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$64+ Cheap flights from Illinois to San Antonio (SAT)

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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAT
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Illinois to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to San Antonio (SAT). 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 January 21, 2025.

Round-trip from

$140
(CheapOair)

One-way from

$64
(Mytrip)

Good round-trip deal

$392 or less

Good one-way deal

$224 or less
From Illinois to San Antonio
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One-way flight from Illinois to San Antonio
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Price to beat on a round-trip flight from Illinois to San Antonio.
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Price to beat on a one-way flight from Illinois to San Antonio.
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Find flight deals from Illinois to San Antonio

Cheapest flights from Illinois to San Antonio
Explore the most affordable flight options available from Illinois to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This CheapOair deal was found by Cheapflights users on 1/21. 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 2/68:31 pmSTL - SAT
1 stop23h 04mFrontier
Sat 2/87:10 pmSAT - STL
1 stop12h 07mFrontier
Deal found 1/21$140
This CheapOair deal was found by Cheapflights users on 1/21. 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.
Tue 3/115:38 pmSTL - SAT
1 stop16h 25mMultiple Airlines
Mon 3/1711:05 amSAT - STL
1 stop12h 44mMultiple Airlines
Deal found 1/21$158
This Southwest deal was found by Cheapflights users on 1/21. 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 2/2012:30 pmSTL - SAT
Nonstop2h 25mSouthwest
Mon 2/2411:30 amSAT - STL
Nonstop2h 05mSouthwest
Deal found 1/21$177
This United Airlines deal was found by Cheapflights users on 1/21. 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.
Mon 2/174:30 pmSTL - SAT
1 stop6h 45mUnited Airlines
Tue 2/259:00 amSAT - STL
1 stop7h 33mUnited Airlines
Deal found 1/21$197
This Delta deal was found by Cheapflights users on 1/21. 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 2/124:40 pmSTL - SAT
1 stop7h 47mDelta
Fri 2/142:30 pmSAT - STL
1 stop7h 47mDelta
Deal found 1/21$223
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Sat 2/224:23 pmMLI - SAT
1 stop6h 08mAmerican Airlines
Thu 2/276:03 amSAT - MLI
1 stop5h 03mAmerican Airlines
Deal found 1/20$229
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Sun 2/165:05 amSTL - SAT
1 stop6h 04mAmerican Airlines
Sun 2/236:00 amSAT - STL
1 stop4h 33mAmerican Airlines
Deal found 1/20$249
This Priceline deal was found by Cheapflights users on 1/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/166:15 amORD - SAT
1 stop5h 11mMultiple Airlines
Sun 4/202:18 pmSAT - ORD
1 stop9h 57mMultiple Airlines
Deal found 1/21$254
This Mytrip deal was found by Cheapflights users on 1/21. 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 2/2011:46 amORD - SAT
2 stops25h 13mSpirit Airlines
Mon 2/241:54 pmSAT - ORD
1 stop16h 13mSpirit Airlines
Deal found 1/21$255
This Delta deal was found by Cheapflights users on 1/21. 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 10/15:00 pmMLI - SAT
1 stop7h 14mDelta
Wed 10/84:25 pmSAT - MLI
1 stop6h 04mDelta
Deal found 1/21$259
This FlightHub deal was found by Cheapflights users on 1/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/166:40 amMDW - SAT
1 stop6h 38mFrontier
Thu 2/205:58 pmSAT - MDW
1 stop11h 33mFrontier
Deal found 1/21$260
This American Airlines deal was found by Cheapflights users on 1/21. 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 5/74:32 pmPIA - SAT
1 stop7h 41mAmerican Airlines
Sun 5/116:28 amSAT - PIA
1 stop4h 21mAmerican Airlines
Deal found 1/21$274

Find flights from Illinois to San Antonio within your budget

Customize your flight search to find flights from Illinois 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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 2/6

