How does KAYAK find such low prices on flights from Illinois to San Antonio?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Antonio. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Antonio?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to San Antonio?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Antonio?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$75 CHEAP FLIGHTS from Illinois to San Antonio

SAT

KAYAK searches hundreds of travel sites at once for deals on flights to San Antonio

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Flight Deals

Cheap Flights from Illinois to San Antonio

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to San Antonio

Fri, May 1 - Sun, May 3

12:07 pm - 7:30 pm

STL

SAT

7h 23m

1 stop

2:59 pm - 7:32 pm

SAT

STL

28h 33m

1 stop

$160Frontier

Fri, Apr 10 - Sun, Apr 12

8:16 pm - 12:19 am

STL

SAT

28h 03m

1 stop

6:45 am - 9:48 am

SAT

STL

27h 03m

1 stop

$171Frontier

Tue, Mar 24 - Tue, Mar 31

11:27 am - 12:27 pm

STL

SAT

25h 00m

2 stops

6:45 am - 9:48 am

SAT

STL

27h 03m

1 stop

$209Multiple Airlines

Tue, Apr 7 - Sat, Apr 11

10:09 am - 5:43 pm

STL

SAT

7h 34m

1 stop

4:17 pm - 10:28 pm

SAT

STL

6h 11m

1 stop

$212United Airlines

Tue, Mar 24 - Tue, Mar 31

3:45 pm - 10:54 pm

BMI

SAT

7h 09m

1 stop

5:19 am - 11:01 am

SAT

BMI

5h 42m

1 stop

$269American Airlines

Wed, Apr 8 - Sat, Apr 11

2:46 pm - 10:52 pm

BMI

SAT

8h 06m

2 stops

8:15 am - 3:15 pm

SAT

BMI

7h 00m

1 stop

$274American Airlines

Mon, Mar 9 - Wed, Mar 11

8:16 pm - 9:30 am

ORD

SAT

13h 14m

1 stop

6:00 am - 7:47 pm

SAT

ORD

13h 47m

1 stop

$278Spirit Airlines

Sun, Apr 26 - Mon, Apr 27

5:34 pm - 9:11 am

ORD

SAT

15h 37m

1 stop

8:39 pm - 5:50 am

SAT

ORD

9h 11m

1 stop

$279Multiple Airlines

Sun, Apr 26 - Tue, Apr 28

5:34 pm - 9:11 am

ORD

SAT

15h 37m

1 stop

6:00 am - 11:10 pm

SAT

ORD

17h 10m

1 stop

$282Spirit Airlines

Wed, Apr 1 - Sun, Apr 5

7:45 pm - 10:53 pm

ORD

SAT

3h 08mnonstop

5:35 pm - 8:31 pm

SAT

ORD

2h 56mnonstop

$283United Airlines

Useful Info

Low season	January
High season	March
Cheapest flight	$75

Best time to beat the crowds but there is an average 2% increase in price.

Most popular time to fly with an average 9% increase in price.

Flight from Chicago O'Hare Airport to San Antonio

How does KAYAK find such low prices on flights from Illinois to San Antonio?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Antonio.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Antonio?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to San Antonio?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Antonio?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Schertz

Everything you need to know for your flight to San Antonio

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in San Antonio

San Antonio (SAT)

SAT

$75 Find Cheap Flights from Illinois to San Antonio

KAYAK searches hundreds of travel sites at once for deals on flights to San Antonio

Cheap Flights from Illinois to San Antonio

Recent round-trip flight deals from Illinois to San Antonio

Recent one-way flight deals from Illinois to San Antonio

Recent last minute flight deals from Illinois to San Antonio

Recent direct flight deals from Illinois to San Antonio

Good to know

FAQs for booking flights from Illinois to San Antonio

How does KAYAK find such low prices on flights from Illinois to San Antonio?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Antonio.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Antonio?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to San Antonio?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Antonio?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San Antonio?

Everything you need to know for your flight to San Antonio

Information on the airport you'll fly into in San Antonio

Cabin class types available on flights to Illinois

Complete your trip to San Antonio with a hotel stay or car rental

Find direct flights for San Antonio

Flights to other popular destinations

Flights from domestic origins to San Antonio

Choose which airport to fly into in San Antonio

Find deals for your return flight