$430+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SEA
Oct 22 — Oct 291
Round-trip
1 adult, Economy
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Find cheap flights from Champaign to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Champaign to Seattle
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Cheapest flights from Champaign to SeattleExplore 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 22, 2026.
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 22, 2026.
This American Airlines deal was found by Cheapflights users on 9/20. 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 10/217:11 am -
1 stop9h 41m
Wed 10/2812:04 pm -
1 stop7h 59m
Deal found 9/20![American Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 9/19. 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 11/116:50 pm -
1 stop7h 45m
Sun 11/155:10 am -
1 stop6h 52m
Deal found 9/19![American Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 9/21. 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.
Tue 10/66:48 pm -
1 stop7h 48m
Sat 10/106:12 am -
1 stop6h 44m
Deal found 9/21![American Airlines logo]()
$510
This American Airlines deal was found by Cheapflights users on 9/19. 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 12/196:43 pm -
1 stop7h 04m
Sat 1/1610:25 am -
1 stop8h 09m
Deal found 9/19![American Airlines logo]()
$524
This American Airlines deal was found by Cheapflights users on 9/17. 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 9/236:41 pm -
1 stop7h 30m
Mon 9/2810:17 am -
1 stop9h 29m
Deal found 9/17![American Airlines logo]()
$580
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/86:48 pm -
1 stop7h 48m
Mon 10/125:00 am -
1 stop7h 07m
Deal found 9/17![American Airlines logo]()
$650
This American Airlines deal was found by Cheapflights users on 9/19. 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.
Sun 10/47:16 am -
1 stop9h 35m
Thu 10/810:26 am -
1 stop9h 37m
Deal found 9/19![American Airlines logo]()
$946
This American Airlines deal was found by Cheapflights users on 9/18. 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 11/197:11 am -
1 stop9h 40m
Sat 11/2810:33 am -
1 stop7h 45m
Deal found 9/18![American Airlines logo]()
$957
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/27:16 am -
2 stops10h 41m
Tue 10/65:00 am -
1 stop7h 07m
Deal found 9/17![American Airlines logo]()
$986
Best flights from Champaign to SeattleDiscover carefully curated flight deals from Champaign to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
Discover carefully curated flight deals from Champaign to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
This American Airlines deal was found by Cheapflights users on 9/19. 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 11/116:50 pm -
1 stop7h 45m
Sun 11/155:10 am -
1 stop6h 52m
Deal found 9/19![American Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/21:23 pm -
1 stop10h 13m
Tue 10/610:31 am -
1 stop7h 54m
Deal found 9/17![American Airlines logo]()
$580
This American Airlines deal was found by Cheapflights users on 9/21. 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 10/86:48 pm -
1 stop7h 48m
Mon 10/125:00 am -
1 stop7h 07m
Deal found 9/21![American Airlines logo]()
$650
This American Airlines deal was found by Cheapflights users on 9/20. 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.
Mon 10/512:38 pm -
1 stop9h 37m
Fri 10/912:04 pm -
1 stop7h 59m
Deal found 9/20![American Airlines logo]()
$946
This American Airlines deal was found by Cheapflights users on 9/21. 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 11/197:11 am -
1 stop9h 40m
Sat 11/2810:33 am -
1 stop7h 45m
Deal found 9/21![American Airlines logo]()
$957
Last-minute flights from Champaign to SeattleDiscover last-minute flight deals from Champaign to Seattle. Data last updated September 22, 2026 and is based on user searches.
Discover last-minute flight deals from Champaign to Seattle. Data last updated September 22, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/17. 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 9/236:41 pm -
1 stop7h 30m
Mon 9/2810:17 am -
1 stop9h 29m
Deal found 9/17![American Airlines logo]()
$580
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/27:16 am -
2 stops10h 41m
Tue 10/65:00 am -
1 stop7h 07m
Deal found 9/17![American Airlines logo]()
$986
This American Airlines deal was found by Cheapflights users on 9/19. 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.
Sun 10/47:16 am -
1 stop9h 35m
Thu 10/810:26 am -
1 stop9h 37m
Deal found 9/19![American Airlines logo]()
$946
This American Airlines deal was found by Cheapflights users on 9/21. 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.
