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Cheap flights from San Antonio to Chicago from $137

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Chicago departing on 4/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:45 am - 2:19 pm
SAT
-
ORD
6h 34m
1 stop
Multiple Airlines Logo
7:20 am - 9:27 am
ORD
-
SAT
26h 07m
1 stop
$197Multiple Airlines
Wed, Apr 8 - Mon, Apr 13
Frontier Logo
6:45 am - 1:19 pm
SAT
-
ORD
6h 34m
1 stop
Frontier Logo
7:38 am - 9:24 am
ORD
-
SAT
25h 46m
1 stop
$201Frontier
Mon, Apr 13 - Thu, Apr 16
Frontier Logo
7:54 pm - 8:37 pm
SAT
-
ORD
24h 43m
1 stop
Frontier Logo
9:42 pm - 6:59 pm
ORD
-
SAT
21h 17m
1 stop
$202Frontier
Tue, May 5 - Sat, May 9
Frontier Logo
7:45 am - 2:19 pm
SAT
-
ORD
6h 34m
1 stop
Frontier Logo
3:27 pm - 3:53 pm
ORD
-
SAT
24h 26m
2 stops
$211Frontier
Wed, Apr 8 - Tue, Apr 14
Frontier Logo
7:54 pm - 8:37 pm
SAT
-
ORD
24h 43m
1 stop
Frontier Logo
9:42 pm - 6:59 pm
ORD
-
SAT
21h 17m
1 stop
$212Frontier
Thu, May 7 - Tue, May 12
Multiple Airlines Logo
10:22 am - 11:17 pm
SAT
-
ORD
12h 55m
1 stop
Multiple Airlines Logo
5:53 pm - 12:19 am
ORD
-
SAT
6h 26m
1 stop
$222Multiple Airlines
Thu, Apr 9 - Sat, Apr 11
Frontier Logo
7:54 pm - 8:37 pm
SAT
-
ORD
24h 43m
1 stop
Frontier Logo
9:42 pm - 6:59 pm
ORD
-
SAT
21h 17m
1 stop
$223Frontier
Tue, May 5 - Sat, May 9
Multiple Airlines Logo
7:45 am - 2:19 pm
SAT
-
ORD
6h 34m
1 stop
Multiple Airlines Logo
6:10 pm - 11:51 pm
ORD
-
SAT
29h 41m
1 stop
$225Multiple Airlines
Wed, Apr 8 - Tue, Apr 14
Frontier Logo
6:45 am - 12:38 am
SAT
-
ORD
17h 53m
1 stop
Frontier Logo
8:00 am - 5:35 pm
ORD
-
SAT
9h 35m
1 stop
$228Frontier
Sat, Apr 11 - Sat, Apr 18
Frontier Logo
7:54 pm - 8:37 pm
SAT
-
ORD
24h 43m
1 stop
Frontier Logo
9:42 pm - 6:59 pm
ORD
-
SAT
21h 17m
1 stop
$232Frontier
Wed, May 6 - Mon, May 11

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

Our best Spirit Airlines deals on San Antonio to Chicago O'Hare Intl Airport flight tickets
Spirit Airlines
Apr 8
SAT10:22 amSan Antonio
9h 29m
1 stop
ORD7:51 pmChicago O'Hare Intl
Apr 12
ORD6:10 pmChicago O'Hare Intl
15h 17m
1 stop
SAT9:27 amSan Antonio
$269
Spirit Airlines
Apr 17
SAT6:00 amSan Antonio
18h 24m
1 stop
ORD12:24 amChicago O'Hare Intl
Apr 24
ORD7:15 pmChicago O'Hare Intl
28h 36m
1 stop
SAT11:51 pmSan Antonio
$284
Spirit Airlines
Mar 31
SAT1:22 pmSan Antonio
6h 41m
1 stop
ORD8:03 pmChicago O'Hare Intl
Apr 7
ORD6:10 pmChicago O'Hare Intl
15h 17m
1 stop
SAT9:27 amSan Antonio
$297

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

Our best Frontier deals on San Antonio to Chicago O'Hare Intl Airport flight tickets
Frontier
Apr 13
SAT6:45 amSan Antonio
6h 34m
1 stop
ORD1:19 pmChicago O'Hare Intl
Apr 16
ORD7:38 amChicago O'Hare Intl
25h 46m
1 stop
SAT9:24 amSan Antonio
$201
Frontier
May 5
SAT7:54 pmSan Antonio
24h 43m
1 stop
ORD8:37 pmChicago O'Hare Intl
May 9
ORD9:42 pmChicago O'Hare Intl
21h 17m
1 stop
SAT6:59 pmSan Antonio
$202
Frontier
May 1
SAT8:25 pmSan Antonio
9h 43m
1 stop
ORD6:08 amChicago O'Hare Intl
May 4
ORD8:58 pmChicago O'Hare Intl
23h 16m
1 stop
SAT8:14 pmSan Antonio
$211

