What is the cheapest airline that flies from Chicago to San Antonio?

Frontier, Spirit Airlines, and American Airlines are the most popular carriers operating from Chicago to San Antonio

How many flights depart from Chicago to San Antonio on average per week?

124 flights are operational weekly from Chicago to San Antonio as of November 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

Which layover airport has the shortest travel time from Chicago to San Antonio?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 6h 33m.

What airlines fly to San Antonio?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to San Antonio from Chicago according to our data. American Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 5 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Chicago and San Antonio?

Atlanta (ATL) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Chicago to San Antonio?

Denver (DEN) has the shortest average layover time for this route: 3h 15m.

Which layover airport offers the lowest fares from Chicago to San Antonio?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $238.

How many flights depart from Chicago to San Antonio on average per day?

The number of flights available between Chicago and San Antonio is 17 per day as of November 2025. The most frequent departure time is 6:00PM, with 54% of daily flights leaving in the evening.

When did momondo last update prices for flights from Chicago to San Antonio Airport?

Prices for flights from Chicago to San Antonio Airport refresh daily.

How many operators does momondo search for flights from Chicago to San Antonio Airport?

As of November 2025, there are 5 operators available to choose from for flights from Chicago to San Antonio Airport.

How old do you have to be to fly from Chicago to San Antonio Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago to San Antonio Airport.

What documentation or ID do you need to fly to San Antonio Airport?

The travel and health documents you'll need for your trip to San Antonio Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Antonio Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$69 Cheap Flights from Chicago to San Antonio in 2025/26

Q: What is the typical price of a round-trip flight between Chicago and San Antonio?

Prices are currently low for flights on this route. Typical prices usually range from $347 to $512. The lowest price recently found on this route was $157.

