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$135+ Cheap flights from San Antonio (SAT) to Chicago (CHI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — CHI
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to Chicago are usually found in April or May, booked 52 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from San Antonio to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$195
(CheapOair)

One-way from

$135
(Frontier)

Popular in

March

Cheapest in

April

Average price

$472

Good round-trip deal

$388 or less

Good one-way deal

$198 or less
Provider with most accurate pricing for San Antonio-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for San Antonio-Chicago (CHI) flights.
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From San Antonio to Chicago (CHI)
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One-way flight from San Antonio to Chicago (CHI)
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from San Antonio to Chicago (CHI).
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Price to beat on a one-way flight from San Antonio to Chicago (CHI).
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Find flight deals from San Antonio to Chicago

Cheapest flights from San Antonio to Chicago
Explore the most affordable flight options available from San Antonio to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This CheapOair deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/15:03 pmSAT - ORD
1 stop6h 13mSpirit Airlines
Sat 5/34:55 pmORD - SAT
1 stop8h 15mSpirit Airlines
Deal found 3/27$195
This CheapOair deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/91:43 pmSAT - ORD
1 stop15h 27mFrontier
Sat 5/104:15 pmORD - SAT
1 stop17h 37mFrontier
Deal found 3/27$200
This CheapOair deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/81:43 pmSAT - MDW
1 stop25h 05mFrontier
Sun 5/116:15 amMDW - SAT
1 stop30h 28mFrontier
Deal found 3/27$200
This CheapOair deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/72:37 pmSAT - ORD
1 stop14h 48mMultiple Airlines
Thu 5/88:14 pmORD - SAT
1 stop16h 29mMultiple Airlines
Deal found 3/27$210
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:34 pmSAT - ORD
Nonstop2h 55mAmerican Airlines
Thu 5/88:47 pmORD - SAT
Nonstop3h 03mAmerican Airlines
Deal found 3/27$217
This Southwest deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/177:00 amSAT - MDW
Nonstop2h 40mSouthwest
Wed 4/307:15 pmMDW - SAT
Nonstop2h 50mSouthwest
Deal found 3/25$217
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:06 pmSAT - ORD
1 stop6h 09mUnited Airlines
Mon 5/127:48 pmORD - SAT
Nonstop3h 11mUnited Airlines
Deal found 3/27$227
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/165:30 amSAT - MDW
1 stop6h 33mDelta
Wed 4/233:02 pmMDW - SAT
1 stop7h 38mDelta
Deal found 3/26$237
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/15:39 amSAT - RFD
1 stop15h 07mMultiple Airlines
Sun 5/49:36 pmRFD - SAT
1 stop11h 56mMultiple Airlines
Deal found 3/27$297
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2411:40 amSAT - ORD
1 stop6h 34mDelta
Sun 4/279:00 amORD - SAT
1 stop6h 53mDelta
Deal found 3/27$342
This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/712:20 pmSAT - ORD
2 stops9h 40mSouthwest
Wed 6/117:30 amORD - SAT
1 stop4h 05mSouthwest
Deal found 3/27$408
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/105:39 amSAT - MDW
3 stops28h 30mMultiple Airlines
Sun 4/132:19 pmMDW - SAT
3 stops42h 55mMultiple Airlines
Deal found 3/26$534

Cheapflights Fare Finder

Customize your flight search to find flights from San Antonio to Chicago 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, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from San Antonio to Chicago that are best for you.