8:31 pm-7:35 pm

1 stop23h 04m

San Antonio

Sat 2/8

7:10 pm-7:17 am

1 stop12h 07m

$140

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 3/11

5:38 pm-10:03 am

1 stop16h 25m

San Antonio

Mon 3/17

11:05 am-11:49 pm

1 stop12h 44m

$158

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 2/20

12:30 pm-2:55 pm

Nonstop2h 25m

San Antonio

Mon 2/24

11:30 am-1:35 pm

Nonstop2h 05m

$177

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Mon 2/17

4:30 pm-11:15 pm

1 stop6h 45m

San Antonio

Tue 2/25

9:00 am-4:33 pm

1 stop7h 33m

$197

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Wed 2/12

4:40 pm-12:27 am

1 stop7h 47m

San Antonio

Sun 2/16

5:30 am-11:46 am

1 stop6h 16m

$223

MolineSan Antonio

MLI - SAT

MLISAT

Moline Quad-City

Sat 2/22

4:23 pm-10:31 pm

1 stop6h 08m

San Antonio

Thu 2/27

6:03 am-11:06 am

1 stop5h 03m

$229

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sun 2/16

5:05 am-11:09 am

1 stop6h 04m

San Antonio

Sun 2/23

6:00 am-10:33 am

1 stop4h 33m

$249

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sun 2/23

4:00 pm-10:22 am

1 stop18h 22m

San Antonio

Wed 2/26

5:45 am-2:42 pm

3 stops32h 57m

$253

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Wed 4/16

6:15 am-11:26 am

1 stop5h 11m

San Antonio

Sun 4/20

2:18 pm-12:15 am

1 stop9h 57m

$254

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Thu 2/20

11:46 am-12:59 pm

2 stops25h 13m

San Antonio

Mon 2/24

1:54 pm-6:07 am

1 stop16h 13m

$255

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 53 results
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Best time to book a flight from Illinois to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Illinois 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.

Travel insights for flights from Illinois to San Antonio

Get recent, data-driven insights about flights from Illinois to San Antonio including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Illinois to San Antonio (average of $295). Flying from Illinois to San Antonio in March is currently the most expensive (average of $376). 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 IL to SAT?

Find hourly flight availability from Illinois to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to San Antonio as you normally would.

Weekly flight availability from Illinois to San Antonio

Explore weekly flight availability from Illinois to San Antonio. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 21, 2025.

The most flights from USIL to SAT are scheduled on a Monday (17 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in San Antonio by month

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

In terms of precipitation, rainfall in San Antonio ranges from 1.6 - 3.7 inches per month. May is typically the wettest month, when rainfall can reach 3.7 in. December is typically the driest time to visit San Antonio when rainfall is around 1.6 in.

Temperature in San Antonio by month

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

If weather is an important factor for your trip to San Antonio, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. 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 San Antonio. Reviews last updated January 21, 2025.
Read reviews from past customers who have flown Frontier, United Airlines and Spirit Airlines from Illinois to San Antonio. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Related info for your journey

Find useful and relevant information for your journey from Illinois to San Antonio. 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 into for flights to San Antonio from Illinois?

    Most people fly into San Antonio (SAT) if they book a flight to San Antonio from Illinois. San Antonio is conveniently located just 7.6 mi from San Antonio’s city center.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $64. Users have also found prices from $99 and $116 on Delta and Spirit Airlines, respectively.

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

    Most travelers choose Chicago O'Hare Intl - San Antonio, Chicago Midway - San Antonio or Lambert-St Louis - San Antonio when deciding on the best route from Illinois to San Antonio.

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

    Before booking your flight to San Antonio from Illinois, check out the most reliable airlines to get you to your destination on time: Republic Airways (85%), Alaska Airlines (80%), British Airways( 79%).

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

    While on average a flight from Illinois to San Antonio is generally $394, our data shows the cheapest flight currently is $174. When looking at the most popular route, (Chicago O'Hare Intl - San Antonio), you can expect to pay $149 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to San Antonio 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 Illinois to San Antonio?

    Currently, August is the cheapest month in which you can book a flight from Illinois to San Antonio (average of $295). Flying from Illinois to San Antonio in March is currently the most expensive (average of $376). 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.

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Alternative routes for Illinois to San Antonio

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

Discover the top 6 airlines that operate flights from Illinois to San Antonio. 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$94Average$258FlexibilityNo cancel feeOn-time65%
FrontierCheapest$126Average$206FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$138Average$429FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$196Average$433FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$258Average$442FlexibilityNo cancel feeOn-time69%
DeltaCheapest$272Average$400FlexibilityNo cancel feeOn-timeN/A
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