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9:06 pm - 1:00 pmORD-SAT

15h 54m1 stop

7:43 pm - 3:12 pmSAT-ORD

19h 29m2 stops

$157Multiple Airlines

Find Deal

Sat, Dec 6 - Mon, Dec 8

6:50 am - 1:00 pmORD-SAT

30h 10m1 stop

7:00 am - 12:13 amSAT-ORD

17h 13m1 stop

$161Multiple Airlines

Find Deal

Thu, Dec 4 - Sat, Dec 6

7:00 am - 6:58 pmORD-SAT

11h 58m1 stop

5:46 pm - 10:24 pmSAT-ORD

28h 38m1 stop

$164Frontier

Find Deal

Mon, Dec 8 - Fri, Dec 12

10:18 am - 6:39 pmMDW-SAT

8h 21m1 stop

7:56 pm - 8:45 pmSAT-MDW

24h 49m2 stops

$165Frontier

Find Deal

Mon, Jan 12 - Thu, Jan 15

6:05 pm - 2:28 pmORD-SAT

20h 23m1 stop

7:37 pm - 9:17 amSAT-ORD

13h 40m1 stop

$165Multiple Airlines

Find Deal

Wed, Nov 19 - Mon, Nov 24

9:06 pm - 1:00 pmORD-SAT

15h 54m1 stop

2:39 pm - 12:30 amSAT-ORD

9h 51m1 stop

$189Spirit Airlines

Find Deal

Wed, Dec 10 - Tue, Dec 30

10:27 am - 12:07 amORD-SAT

13h 40m1 stop

6:30 am - 7:45 pmSAT-ORD

13h 15m1 stop

$191Spirit Airlines

Find Deal

Wed, Feb 4 - Mon, Feb 9

7:15 am - 3:35 pmORD-SAT

8h 20m1 stop

6:44 am - 3:45 pmSAT-ORD

9h 01m1 stop

$213American Airlines

Find Deal

Tue, Dec 16 - Thu, Dec 25

8:25 am - 11:25 amMDW-SAT

3h 00mnonstop

6:40 am - 9:15 amSAT-MDW

2h 35mnonstop

$261Southwest

Find Deal

Mon, Dec 8 - Wed, Dec 10

8:25 am - 11:25 amMDW-SAT

3h 00mnonstop

5:35 am - 11:25 amSAT-MDW

5h 50m1 stop

$271Southwest

Find Deal

Mon, Dec 8 - Wed, Dec 10

Frontier flights from Chicago to San Antonio

Our best Frontier deals on Chicago to San Antonio flight tickets

Frontier

Nov 10

ORD5:05 amChicago O'Hare Intl

11h 35m

1 stop

SAT4:40 pmSan Antonio

Nov 17

SAT5:35 pmSan Antonio

6h 36m

1 stop

ORD12:11 amChicago O'Hare Intl

$160

Find similar

Frontier

Dec 8

ORD7:00 amChicago O'Hare Intl

11h 58m

1 stop

SAT6:58 pmSan Antonio

Dec 12

SAT5:46 pmSan Antonio

28h 38m

1 stop

ORD10:24 pmChicago O'Hare Intl

$164

Find similar

Frontier

Jan 12

MDW10:18 amChicago Midway

8h 21m

1 stop

SAT6:39 pmSan Antonio

Jan 15

SAT7:56 pmSan Antonio

24h 49m

2 stops

MDW8:45 pmChicago Midway

$165

Find similar

Spirit Airlines flights from Chicago to San Antonio

Our best Spirit Airlines deals on Chicago to San Antonio flight tickets

Spirit Airlines

Dec 10

ORD9:06 pmChicago O'Hare Intl

15h 54m

1 stop

SAT1:00 pmSan Antonio

Dec 30

SAT2:39 pmSan Antonio

9h 51m

1 stop

ORD12:30 amChicago O'Hare Intl

$189

Find similar

Spirit Airlines

Feb 4

ORD10:27 amChicago O'Hare Intl

13h 40m

1 stop

SAT12:07 amSan Antonio

Feb 9

SAT6:30 amSan Antonio

13h 15m

1 stop

ORD7:45 pmChicago O'Hare Intl

$191

Find similar

Spirit Airlines

Dec 2

ORD10:12 amChicago O'Hare Intl

8h 20m

1 stop

SAT6:32 pmSan Antonio

Dec 5

SAT3:10 pmSan Antonio

6h 38m

1 stop

ORD9:48 pmChicago O'Hare Intl

$196

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Sat 12/6

9:06 pm-1:00 pm

1 stop15h 54m

San Antonio

Mon 12/8

7:43 pm-3:12 pm

2 stops19h 29m

$157

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Thu 12/4

6:50 am-1:00 pm

1 stop30h 10m

San Antonio

Sat 12/6

7:00 am-12:13 am

1 stop17h 13m

$161

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Mon 12/8

7:00 am-6:58 pm

1 stop11h 58m

San Antonio

Fri 12/12

5:46 pm-10:24 pm

1 stop28h 38m

$164

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Mon 1/12

10:18 am-6:39 pm

1 stop8h 21m

San Antonio

Thu 1/15

7:56 pm-8:45 pm

2 stops24h 49m

$165

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/19

6:05 pm-2:28 pm

1 stop20h 23m

San Antonio

Mon 11/24

7:37 pm-9:17 am

1 stop13h 40m

$165

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 12/10

9:06 pm-1:00 pm

1 stop15h 54m

San Antonio

Tue 12/30

2:39 pm-12:30 am

1 stop9h 51m

$189

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 2/4

10:27 am-12:07 am

1 stop13h 40m

San Antonio

Mon 2/9

6:30 am-7:45 pm

1 stop13h 15m

$191

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Tue 12/16

7:15 am-3:35 pm

1 stop8h 20m

San Antonio

Thu 12/25

6:44 am-3:45 pm

1 stop9h 01m

$213

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Mon 12/8

8:25 am-11:25 am

Nonstop3h 00m

San Antonio

Wed 12/10

6:40 am-9:15 am

Nonstop2h 35m

$261

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Mon 12/8

8:25 am-11:25 am

Nonstop3h 00m

San Antonio

Wed 12/10

5:35 am-11:25 am

1 stop5h 50m

$271

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Chicago to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

Other information

What is the typical price of a round-trip flight between Chicago and San Antonio?