Fly from

San Antonio

Fly to

Chicago

Route

Depart

Return

Price

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Thu 5/1

5:03 pm-11:16 pm

1 stop6h 13m

Chicago O'Hare Intl

Sat 5/3

4:55 pm-1:10 am

1 stop8h 15m

$195

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Fri 5/9

1:43 pm-5:10 am

1 stop15h 27m

Chicago O'Hare Intl

Sat 5/10

4:15 pm-9:52 am

1 stop17h 37m

$200

San AntonioChicago

SAT - MDW

SATMDW

San Antonio

Thu 5/8

1:43 pm-2:48 pm

1 stop25h 05m

Chicago Midway

Sun 5/11

6:15 am-12:43 pm

1 stop30h 28m

$200

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Wed 5/7

2:37 pm-5:25 am

1 stop14h 48m

Chicago O'Hare Intl

Thu 5/8

8:14 pm-12:43 pm

1 stop16h 29m

$210

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Wed 5/7

6:34 pm-9:29 pm

Nonstop2h 55m

Chicago O'Hare Intl

Thu 5/8

8:47 pm-11:50 pm

Nonstop3h 03m

$217

San AntonioChicago

SAT - MDW

SATMDW

San Antonio

Thu 4/17

7:00 am-9:40 am

Nonstop2h 40m

Chicago Midway

Wed 4/30

7:15 pm-10:05 pm

Nonstop2h 50m

$217

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Thu 5/8

6:06 pm-12:15 am

1 stop6h 09m

Chicago O'Hare Intl

Mon 5/12

7:48 pm-10:59 pm

Nonstop3h 11m

$227

San AntonioChicago

SAT - MDW

SATMDW

San Antonio

Wed 4/16

5:30 am-12:03 pm

1 stop6h 33m

Chicago Midway

Wed 4/23

3:02 pm-10:40 pm

1 stop7h 38m

$237

San AntonioChicago

SAT - RFD

SATRFD

San Antonio

Thu 5/1

5:39 am-8:46 pm

1 stop15h 07m

Chicago Greater Rockford

Sun 5/4

9:36 pm-9:32 am

1 stop11h 56m

$297

San AntonioChicago

SAT - ORD

SATORD

San Antonio

Thu 4/24

11:40 am-6:14 pm

1 stop6h 34m

Chicago O'Hare Intl

Sun 4/27

9:00 am-3:53 pm

1 stop6h 53m

$342

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 26 results
1
2
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Compare providers for flights from San Antonio to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Chicago in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Antonio-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Antonio-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for San Antonio to Chicago flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Antonio to Chicago trip
Airlines
United Airlines

Basic Economy allows a personal item only; no carry-on bags permitted.


Prepay checked bags 24 hours before to save on fees.

Read more about United Airlinesby Harriet Baskas
Southwest

Enjoy free snacks and non-alcoholic drinks, plus in-flight entertainment on your device.


Two free checked bags included, even oversized items like skis or golf clubs.

Read more about Southwestby Marisa Garcia
Airports
SAT

SAT's central ticketing area simplifies check-in. After security, explore diverse dining options in Terminals A and B without needing to re-clear security.

Read more about SATby Ramsey Qubein
ORD

Upon arrival at ORD, consider taking the 'L' train for a quick and cost-effective trip to downtown Chicago, avoiding potential traffic delays.

Read more about ORDby Ramsey Qubein
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Marisa Garcia

Marisa Garcia

Expert on Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD and SAT

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from San Antonio to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from San Antonio with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Antonio to Chicago

How far ahead should I book a flight from San Antonio to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Chicago. Price data was last updated on March 21, 2025.

To ensure you get the cheapest price possible for a flight from San Antonio to Chicago, you should look to book at least 52 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from San Antonio to Chicago?

Currently, August is the cheapest month in which you can book a flight from San Antonio to Chicago (average of $245). Flying from San Antonio to Chicago in March is currently the most expensive (average of $323). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAT to CHI?

Find hourly flight availability from San Antonio to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

When flying from San Antonio to Chicago, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 68% versus a flight at noon.

What is the cheapest day to fly from San Antonio to Chicago?

Use this chart to determine the cheapest time to fly round-trip from San Antonio to Chicago. Price data was last updated on March 23, 2025.

Travelers seeking maximum savings on their San Antonio to Chicago flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chicago. Reviews last updated March 28, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from San Antonio to Chicago. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Antonio to Chicago?

    If you book a flight to Chicago from San Antonio, you will be flying from San Antonio, which is the city’s only airport. San Antonio (SAT) is located 7.6 mi from the center of San Antonio. There are 11 flights from San Antonio to Chicago per day from 6 different airlines.

  • What are the cheapest airlines flying from San Antonio to Chicago round-trip?

    Cheapflights users have booked flights from San Antonio to Chicago round-trip from $195. Other airlines that can offer you cheap pricing are Frontier, from $200, and American Airlines, from $217. These flights start at 48% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from San Antonio to Chicago one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $135. However, be on the lookout for offers from Spirit Airlines and United Airlines, as they are both options that can get you from San Antonio to Chicago for a low price.

  • What are the most popular routes from San Antonio to Chicago?

    When deciding which route to take from San Antonio to Chicago consider San Antonio - Chicago O'Hare Intl, San Antonio - Chicago Midway or San Antonio - Chicago Greater Rockford as they are the most popular.

  • What are the most reliable airlines from San Antonio to Chicago?

    The top 3 most reliable airlines when flying from San Antonio to Chicago are Royal Jordanian (95%), Qatar Airways (93%) and Japan Airlines (92%).

  • What are the cheapest flights from San Antonio to Chicago?

    On average you can expect to pay $1,825 for a flight from San Antonio to Chicago. The cheapest flight overall is $159 while the most popular route, (San Antonio - Chicago O'Hare Intl) is currently priced at $188.

  • Can I find deals for flights from San Antonio to Chicago that include hotel bookings?

    Yes. In addition to deals on San Antonio to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Chicago.

  • Can I find deals for business class flights from San Antonio to Chicago?

    Yes. Cheapflights offers flight deals from San Antonio to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Antonio to Chicago?

    Currently, August is the cheapest month in which you can book a flight from San Antonio to Chicago (average of $245). Flying from San Antonio to Chicago in March is currently the most expensive (average of $323). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton

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Alternative routes for San Antonio to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from San Antonio to Chicago

Discover the top 6 airlines that operate flights from San Antonio to Chicago. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$111Average$232FlexibilityNo cancel feeOn-time65%
FrontierCheapest$112Average$192FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$222Average$428FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$250Average$397FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$289Average$469FlexibilityNo cancel feeOn-time69%
DeltaCheapest$297Average$416FlexibilityNo cancel feeOn-timeN/A
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