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$108+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAT
Dec 27 — Jan 31
Fri 12/27
Fri 1/3
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 December 22, 2024.

Round-trip from

$109
(Mytrip)

One-way from

$108
(Delta)
From Illinois to San Antonio
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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 December 22, 2024.

This FlightHub deal was found by Cheapflights users on 12/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/319:54 pmORD - SAT
1 stop15h 18mMultiple Airlines
Thu 1/98:20 pmSAT - ORD
1 stop23h 05mMultiple Airlines
Deal found 12/20$304
This Gotogate deal was found by Cheapflights users on 12/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/305:45 pmSTL - SAT
1 stop22h 39mFrontier
Sat 1/43:36 pmSAT - STL
1 stop19h 34mFrontier
Deal found 12/20$319
This Trip.com deal was found by Cheapflights users on 12/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/256:00 amORD - SAT
1 stop14h 44mFrontier
Sat 1/117:10 pmSAT - ORD
1 stop14h 44mFrontier
Deal found 12/19$397
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Tue 12/318:40 pmORD - SAT
Nonstop3h 19mAmerican Airlines
Thu 1/95:00 amSAT - ORD
1 stop4h 26mAmerican Airlines
Deal found 12/20$402
This FlightHub deal was found by Cheapflights users on 12/21. 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.
Mon 12/2310:04 pmMDW - SAT
1 stop23h 23mFrontier
Thu 12/266:42 pmSAT - MDW
1 stop14h 49mFrontier
Deal found 12/21$410
This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/314:50 pmMDW - SAT
1 stop7h 06mDelta
Thu 1/96:20 amSAT - MDW
1 stop6h 26mDelta
Deal found 12/21$411
This Cheapflightsfares deal was found by Cheapflights users on 12/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/269:54 pmORD - SAT
1 stop15h 18mSpirit Airlines
Sat 1/114:07 pmSAT - ORD
1 stop13h 24mSpirit Airlines
Deal found 12/19$458
This United deal was found by Cheapflights users on 12/20. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:05 pmORD - SAT
1 stop4h 55mUnited Airlines
Thu 1/97:21 amSAT - ORD
2 stops26h 10mUnited Airlines
Deal found 12/20$500
This American Airlines deal was found by Cheapflights users on 12/21. 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.
Sun 12/293:39 pmPIA - SAT
1 stop6h 16mAmerican Airlines
Thu 1/210:39 amSAT - PIA
1 stop4h 29mAmerican Airlines
Deal found 12/21$509
This Southwest deal was found by Cheapflights users on 12/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/309:55 amSTL - SAT
1 stop5h 40mSouthwest
Sat 1/44:55 pmSAT - STL
Nonstop2h 05mSouthwest
Deal found 12/20$609
This American Airlines deal was found by Cheapflights users on 12/21. 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.
Fri 12/275:37 pmMLI - SAT
1 stop6h 22mAmerican Airlines
Sat 1/45:51 pmSAT - MLI
1 stop5h 07mAmerican Airlines
Deal found 12/21$614
This Southwest deal was found by Cheapflights users on 12/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/285:00 pmMDW - SAT
Nonstop2h 55mSouthwest
Wed 1/14:15 pmSAT - MDW
1 stop6h 20mSouthwest
Deal found 12/20$630

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 December 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sat 1/25

7:09 pm-12:02 pm

1 stop16h 53m

San Antonio

Mon 1/27

7:15 pm-11:31 pm

1 stop28h 16m

$109

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 2/18

4:40 pm-12:27 am

1 stop7h 47m

San Antonio

Sat 2/22

5:30 am-11:46 am

1 stop6h 16m

$222

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Fri 1/17

6:00 pm-11:51 pm

1 stop5h 51m

San Antonio

Mon 1/20

6:00 am-2:07 pm

1 stop8h 07m

$248

MolineSan Antonio

MLI - SAT

MLISAT

Moline Quad-City

Wed 3/19

4:23 pm-10:30 pm

1 stop6h 07m

San Antonio

Wed 3/26

6:00 am-11:16 am

1 stop5h 16m

$258

PeoriaSan Antonio

PIA - SAT

PIASAT

Greater Peoria

Thu 1/23

3:33 pm-9:05 pm

1 stop5h 32m

San Antonio

Tue 1/28

2:36 pm-9:21 pm

1 stop6h 45m

$258

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Tue 2/4

5:06 pm-6:43 pm

2 stops25h 37m

San Antonio

Tue 2/11

11:15 am-12:37 pm

3 stops25h 22m

$303

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Fri 1/10

6:40 am-8:59 pm

2 stops14h 19m

San Antonio

Sun 1/12

1:52 pm-11:48 am

1 stop21h 56m

$307

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Thu 3/13

5:05 am-5:18 pm

1 stop12h 13m

San Antonio

Mon 3/17

5:28 pm-5:04 am

1 stop11h 36m

$312

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Tue 3/18

6:40 am-1:18 pm

1 stop6h 38m

San Antonio

Tue 3/25

2:18 pm-12:17 am

1 stop9h 59m

$312

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sat 1/25

12:41 pm-9:18 pm

2 stops8h 37m

San Antonio

Sun 1/26

7:00 am-2:14 pm

1 stop7h 14m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 46 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 December 22, 2024.

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 December 22, 2024.

The most flights from USIL to SAT are scheduled on a Saturday (20 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 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 December 22, 2024.
Read reviews from past customers who have flown Spirit Airlines, Frontier and United 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
4,804 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Crew

8.7

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
4,804 reviews
Southwest
8.1
Very good
4,804 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Crew

8.7

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
9,537 reviews
Southwest
8.1
Very good
4,804 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Crew

8.7

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
8,597 reviews
Southwest
8.1
Very good
4,804 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Crew

8.7

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
9,028 reviews
Southwest
8.1
Very good
4,804 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Crew

8.7

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
4,804 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Crew

8.7

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 Delta. According to our data, you can fly for as low as $108. Users have also found prices from $116 and $119 on Spirit Airlines and Frontier, 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: SkyWest Airlines (100%), Envoy Air (100%), Lufthansa( 100%).

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

    While on average a flight from Illinois to San Antonio is generally $465, our data shows the cheapest flight currently is $178. When looking at the most popular route, (Chicago O'Hare Intl - San Antonio), you can expect to pay $174 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 December 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$93Average$219FlexibilityNo cancel feeOn-time65%
FrontierCheapest$118Average$212FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$131Average$428FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$190Average$437FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$258Average$441FlexibilityNo cancel feeOn-time69%
DeltaCheapest$272Average$400FlexibilityNo cancel feeOn-timeN/A
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