SAT

$68 Find Cheap Flights from Illinois to San Antonio

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to San Antonio departing on 3/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$133
Overall average: $316
Frontier
Sat 2/7Tue 2/10
STL - SAT • 1 stop
Cheapest non-stop
$253
Typical prices: $323-$614
Southwest
Sat 1/31Wed 2/4
MDW - SAT • Non-stop
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Illinois to San Antonio

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to San Antonio that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to San Antonio

Sat, Feb 7 - Tue, Feb 10
Frontier Logo
3:46 pm - 7:29 pm
STL
-
SAT
27h 43m1 stop
Frontier Logo
5:12 pm - 1:58 pm
SAT
-
STL
20h 46m1 stop
$133Frontier
Fri, Mar 6 - Tue, Mar 10
Frontier Logo
8:12 pm - 9:06 am
STL
-
SAT
12h 54m1 stop
Frontier Logo
6:45 am - 9:49 am
SAT
-
STL
27h 04m1 stop
$146Frontier
Thu, Feb 5 - Sat, Feb 7
Multiple Airlines Logo
10:01 pm - 12:25 pm
STL
-
SAT
14h 24m1 stop
Multiple Airlines Logo
6:30 am - 11:33 pm
SAT
-
STL
17h 03m1 stop
$177Multiple Airlines
Tue, Feb 10 - Mon, Feb 16
Southwest Logo
2:15 pm - 9:35 pm
ORD
-
SAT
7h 20m2 stops
Southwest Logo
6:45 am - 12:15 pm
SAT
-
ORD
5h 30m1 stop
$228Southwest
Thu, Feb 19 - Sat, Feb 21
Multiple Airlines Logo
3:00 pm - 8:45 am
MDW
-
SAT
17h 45m2 stops
Multiple Airlines Logo
6:00 am - 2:55 pm
SAT
-
MDW
8h 55m1 stop
$229Multiple Airlines
Fri, Feb 20 - Thu, Feb 26
Spirit Airlines Logo
12:44 pm - 11:59 pm
ORD
-
SAT
11h 15m1 stop
Spirit Airlines Logo
10:26 am - 11:47 pm
SAT
-
ORD
13h 21m1 stop
$233Spirit Airlines
Sat, Feb 21 - Sun, Feb 22
Spirit Airlines Logo
12:44 pm - 11:59 pm
ORD
-
SAT
11h 15m1 stop
Spirit Airlines Logo
6:00 am - 5:46 pm
SAT
-
ORD
11h 46m1 stop
$235Spirit Airlines
Sat, Jan 31 - Wed, Feb 4
Southwest Logo
7:50 pm - 10:50 pm
MDW
-
SAT
3h 00mnonstop
Southwest Logo
2:10 pm - 4:45 pm
SAT
-
MDW
2h 35mnonstop
$253Southwest
Fri, Feb 6 - Tue, Feb 10
Delta Logo
5:11 pm - 12:39 am
MLI
-
SAT
7h 28m1 stop
Delta Logo
4:29 pm - 10:33 pm
SAT
-
MLI
6h 04m1 stop
$279Delta
Wed, Mar 25 - Mon, Mar 30
Delta Logo
5:15 pm - 12:38 am
MLI
-
SAT
7h 23m1 stop
Delta Logo
4:29 pm - 10:30 pm
SAT
-
MLI
6h 01m1 stop
$294Delta
Useful Info

Good to know

Low seasonSeptember
Cheapest flight$68
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Chicago O'Hare Airport to San Antonio

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.

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San Antonio (SAT)