Tue 10/66:48 pm -
1 stop7h 48m
Sat 10/106:12 am -
1 stop6h 44m
Deal found 9/21![American Airlines logo]()
$510
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/86:48 pm -
1 stop7h 48m
Mon 10/125:00 am -
1 stop7h 07m
Deal found 9/17![American Airlines logo]()
$650
This American Airlines deal was found by Cheapflights users on 9/20. 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 10/217:11 am -
1 stop9h 41m
Wed 10/2812:04 pm -
1 stop7h 59m
Deal found 9/20![American Airlines logo]()
$430
One-way flights from Champaign to SeattleSearch for one-way flight options from Champaign to Seattle. Find affordable one-way fares based on user searches. Data last updated September 22, 2026.
Search for one-way flight options from Champaign to Seattle. Find affordable one-way fares based on user searches. Data last updated September 22, 2026.
This American Airlines deal was found by Cheapflights users on 9/17. 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.
Sun 9/276:00 am -
1 stop8h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![American Airlines logo]()
$473
Find 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 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $430 (American Airlines) |
Popular in | March |
Cheapest in | August |
Average price | $489 |
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 7,457,451 searches. Data last updated September 22, 2026.
Use the filters below to find and compare flights from Champaign to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
ChampaignSeattle
CMI Champaign University-Willard - SEA Seattle/Tacoma Intl
CMISEA
Champaign University-Willard
Sun 9/27
6:00 am-12:50 pm
1 stop8h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$473
ChampaignSeattle
CMI Champaign University-Willard - SEA Seattle/Tacoma Intl
CMISEA
Champaign University-Willard
Wed 11/11
6:50 pm-12:35 am
1 stop7h 45m
Seattle/Tacoma Intl
Sun 11/15
5:10 am-2:02 pm
1 stop6h 52m
$494
ChampaignSeattle
CMI Champaign University-Willard - SEA Seattle/Tacoma Intl
CMISEA
Champaign University-Willard
Fri 10/2
1:23 pm-9:36 pm
1 stop10h 13m
Seattle/Tacoma Intl
Tue 10/6
10:31 am-8:25 pm
1 stop7h 54m
$580
ChampaignSeattle
CMI Champaign University-Willard - SEA Seattle/Tacoma Intl
CMISEA
Champaign University-Willard
Thu 10/8
6:48 pm-12:36 am
1 stop7h 48m
Seattle/Tacoma Intl
Mon 10/12
5:00 am-2:07 pm
1 stop7h 07m
$650
ChampaignSeattle
CMI Champaign University-Willard - SEA Seattle/Tacoma Intl
CMISEA
Champaign University-Willard
Mon 10/5
12:38 pm-8:15 pm
1 stop9h 37m
Seattle/Tacoma Intl
Fri 10/9
12:04 pm-10:03 pm
1 stop7h 59m
$946
ChampaignSeattle
CMI Champaign University-Willard - SEA Seattle/Tacoma Intl
CMISEA
Champaign University-Willard
Thu 11/19
7:11 am-2:51 pm
1 stop9h 40m
Seattle/Tacoma Intl
Sat 11/28
10:33 am-8:18 pm
1 stop7h 45m
$957
Sorted by cheapest first
Compare providers for flights from Champaign to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Champaign to Seattle in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Champaign-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Champaign-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Champaign-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Champaign-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Champaign-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
CMI-SEA
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
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 22, 2026.
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.
Food
6.4
Comfort
7.2
Entertainment
6.8
Crew
7.9
Overall
7.0
Boarding
7.4
Reviews
1 / 20
4.0
OkayElizabeth,Mar 2026
ORD - MIA
Food
6.4
Comfort
7.2
Entertainment
6.8
Crew
7.9
Overall
7.0
Boarding
7.4
Reviews
1 / 20
4.0
OkayElizabeth,Mar 2026
ORD - MIA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
Poulsbo
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Champaign and Seattle flights
Browse other Champaign and Seattle flight options. Last updated on September 22, 2026.
Other flights from Champaign
Browse through other flights departing from Champaign. Flights are based on user searches made on Cheapflights and were last updated on September 22, 2026.
Popular flight searches
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Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 22, 2026.
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 7,457,451 searches. Data last updated September 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$338 | Average$538 | FlexibilityNo cancel fee | On-time71% |