SAT

$76 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 4/23. 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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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

Wed, May 6 - Sun, May 10
Frontier Logo
6:51 pm - 8:14 pm
STL
-
SAT
25h 23m
1 stop
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
$151Frontier
Wed, May 6 - Tue, May 12
Frontier Logo
6:51 pm - 8:14 pm
STL
-
SAT
25h 23m
1 stop
Frontier Logo
8:59 pm - 6:06 pm
SAT
-
STL
21h 07m
1 stop
$171Frontier
Wed, Apr 22 - Wed, Apr 29
Southwest Logo
1:25 pm - 5:20 pm
STL
-
SAT
3h 55m
1 stop
Southwest Logo
7:00 am - 1:00 pm
SAT
-
STL
6h 00m
1 stop
$185Southwest
Wed, May 6 - Tue, May 12
Southwest Logo
1:25 pm - 5:20 pm
STL
-
SAT
3h 55m
1 stop
Southwest Logo
12:30 pm - 5:55 pm
SAT
-
STL
5h 25m
2 stops
$186Southwest
Sat, May 23 - Wed, May 27
Delta Logo
7:05 pm - 12:44 am
STL
-
SAT
5h 39m
1 stop
Delta Logo
6:10 pm - 11:21 pm
SAT
-
STL
5h 11m
1 stop
$203Delta
Thu, Apr 16 - Tue, May 19
Delta Logo
6:00 am - 11:21 am
STL
-
SAT
5h 21m
1 stop
Delta Logo
6:50 am - 12:22 pm
SAT
-
STL
5h 32m
1 stop
$208Delta
Sun, Apr 12 - Wed, Apr 15
Multiple Airlines Logo
12:00 pm - 9:27 am
ORD
-
SAT
21h 27m
1 stop
Multiple Airlines Logo
4:49 pm - 9:50 am
SAT
-
ORD
17h 01m
1 stop
$288Multiple Airlines
Sat, Apr 11 - Sat, Apr 18
Spirit Airlines Logo
5:05 am - 9:27 am
ORD
-
SAT
28h 22m
1 stop
Spirit Airlines Logo
6:00 am - 12:24 am
SAT
-
ORD
18h 24m
1 stop
$289Spirit Airlines
Sat, Apr 25 - Thu, Apr 30
Multiple Airlines Logo
1:27 pm - 11:51 pm
ORD
-
SAT
10h 24m
1 stop
Multiple Airlines Logo
3:00 pm - 4:02 pm
SAT
-
ORD
25h 02m
2 stops
$291Multiple Airlines
Tue, Apr 7 - Sat, Apr 11
Spirit Airlines Logo
4:36 pm - 9:27 am
ORD
-
SAT
16h 51m
1 stop
Spirit Airlines Logo
10:22 am - 11:17 pm
SAT
-
ORD
12h 55m
1 stop
$294Spirit Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$76
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 4% increase in price.
Flight from St. Louis 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.

Traveling to a place near San Antonio?

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Everything you need to know for your flight to San Antonio

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

San Antonio (SAT)