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to Chicago O'Hare Intl Airport 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 March 24, 2026.
Use the filters below to find and compare flights from San Antonio to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Wed 4/8

7:45 am-2:19 pm

1 stop6h 34m

Chicago O'Hare Intl

Mon 4/13

7:20 am-9:27 am

1 stop26h 07m

$197

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Mon 4/13

6:45 am-1:19 pm

1 stop6h 34m

Chicago O'Hare Intl

Thu 4/16

7:38 am-9:24 am

1 stop25h 46m

$201

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Tue 5/5

7:54 pm-8:37 pm

1 stop24h 43m

Chicago O'Hare Intl

Sat 5/9

9:42 pm-6:59 pm

1 stop21h 17m

$202

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Wed 4/8

7:45 am-2:19 pm

1 stop6h 34m

Chicago O'Hare Intl

Tue 4/14

3:27 pm-3:53 pm

2 stops24h 26m

$211

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Thu 5/7

7:54 pm-8:37 pm

1 stop24h 43m

Chicago O'Hare Intl

Tue 5/12

9:42 pm-6:59 pm

1 stop21h 17m

$212
Quickest round-trip

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Thu 4/9

10:22 am-11:17 pm

1 stop12h 55m

Chicago O'Hare Intl

Sat 4/11

5:53 pm-12:19 am

1 stop6h 26m

$222

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Tue 5/5

7:54 pm-8:37 pm

1 stop24h 43m

Chicago O'Hare Intl

Sat 5/9

9:42 pm-6:59 pm

1 stop21h 17m

$223

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Wed 4/8

7:45 am-2:19 pm

1 stop6h 34m

Chicago O'Hare Intl

Tue 4/14

6:10 pm-11:51 pm

1 stop29h 41m

$225

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Sat 4/11

6:45 am-12:38 am

1 stop17h 53m

Chicago O'Hare Intl

Sat 4/18

8:00 am-5:35 pm

1 stop9h 35m

$228

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Wed 5/6

7:54 pm-8:37 pm

1 stop24h 43m

Chicago O'Hare Intl

Mon 5/11

9:42 pm-6:59 pm

1 stop21h 17m

$232

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 Chicago from

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

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 Chicago O'Hare Intl Airport?

The month of April is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from San Antonio averaging around $351.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Thursday when prices can be found for as low as $462. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from San Antonio because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $827.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from San Antonio in the morning is the least expensive time of day to depart. momondo users have found prices as low as $492 when looking at flights departing in the morning. Try not to purchase tickets at noon because they tend to be around $857. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest San Antonio to Chicago O'Hare Intl flight route?

Fly from San Antonio to Chicago O'Hare Intl for the best San Antonio - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $381 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from San Antonio for as low as $294 on momondo.

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

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

You could potentially save up to 1% on your flight if you consider stops on a San Antonio to Chicago O'Hare Intl Airport flight.

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

As of March 2026, prices for San Antonio to Chicago O'Hare Intl Airport flights are approximately 42% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$213

Fastest flight time

2h 51m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from San Antonio in the past 72 hours is $213. The best round-trip flight deal from San Antonio to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $401.
The fastest flight from San Antonio to Chicago O'Hare Intl Airport takes 2h 51m
Direct flights go from San Antonio to Chicago O'Hare Intl Airport every day.
Search flight deals

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

    San Antonio and Chicago O'Hare Intl are 1048.8 mi apart from one another. A reasonable flight in good conditions will take 2h 51m.

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

    Prices for flights from San Antonio Airport to Chicago O'Hare Intl Airport are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The necessary travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

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

Compare and see reviews for airlines that fly from San Antonio to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $96Free CancellationRating
5.7
3,017 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $143Free CancellationRating
6.3
8,534 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $215Free CancellationRating
7.1
11,491 reviews
Search American Airlines flights
United AirlinesPriceFrom $260Free CancellationRating
7.4
9,471 reviews
Search United Airlines flights

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

    United Airlines operates around 15 flights from San Antonio to Chicago O'Hare Intl Airport every week. The average price of these flights found in the last 72 hours has been $431, but momondo users have found United Airlines deals from San Antonio to Chicago O'Hare Intl Airport from as low as $260 round-trip. United Airlines has been scored 7.4/10 in 9,471 reviews.

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

    The best American Airlines deal for San Antonio to Chicago O'Hare Intl Airport flight tickets found on momondo in the last 72 hours was $215, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $372 round-trip. American Airlines operates 10 flights out of San Antonio into Chicago O'Hare Intl Airport in an average week, so prices vary by time and availability. 11,491 American Airlines reviews by users on momondo have scored the airline at 7.1/10.

Traveling to a place near Chicago?

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Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Antonio to Chicago. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Chicago from San Antonio which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential San Antonio to Chicago 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 San Antonio to Chicago right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Antonio to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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