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Cheap flights from Chicago O'Hare Intl Airport to San Antonio from $80

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 O'Hare Intl Airport to San Antonio departing on 11/15. 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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Find the cheapest flights from Chicago O'Hare Intl Airport to San Antonio

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:05 pm - 1:19 pmORD-SAT
19h 14m2 stops
Frontier Logo
3:12 pm - 11:29 pmSAT-ORD
8h 17m1 stop
$157Frontier
Find Deal
Wed, Nov 5 - Sat, Nov 8
Spirit Airlines Logo
10:52 am - 6:32 pmORD-SAT
7h 40m1 stop
Spirit Airlines Logo
10:58 am - 11:06 pmSAT-ORD
12h 08m1 stop
$159Spirit Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
Spirit Airlines Logo
10:52 am - 6:32 pmORD-SAT
7h 40m1 stop
Spirit Airlines Logo
3:23 pm - 5:32 amSAT-ORD
14h 09m1 stop
$160Spirit Airlines
Find Deal
Fri, Nov 7 - Tue, Nov 11
Frontier Logo
6:05 pm - 7:06 pmORD-SAT
25h 01m1 stop
Frontier Logo
3:12 pm - 11:29 pmSAT-ORD
8h 17m1 stop
$162Frontier
Find Deal
Wed, Nov 5 - Sat, Nov 8
Multiple Airlines Logo
10:52 am - 6:32 pmORD-SAT
7h 40m1 stop
Multiple Airlines Logo
8:25 pm - 3:39 pmSAT-ORD
19h 14m1 stop
$164Multiple Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
Multiple Airlines Logo
9:22 pm - 9:14 amORD-SAT
35h 52m2 stops
Multiple Airlines Logo
3:12 pm - 11:29 pmSAT-ORD
8h 17m1 stop
$165Multiple Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8
Multiple Airlines Logo
7:58 pm - 1:19 pmORD-SAT
17h 21m1 stop
Multiple Airlines Logo
3:12 pm - 11:29 pmSAT-ORD
8h 17m1 stop
$169Multiple Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8
Multiple Airlines Logo
10:52 am - 6:32 pmORD-SAT
7h 40m1 stop
Multiple Airlines Logo
7:37 pm - 4:25 pmSAT-ORD
20h 48m1 stop
$171Multiple Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
Spirit Airlines Logo
5:10 am - 6:32 pmORD-SAT
13h 22m1 stop
Spirit Airlines Logo
3:23 pm - 5:32 amSAT-ORD
14h 09m1 stop
$174Spirit Airlines
Find Deal
Tue, Nov 11 - Thu, Nov 13
Frontier Logo
5:11 am - 4:40 pmORD-SAT
11h 29m1 stop
Frontier Logo
5:35 pm - 12:11 amSAT-ORD
6h 36m1 stop
$179Frontier
Find Deal
Fri, Oct 31 - Mon, Nov 3

Frontier flights from Chicago O'Hare Intl Airport to San Antonio

Our best Frontier deals on Chicago O'Hare Intl Airport to San Antonio flight tickets
Frontier
Nov 5
ORD6:05 pmChicago O'Hare Intl
19h 14m
2 stops
SAT1:19 pmSan Antonio
Nov 8
SAT3:12 pmSan Antonio
8h 17m
1 stop
ORD11:29 pmChicago O'Hare Intl
$157
Find similar
Frontier
Nov 5
ORD6:05 pmChicago O'Hare Intl
25h 01m
1 stop
SAT7:06 pmSan Antonio
Nov 8
SAT3:12 pmSan Antonio
8h 17m
1 stop
ORD11:29 pmChicago O'Hare Intl
$162
Find similar
Frontier
Oct 25
ORD7:05 amChicago O'Hare Intl
9h 32m
1 stop
SAT4:37 pmSan Antonio
Nov 8
SAT3:12 pmSan Antonio
8h 17m
1 stop
ORD11:29 pmChicago O'Hare Intl
$178
Find similar

Spirit Airlines flights from Chicago O'Hare Intl Airport to San Antonio

Our best Spirit Airlines deals on Chicago O'Hare Intl Airport to San Antonio flight tickets
Spirit Airlines
Nov 12
ORD10:52 amChicago O'Hare Intl
7h 40m
1 stop
SAT6:32 pmSan Antonio
Nov 19
SAT10:58 amSan Antonio
12h 08m
1 stop
ORD11:06 pmChicago O'Hare Intl
$159
Find similar
Spirit Airlines
Nov 7
ORD10:52 amChicago O'Hare Intl
7h 40m
1 stop
SAT6:32 pmSan Antonio
Nov 11
SAT3:23 pmSan Antonio
14h 09m
1 stop
ORD5:32 amChicago O'Hare Intl
$160
Find similar
Spirit Airlines
Nov 11
ORD5:10 amChicago O'Hare Intl
13h 22m
1 stop
SAT6:32 pmSan Antonio
Nov 13
SAT3:23 pmSan Antonio
14h 09m
1 stop
ORD5:32 amChicago O'Hare Intl
$174
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 16, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/5

