$446+ Cheap flights from St. Louis to Champaign (STL - 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CMI
Oct 11 — Oct 181
Round-trip
1 adult, Economy
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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 St. Louis to Champaign
Cheapest
Best
Last-minute
Cheapest flights from St. Louis to ChampaignExplore the most affordable flight options available from St. Louis to Champaign. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
Explore the most affordable flight options available from St. Louis to Champaign. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
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 10/97:29 am -
1 stop4h 39m
Sun 10/116:00 am -
1 stop4h 50m
Deal found 9/11![American Airlines logo]()
$446
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.
Sat 10/35:18 pm -
1 stop3h 38m
Tue 10/66:48 pm -
1 stop5h 31m
Deal found 9/11![American Airlines logo]()
$456
This American Airlines deal was found by Cheapflights users on 9/8. 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 9/97:26 am -
1 stop5h 27m
Wed 9/165:00 am -
1 stop5h 18m
Deal found 9/8![American Airlines logo]()
$508
Best flights from St. Louis to ChampaignDiscover carefully curated flight deals from St. Louis to Champaign that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
Discover carefully curated flight deals from St. Louis to Champaign that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
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 10/97:29 am -
1 stop4h 39m
Sun 10/116:00 am -
1 stop4h 50m
Deal found 9/11![American Airlines logo]()
$446
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.
Sat 10/35:18 pm -
1 stop3h 38m
Tue 10/66:48 pm -
1 stop5h 31m
Deal found 9/11![American Airlines logo]()
$456
Last-minute flights from St. Louis to ChampaignDiscover last-minute flight deals from St. Louis to Champaign. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Champaign. Data last updated September 11, 2026 and is based on user searches.
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.
Sat 10/35:18 pm -
1 stop3h 38m
Tue 10/66:48 pm -
1 stop5h 31m
Deal found 9/11![American Airlines logo]()
$456
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 10/97:29 am -
1 stop4h 39m
Sun 10/116:00 am -
1 stop4h 50m
Deal found 9/11![American Airlines logo]()
$446
Find flight deals from St. Louis to Champaign
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $446 (American Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis 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 7,457,451 searches. Data last updated September 11, 2026.
Use the filters below to find and compare flights from St. Louis to Champaign that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisChampaign
STL Lambert-St Louis - CMI Champaign University-Willard
STLCMI
Lambert-St Louis
Fri 10/9
7:29 am-12:08 pm
1 stop4h 39m
Champaign University-Willard
Sun 10/11
6:00 am-10:50 am
1 stop4h 50m
$446
Quickest round-trip
St. LouisChampaign
STL Lambert-St Louis - CMI Champaign University-Willard
STLCMI
Lambert-St Louis
Sat 10/3
5:18 pm-8:56 pm
1 stop3h 38m
Champaign University-Willard
Tue 10/6
6:48 pm-12:19 am
1 stop5h 31m
$456
Sorted by cheapest first
- Most accurate provider: When it comes to deals on St. Louis-Champaign flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Champaign flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Champaign flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Champaign 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 St. Louis-Champaign 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 St. Louis to Champaign
Have a flexible travel schedule? Discover the best time to fly to Champaign from St. Louis with our price prediction graph.
STL-CMI
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.
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Champaign. 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 Champaign?
Book flights to Champaign if you plan to visit one of these locationsUrbana
Danville
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