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.

$87 CHEAP FLIGHTS from Illinois 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, Nov 13 - Sun, Nov 15

7:18 pm - 12:33 amSTL Lambert-St Louis-SAT San Antonio

5h 15m1 stop Atlanta Hartsfield-Jackson

6:09 pm - 12:40 amSAT San Antonio-STL Lambert-St Louis

6h 31m1 stop Salt Lake City

$173Delta

Fri, Oct 23 - Mon, Oct 26

7:20 pm - 12:33 amSTL Lambert-St Louis-SAT San Antonio

5h 13m1 stop Atlanta Hartsfield-Jackson

6:24 pm - 11:21 pmSAT San Antonio-STL Lambert-St Louis

4h 57m1 stop Minneapolis St Paul

$173Delta

Fri, Nov 13 - Wed, Nov 18

7:59 pm - 7:25 pmSTL Lambert-St Louis-SAT San Antonio

23h 26m1 stop Denver Intl

8:20 pm - 10:45 amSAT San Antonio-STL Lambert-St Louis

14h 25m1 stop Denver Intl

$225Frontier

Fri, Nov 13 - Tue, Nov 17

7:59 pm - 7:25 pmSTL Lambert-St Louis-SAT San Antonio

23h 26m1 stop Denver Intl

8:20 pm - 3:23 pmSAT San Antonio-STL Lambert-St Louis

19h 03m1 stop Denver Intl

$227Frontier

Tue, Jan 5 - Tue, Jan 5

10:30 am - 1:34 pmORD Chicago O'Hare Intl-SAT San Antonio

3h 04mnonstop

6:20 pm - 9:30 pmSAT San Antonio-ORD Chicago O'Hare Intl

3h 10mnonstop

$271American Airlines

Wed, Oct 7 - Wed, Oct 14

9:00 pm - 11:58 pmORD Chicago O'Hare Intl-SAT San Antonio

2h 58mnonstop

6:38 pm - 9:43 pmSAT San Antonio-ORD Chicago O'Hare Intl

3h 05mnonstop

$271American Airlines

Tue, Jan 5 - Tue, Jan 5

8:55 am - 12:09 pmORD Chicago O'Hare Intl-SAT San Antonio

3h 14mnonstop

4:45 pm - 12:03 amSAT San Antonio-ORD Chicago O'Hare Intl

7h 18m1 stop Denver Intl

$271United Airlines

Wed, Oct 7 - Sat, Oct 10

7:50 pm - 10:50 pmORD Chicago O'Hare Intl-SAT San Antonio

3h 00mnonstop

4:17 pm - 9:42 pmSAT San Antonio-ORD Chicago O'Hare Intl

5h 25m1 stop Houston George Bush Intcntl

$271United Airlines

Sat, Oct 24 - Tue, Oct 27

6:20 pm - 9:10 pmMDW Chicago Midway-SAT San Antonio

2h 50mnonstop

1:05 pm - 5:05 pmSAT San Antonio-MDW Chicago Midway

4h 00m1 stop Kansas City

$271Southwest

Tue, Oct 20 - Sat, Oct 24

12:05 pm - 6:25 pmMDW Chicago Midway-SAT San Antonio

6h 20m1 stop Kansas City

5:00 am - 7:40 amSAT San Antonio-MDW Chicago Midway

2h 40mnonstop

$271Southwest

Recent last minute flight deals from Illinois to San Antonio

Fri, Sep 25 - Tue, Oct 20

8:55 pm - 1:48 pmORD Chicago O'Hare Intl-SAT San Antonio

16h 53m1 stop Las Vegas Harry Reid Intl

8:21 pm - 12:24 amSAT San Antonio-ORD Chicago O'Hare Intl

28h 03m1 stop Denver Intl

$332Frontier

Sat, Sep 26 - Wed, Sep 30

6:30 am - 7:25 pmORD Chicago O'Hare Intl-SAT San Antonio

12h 55m1 stop Denver Intl

8:20 pm - 12:23 amSAT San Antonio-ORD Chicago O'Hare Intl

28h 03m1 stop Denver Intl

$372Frontier

Sat, Sep 26 - Sat, Oct 3

5:16 pm - 11:18 pmMLI Moline Quad-City-SAT San Antonio

6h 02m1 stop Atlanta Hartsfield-Jackson

8:00 am - 4:22 pmSAT San Antonio-MLI Moline Quad-City

8h 22m1 stop Atlanta Hartsfield-Jackson

$401Delta

Sat, Sep 26 - Mon, Oct 5

6:00 am - 12:49 pmMLI Moline Quad-City-SAT San Antonio

6h 49m1 stop Atlanta Hartsfield-Jackson

10:59 am - 4:22 pmSAT San Antonio-MLI Moline Quad-City

5h 23m1 stop Atlanta Hartsfield-Jackson

$401Delta

Thu, Sep 24 - Sat, Sep 26

4:33 pm - 9:59 pmMLI Moline Quad-City-SAT San Antonio

5h 26m1 stop Dallas/Fort Worth

6:48 pm - 12:05 amSAT San Antonio-MLI Moline Quad-City

5h 17m1 stop Chicago O'Hare Intl

$455American Airlines

Thu, Sep 24 - Sat, Sep 26

8:25 am - 3:53 pmMLI Moline Quad-City-SAT San Antonio

7h 28m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

1:12 pm - 8:48 pmSAT San Antonio-MLI Moline Quad-City

7h 36m1 stop Denver Intl

$460United Airlines

Fri, Sep 25 - Tue, Oct 20

3:08 pm - 6:09 pmORD Chicago O'Hare Intl-SAT San Antonio

3h 01mnonstop

3:09 pm - 6:11 pmSAT San Antonio-ORD Chicago O'Hare Intl

3h 02mnonstop

$474American Airlines

Fri, Sep 25 - Tue, Oct 20

7:30 am - 1:24 pmORD Chicago O'Hare Intl-SAT San Antonio

5h 54m1 stop Houston George Bush Intcntl

6:35 am - 9:35 amSAT San Antonio-ORD Chicago O'Hare Intl

3h 00mnonstop

$484United Airlines

Sat, Sep 26 - Sun, Sep 27

6:30 am - 7:25 pmORD Chicago O'Hare Intl-SAT San Antonio

12h 55m1 stop Denver Intl

9:25 am - 10:20 amSAT San Antonio-ORD Chicago O'Hare Intl

24h 55m2 stops Raleigh-Durham Orlando

$514Multiple Airlines

Sat, Sep 26 - Wed, Sep 30

6:30 am - 8:45 amORD Chicago O'Hare Intl-SAT San Antonio

26h 15m2 stops Denver Intl Raleigh-Durham

10:03 am - 10:59 pmSAT San Antonio-ORD Chicago O'Hare Intl

12h 56m1 stop Orlando

$518Multiple Airlines

Useful Info

Low season	January
High season	December
Cheapest flight	$87

Best time to beat the crowds with an average 11% drop in price.

Most popular time to fly and prices are also 4% lower on average.

Flight from St. Louis 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.