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$536+ Cheap flights from Champaign to San Antonio (CMI - SAT)

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SAT
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Champaign to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Champaign (CMI) to San Antonio (SAT). 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 August 18, 2025.

Round-trip from

$536
(American Airlines)

Popular in

January

Cheapest in

August

Average price

$366
From Champaign University-Willard to San Antonio
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from Champaign to San Antonio

Cheapest flights from Champaign to San Antonio
Explore the most affordable flight options available from Champaign to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This American Airlines deal was found by Cheapflights users on 8/17. 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.
Sat 9/63:32 pmCMI - SAT
1 stop5h 19mAmerican Airlines
Tue 9/910:19 amSAT - CMI
1 stop4h 40mAmerican Airlines
Deal found 8/17$536
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Mon 9/16:00 amCMI - SAT
1 stop5h 38mAmerican Airlines
Fri 9/58:00 amSAT - CMI
1 stop6h 59mAmerican Airlines
Deal found 8/17$766

Cheapflights Fare Finder

 
Customize your flight search to find flights from Champaign to San Antonio 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 2,558,603 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Champaign to San Antonio that are best for you.

Fly from

Champaign

Fly to

San Antonio

Route

Depart

Return

Price

ChampaignSan Antonio

CMI - SAT

CMISAT

Champaign University-Willard

Sat 9/6

3:32 pm-10:13 pm

1 stop6h 41m

San Antonio

Tue 9/9

10:19 am-2:59 pm

1 stop4h 40m

$536

ChampaignSan Antonio

CMI - SAT

CMISAT

Champaign University-Willard

Mon 9/1

6:00 am-11:38 am

1 stop5h 38m

San Antonio

Fri 9/5

8:00 am-2:59 pm

1 stop6h 59m

$766

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Best time to book a flight from Champaign to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Champaign 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 Champaign to San Antonio

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

Currently, August is the cheapest month in which you can book a flight from Champaign to San Antonio (average of $295). Flying from Champaign to San Antonio in March is currently the most expensive (average of $376). 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 San Antonio

Get insights into the airlines that provide service to San Antonio. 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 San Antonio. Reviews last updated August 18, 2025.
Get a feel of what it's like to fly with American Airlines from Champaign to San Antonio 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

Overall

7.2

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Crew

8.0

Food

6.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Crew

8.0

Food

6.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

Related info for your journey

Find useful and relevant information for your journey from Champaign to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Champaign to San Antonio?

    American Airlines can get you from Champaign to San Antonio in just under 6h 41m. Your travel time can differ by up to . Champaign and San Antonio are separated by a distance of 926 mi.

  • What is the cheapest airline to fly from Champaign to San Antonio round-trip?

    American Airlines, at $346, was found to be the cheapest airline from Champaign to San Antonio.. American Airlines is 30% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Champaign to San Antonio that include hotel bookings?

    Yes. In addition to deals on Champaign to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Champaign to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Champaign to San Antonio.

  • Can I find deals for business class flights from Champaign to San Antonio?

    Yes. Cheapflights offers flight deals from Champaign to San Antonio 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 Champaign to San Antonio?

    Currently, August is the cheapest month in which you can book a flight from Champaign to San Antonio (average of $295). Flying from Champaign to San Antonio in March is currently the most expensive (average of $376). 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.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Top airline flying from Champaign to San Antonio

Discover the top airline that operate flights from Champaign to San Antonio. 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 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$346Average$486FlexibilityNo cancel feeOn-time71%

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