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of October, then book flights to San Antonio from Chicago during August instead. Flights to San Antonio in August, while not as cheap as those in October, still average around $347.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Tuesday when prices can be found for as low as $392. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $453.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from Chicago to San Antonio at noon for as low as $386. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $425. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Chicago to San Antonio flight route?

Fly from Chicago Midway to San Antonio for the best Chicago - San Antonio flight prices

How far in advance should I book a flight to San Antonio?

You are more likely to see cheaper flights to San Antonio from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $400 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Chicago for as low as $326 on momondo.

What cabin class options are available on Chicago to San Antonio flights?

There are 4 cabin classes available to choose from on Chicago to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago to San Antonio flights?

You could potentially save up to 25% on your flight if you consider stops on a Chicago to San Antonio flight.

How have Chicago to San Antonio flight prices changed over time?

As of November 2025, prices for Chicago to San Antonio flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from Chicago to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to San Antonio according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago to San Antonio (CHI to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to San Antonio

Best Price Found	$158
Fastest flight time	2h 55m
Direct flights	Every day
Airports in San Antonio	1 airport

The best one-way flight to San Antonio from Chicago in the past 72 hours is $158. The best round-trip flight deal from Chicago to San Antonio found on momondo in the last 72 hours is $333.

The fastest flight from Chicago to San Antonio takes 2h 55m

Direct flights go from Chicago to San Antonio every day.

There is 1 airport near San Antonio: San Antonio (SAT)

Search flight deals

How far is Chicago to San Antonio by plane?
The straight-line distance from Chicago to San Antonio is 1052.0 mi. A reasonable flight in good conditions will take 2h 55m.
When did momondo last update prices for flights from Chicago to San Antonio Airport?
Prices for flights from Chicago to San Antonio Airport refresh daily.
How many operators does momondo search for flights from Chicago to San Antonio Airport?
As of November 2025, there are 5 operators available to choose from for flights from Chicago to San Antonio Airport.
How old do you have to be to fly from Chicago to San Antonio Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago to San Antonio Airport.
What documentation or ID do you need to fly to San Antonio Airport?
The travel and health documents you'll need for your trip to San Antonio Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Antonio Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Chicago to San Antonio?
momondo data reveals that the most frequently booked plane model on the route from Chicago to San Antonio is Airbus A319, representing 29.43% of all bookings. The subsequent popular models are Boeing 737-700 at 12.94%, Airbus A320-100/200 at 8.58%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 8.34%.
What is the most popular airline from Chicago to San Antonio?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to San Antonio is American Airlines (37% of total bookings). The next most popular airlines are Southwest (26%), United Airlines (24%), and Frontier (10%).

Best airlines flying from Chicago to San Antonio

Compare and see reviews for airlines that fly from Chicago to San Antonio with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $125	Free Cancellation	Rating 5.8 3,116 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $172	Free Cancellation	Rating 6.3 8,115 reviews	Search Spirit Airlines flights
Southwest	PriceFrom $203	Free Cancellation	Rating 8.0 4,240 reviews	Search Southwest flights
United Airlines	PriceFrom $212	Free Cancellation	Rating 7.4 9,002 reviews	Search United Airlines flights
American Airlines	PriceFrom $214	Free Cancellation	Rating 7.2 11,042 reviews	Search American Airlines flights

Southwest Flights From Chicago to San Antonio
Southwest is one of the most popular airlines flying from Chicago to San Antonio, operating 8 flights/week on average for this route. A good Southwest flight deal for Chicago to San Antonio starts from $203 round-trip, up to an average price of $507. Our users have rated Southwest at 8.0/10.
United Airlines Flights From Chicago to San Antonio
$212 is the best United Airlines flight deal from Chicago to San Antonio found on momondo over the last 72 hours. The average United Airlines ticket price found was closer to $448, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 9,002 user reviews) flies into San Antonio from Chicago 16 times in an average week so prices can vary.