6:05 pm-1:19 pm

2 stops19h 14m

San Antonio

Sat 11/8

3:12 pm-11:29 pm

1 stop8h 17m

$157

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/12

10:52 am-6:32 pm

1 stop7h 40m

San Antonio

Wed 11/19

10:58 am-11:06 pm

1 stop12h 08m

$159

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Fri 11/7

10:52 am-6:32 pm

1 stop7h 40m

San Antonio

Tue 11/11

3:23 pm-5:32 am

1 stop14h 09m

$160

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/5

6:05 pm-7:06 pm

1 stop25h 01m

San Antonio

Sat 11/8

3:12 pm-11:29 pm

1 stop8h 17m

$162

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/5

10:52 am-6:32 pm

1 stop7h 40m

San Antonio

Mon 11/10

8:25 pm-3:39 pm

1 stop19h 14m

$164

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/5

9:22 pm-9:14 am

2 stops35h 52m

San Antonio

Sat 11/8

3:12 pm-11:29 pm

1 stop8h 17m

$165

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/5

7:58 pm-1:19 pm

1 stop17h 21m

San Antonio

Sat 11/8

3:12 pm-11:29 pm

1 stop8h 17m

$169

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 11/12

10:52 am-6:32 pm

1 stop7h 40m

San Antonio

Wed 11/19

7:37 pm-4:25 pm

1 stop20h 48m

$171

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Tue 11/11

5:10 am-6:32 pm

1 stop13h 22m

San Antonio

Thu 11/13

3:23 pm-5:32 am

1 stop14h 09m

$174

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Fri 10/31

5:11 am-4:40 pm

1 stop11h 29m

San Antonio

Mon 11/3

5:35 pm-12:11 am

1 stop6h 36m

$179

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Antonio from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport 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 cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of August, then book flights to San Antonio from Chicago O'Hare Intl Airport during September instead. Flights to San Antonio in September, while not as cheap as those in August, still average around $333.

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 Wednesday when prices can be found for as low as $390. 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 $456.

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 O'Hare Intl Airport to San Antonio at noon for as low as $382. 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 $426. 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 O'Hare Intl to San Antonio flight route?

Fly from Chicago O'Hare Intl to San Antonio for the best Chicago O'Hare Intl - 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 O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $401 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 O'Hare Intl Airport for as low as $324 on momondo.

What cabin class options are available on Chicago O'Hare Intl to San Antonio flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl 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 O'Hare Intl Airport to San Antonio flights?

You could potentially save up to 30% on your flight if you consider stops on a Chicago O'Hare Intl Airport to San Antonio flight.

How have Chicago O'Hare Intl Airport to San Antonio flight prices changed over time?

As of October 2025, prices for Chicago O'Hare Intl Airport to San Antonio flights are approximately 5% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to San Antonio (ORD to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to San Antonio

Best Price Found

$204

Fastest flight time

2h 45m

Direct flights

Every day

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from Chicago O'Hare Intl Airport in the past 72 hours is $204. The best round-trip flight deal from Chicago O'Hare Intl Airport to San Antonio found on momondo in the last 72 hours is $313.
The fastest flight from Chicago O'Hare Intl Airport to San Antonio takes 2h 45m
Direct flights go from Chicago O'Hare Intl Airport to San Antonio every day.
There is 1 airport near San Antonio: San Antonio (SAT)
Search flight deals

  • How far is Chicago O'Hare Intl to San Antonio by plane?

    The distance between Chicago O'Hare Intl and San Antonio is about 1048.8 mi. Typically, this will take 7h 02m by plane in normal conditions.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to San Antonio Airport?

    Prices for flights from Chicago O'Hare Intl Airport to San Antonio Airport refresh daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to San Antonio Airport?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to San Antonio Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to San Antonio Airport.

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

    The required travel and health documents for your San Antonio Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Antonio Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Chicago O'Hare Intl Airport to San Antonio?

  • What is the most popular airline from Chicago O'Hare Intl Airport to San Antonio?

Best airlines flying from Chicago O'Hare Intl Airport to San Antonio

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $125Free CancellationRating
5.8
3,137 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $172Free CancellationRating
6.3
8,097 reviews
Search Spirit Airlines flights
SouthwestPriceFrom $203Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
American AirlinesPriceFrom $228Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
United AirlinesPriceFrom $230Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights

  • Southwest Flights From Chicago O'Hare Intl Airport to San Antonio

    Southwest flight deals from Chicago O'Hare Intl Airport to San Antonio start from $203 round-trip. Over the 5 Southwest flights for this route in a normal week, average airfare is usually $584 round-trip - but some users have found much cheaper deals with momondo.

  • United Airlines Flights From Chicago O'Hare Intl Airport to San Antonio

    United Airlines (7.4/10 from 8,982 reviews) operates around 12 flights from Chicago O'Hare Intl Airport to San Antonio in any given week. The average United Airlines airfare for this route is around $461, with deals from around $230 rare but found on momondo. Referenced prices are for round-trip Chicago O'Hare Intl Airport to San Antonio flight searches in the last 72 hours.

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Boerne
Schertz
Pleasanton

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to San Antonio. momondo saves you time and could save you money on your trip.

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

Flights from Chicago to San Antonio with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Antonio from Chicago.

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

Of course. momondo tracks the price of Chicago to San Antonio flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your San Antonio trip

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