABLE it completely ruins the experience, especially on a redeye. I was so exhausted but couldn’t sleep a wink because it was just so incredibly uncomfortable. I don’t know who designs airplane seats, but they’re curved forward, forcing your body into a slouching position. Please. Please please get new seats. Also ones that actually extent to the bulkhead so that when you try to lean against the wall, you don’t just fall through the gap

American Airlines

7.2

Good

10,000 reviews

American Airlines

7.2

Good

10,000 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Oct 2024

LAX - ORD

Related info for your journey

What is the cheapest airline to fly from Seattle to Champaign round-trip?
According to our current data, American Airlines ($458), offers the cheapest pricing from Seattle to Champaign. You may be able to fly from Seattle to Champaign for 12% 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 $549). 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.

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Top airline flying from Seattle to Champaign

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$220	Average$543	FlexibilityNo cancel fee	On-time71%

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$364+ Cheap flights from Seattle to Champaign (SEA - CMI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Champaign with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Champaign

Round-trip from

One-way from

Popular in

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Find flight deals from Seattle to Champaign

Cheapest flights from Seattle to ChampaignExplore 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 July 8, 2025.

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 July 8, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Champaign that are best for you.

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.

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?

Reviews of airlines servicing Champaign

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.

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.

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

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

How can I find direct flights from Seattle to Champaign?

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

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

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Alternative routes for Seattle to Champaign

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Top airline flying from Seattle to Champaign

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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 July 8, 2025.