New Braunfels

Boerne

Kerrville

Schertz

Pleasanton

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to San Antonio?

Finding the right flight to San Antonio from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Antonio quick and easy, saving you time and money.

Can I find flights from Chicago to San Antonio with flexible booking policies on momondo?

Yes. All flights to San Antonio from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Chicago to San Antonio?

Once all potential Chicago to San Antonio flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Chicago to San Antonio right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Antonio, momondo offers a useful price alert feature which will track prices for flights to San Antonio from Chicago and alert you when they change.

An easier way to manage your San Antonio trip

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Cheap flights from Chicago to San Antonio from $69

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to San Antonio departing on 1/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Chicago to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Chicago and San Antonio?

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of October, then book flights to San Antonio from Chicago during August instead. Flights to San Antonio in August, while not as cheap as those in October, still average around $347.

What is the cheapest day to depart on your flight to San Antonio?

What is the cheapest time of day to depart on your flight to San Antonio?

What is the cheapest Chicago to San Antonio flight route?

Fly from Chicago Midway to San Antonio for the best Chicago - San Antonio flight prices

How far in advance should I book a flight to San Antonio?

What cabin class options are available on Chicago to San Antonio flights?

There are 4 cabin classes available to choose from on Chicago to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago to San Antonio flights?

You could potentially save up to 25% on your flight if you consider stops on a Chicago to San Antonio flight.

How have Chicago to San Antonio flight prices changed over time?

As of November 2025, prices for Chicago to San Antonio flights are approximately 6% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Chicago to San Antonio?

Frontier, Spirit Airlines, and American Airlines are the most popular carriers operating from Chicago to San Antonio

What airlines fly to San Antonio?

Which airport is the most popular layover for flights between Chicago and San Antonio?

Atlanta (ATL) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Chicago to San Antonio?

Flights via Atlanta (ATL) offer the lowest average round-trip price of $238.

Which layover airport has the shortest travel time from Chicago to San Antonio?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 6h 33m.

Which layover airport has the shortest connection time from Chicago to San Antonio?

Denver (DEN) has the shortest average layover time for this route: 3h 15m.

How many flights depart from Chicago to San Antonio on average per day?

The number of flights available between Chicago and San Antonio is 17 per day as of November 2025. The most frequent departure time is 6:00PM, with 54% of daily flights leaving in the evening.

How many flights depart from Chicago to San Antonio on average per week?

124 flights are operational weekly from Chicago to San Antonio as of November 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

When to book flights from Chicago to San Antonio

Cheap Chicago to San Antonio (CHI to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to San Antonio

Best Price Found

Fastest flight time

Direct flights

Airports in San Antonio

How far is Chicago to San Antonio by plane?

When did momondo last update prices for flights from Chicago to San Antonio Airport?

How many operators does momondo search for flights from Chicago to San Antonio Airport?

How old do you have to be to fly from Chicago to San Antonio Airport?

What documentation or ID do you need to fly to San Antonio Airport?

What is the most popular plane model from Chicago to San Antonio?

What is the most popular airline from Chicago to San Antonio?

Best airlines flying from Chicago to San Antonio

Compare and see reviews for airlines that fly from Chicago to San Antonio with momondo

Southwest Flights From Chicago to San Antonio

United Airlines Flights From Chicago to San Antonio

Traveling to a place near San Antonio?

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to San Antonio?

Can I find flights from Chicago to San Antonio with flexible booking policies on momondo?

How can momondo help me find flights from Chicago to San Antonio?

I’m not ready to book a flight from Chicago to San Antonio right now. Can momondo alert me if prices change?

An easier way to manage your San Antonio trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down