$238 Cheap Flights from San Antonio (SAT) to Champaign (CMI)

View $238 flight on Mon, Nov 3, 2025Opens in a new window

Popular airlines from San Antonio International Airport (SAT) to Champaign, IL (CMI-University Of Illinois Urbana-Champaign Williard)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from San Antonio to Champaign (SAT-CMI)

Prices were available within the past 7 days and start at $238 for one-way flights and $326 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Nov 5 - Wed, Nov 12
SAT
San Antonio
CMI
Champaign
$326 Roundtrip, found 3 days ago
$326
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 5 from San Antonio to Champaign, returning Wed, Nov 12, priced at $326 found 3 days ago
American Airlines
Wed, Nov 5 - Wed, Nov 12
SAT
San Antonio
CMI
Champaign
$376 Roundtrip, found 3 days ago
$376
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 5 from San Antonio to Champaign, returning Wed, Nov 12, priced at $376 found 3 days ago
American Airlines
Wed, Nov 5 - Wed, Nov 12
SAT
San Antonio
CMI
Champaign
$396 Roundtrip, found 3 days ago
$396
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 5 from San Antonio to Champaign, returning Wed, Nov 12, priced at $396 found 3 days ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
SAT
San Antonio
CMI
Champaign
$402 Roundtrip, found 4 days ago
$402
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Nov 25 from San Antonio to Champaign, returning Tue, Dec 2, priced at $402 found 4 days ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
SAT
San Antonio
CMI
Champaign
$406 Roundtrip, found 2 days ago
$406
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Nov 25 from San Antonio to Champaign, returning Tue, Dec 2, priced at $406 found 2 days ago
American Airlines
Wed, Nov 5 - Thu, Nov 13
SAT
San Antonio
CMI
Champaign
$416 Roundtrip, found 3 days ago
$416
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 5 from San Antonio to Champaign, returning Thu, Nov 13, priced at $416 found 3 days ago
American Airlines
Tue, Oct 21 - Fri, Nov 7
SAT
San Antonio
CMI
Champaign
$422 Roundtrip, found 6 days ago
$422
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Oct 21 from San Antonio to Champaign, returning Fri, Nov 7, priced at $422 found 6 days ago
American Airlines
Wed, Nov 5 - Wed, Nov 12
SAT
San Antonio
CMI
Champaign
$426 Roundtrip, found 3 days ago
$426
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 5 from San Antonio to Champaign, returning Wed, Nov 12, priced at $426 found 3 days ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
SAT
San Antonio
CMI
Champaign
$436 Roundtrip, found 5 days ago
$436
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Nov 25 from San Antonio to Champaign, returning Tue, Dec 2, priced at $436 found 5 days ago
American Airlines
Mon, Nov 3 - Thu, Nov 13
SAT
San Antonio
CMI
Champaign
$436 Roundtrip, found 3 days ago
$436
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Nov 3 from San Antonio to Champaign, returning Thu, Nov 13, priced at $436 found 3 days ago

Frequently asked questions

How much does a flight from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI) cost?
Get a cheap one-way flight from $238 or cheap return flight from $326 from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI)?
The cheapest month to fly from SAT to CMI is November, when demand is low. Off-peak season is typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SAT to CMI flight.
How many flights per day from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI)?
There aren't any daily nonstop flights available from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SAT to CMI?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on various factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI)?
To reach University Of Illinois Urbana-Champaign Williard Airport (CMI) on time, choose a flight that takes off from San Antonio Intl. Airport (SAT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI) last-minute?
Last-minute bookings from SAT to CMI are generally more expensive. To secure the lowest prices, start searching for flights well in advance. That being said, if you can play around with your travel dates, you may score a cheap ticket right before your journey.
Is it cheaper to book a SAT to CMI flight and hotel package?
Opting for a SAT to CMI flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of hotels and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Antonio Intl. Airport (SAT) to University Of Illinois Urbana-Champaign Williard Airport (CMI)?
In most cases, you can reschedule or cancel your SAT to CMI flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you need further information, visit our Customer Service portal.

Travel information

Travel information

Origin airport
San Antonio Intl.
Destination airport
University Of Illinois Urbana-Champaign Williard
Airlines serving
American Airlines
Roundtrip price
$326
Distance
927 mi

Book with confidence

Book with confidence

San Antonio to Champaign Flights

The cheapest times to fly from San Antonio to Champaign

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Antonio to Champaign are during the month of November. You can find some of the cheapest flights from San Antonio to Champaign with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Antonio to Champaign

Sunday is one of the best days to book for cheap flights from San Antonio to Champaign: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Antonio to Champaign

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Antonio to Champaign in 2025. You can also book with separate airlines for your outbound and return journeys, from $238 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Antonio to Champaign flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Antonio to Champaign airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Antonio to Champaign Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.