$281 Cheap Flights from San Antonio (SAT) to Champaign (CMI)

View $281 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)

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

Prices were available within the past 7 days and start at $281 for one-way flights and $436 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Dec 31 - Wed, Jan 14
SAT
San Antonio
CMI
Champaign
$436 Roundtrip, found 15 hours ago
$436
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Wed, Dec 31 from San Antonio to Champaign, returning Wed, Jan 14, priced at $436 found 15 hours ago
American Airlines
Sun, Dec 28 - Wed, Jan 14
SAT
San Antonio
CMI
Champaign
$442 Roundtrip, found 15 hours ago
$442
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sun, Dec 28 from San Antonio to Champaign, returning Wed, Jan 14, priced at $442 found 15 hours ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
SAT
San Antonio
CMI
Champaign
$456 Roundtrip, found 23 hours ago
$456
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Tue, Nov 25 from San Antonio to Champaign, returning Tue, Dec 2, priced at $456 found 23 hours ago
American Airlines
Mon, Nov 24 - Thu, Dec 11
SAT
San Antonio
CMI
Champaign
$466 Roundtrip, found 15 hours ago
$466
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Mon, Nov 24 from San Antonio to Champaign, returning Thu, Dec 11, priced at $466 found 15 hours ago
American Airlines
Thu, Dec 18 - Sat, Jan 3
SAT
San Antonio
CMI
Champaign
$472 Roundtrip, found 15 hours ago
$472
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu, Dec 18 from San Antonio to Champaign, returning Sat, Jan 3, priced at $472 found 15 hours ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
SAT
San Antonio
CMI
Champaign
$476 Roundtrip, found 23 hours ago
$476
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Tue, Nov 25 from San Antonio to Champaign, returning Tue, Dec 2, priced at $476 found 23 hours ago
American Airlines
Thu, Nov 20 - Sun, Nov 23
SAT
San Antonio
CMI
Champaign
$486 Roundtrip, found 6 days ago
$486
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Nov 20 from San Antonio to Champaign, returning Sun, Nov 23, priced at $486 found 6 days ago
American Airlines
Sun, Nov 23 - Thu, Dec 11
SAT
San Antonio
CMI
Champaign
$496 Roundtrip, found 15 hours ago
$496
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sun, Nov 23 from San Antonio to Champaign, returning Thu, Dec 11, priced at $496 found 15 hours ago
American Airlines
Sat, Nov 15 - Fri, Dec 5
SAT
San Antonio
CMI
Champaign
$497 Roundtrip, found 15 hours ago
$497
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sat, Nov 15 from San Antonio to Champaign, returning Fri, Dec 5, priced at $497 found 15 hours ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
SAT
San Antonio
CMI
Champaign
$499 Roundtrip, found 5 days ago
$499
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Nov 25 from San Antonio to Champaign, returning Tue, Dec 2, priced at $499 found 5 days ago

Alternative airports near Champaign

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to University Of Illinois Urbana-Champaign Williard CMI. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $497
CMI
University Of Illinois Urbana-Champaign Williard
CheapestClosest
Average driving time to city center11 min
Flights from $497

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 $281 or cheap return flight from $436 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 December, 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

Origin airport
San Antonio Intl.
Destination airport
University Of Illinois Urbana-Champaign Williard
Airlines serving
American Airlines
Roundtrip price
$436
Distance
927 mi

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 December. 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 $281 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

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*Available to One Key members.