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$75+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAT
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
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 November 21, 2024.

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 November 21, 2024.

This CheapOair deal was found by Cheapflights users on 11/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1310:59 amORD - SAT
1 stop7h 11mFrontier
Mon 12/161:02 pmSAT - ORD
1 stop23h 47mFrontier
Deal found 11/19$148
This CheapOair deal was found by Cheapflights users on 11/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/135:02 pmSTL - SAT
1 stop25h 08mFrontier
Tue 12/1710:27 pmSAT - STL
1 stop9h 46mFrontier
Deal found 11/20$148
This Frontier deal was found by Cheapflights users on 11/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1212:43 pmMDW - SAT
1 stop30h 47mFrontier
Sun 12/158:20 pmSAT - MDW
1 stop15h 28mFrontier
Deal found 11/20$154
This Booking.com deal was found by Cheapflights users on 11/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/56:36 pmORD - SAT
1 stop24h 54mMultiple Airlines
Wed 12/117:37 pmSAT - ORD
1 stop14h 00mMultiple Airlines
Deal found 11/20$167
This eDestinos deal was found by Cheapflights users on 11/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/136:48 pmMDW - SAT
2 stops15h 21mMultiple Airlines
Tue 12/1710:27 pmSAT - MDW
1 stop23h 05mMultiple Airlines
Deal found 11/20$199
This Mytrip deal was found by Cheapflights users on 11/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/59:53 pmORD - SAT
1 stop14h 16mSpirit Airlines
Tue 12/107:37 pmSAT - ORD
1 stop14h 55mSpirit Airlines
Deal found 11/19$201
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Wed 12/115:45 amSTL - SAT
1 stop7h 48mAmerican Airlines
Sun 12/155:00 amSAT - STL
1 stop5h 47mAmerican Airlines
Deal found 11/20$218
This CheapOair deal was found by Cheapflights users on 11/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/55:02 pmSTL - SAT
1 stop25h 08mMultiple Airlines
Wed 1/87:37 pmSAT - STL
1 stop19h 06mMultiple Airlines
Deal found 11/19$266
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Fri 12/66:34 pmMLI - SAT
1 stop5h 15mAmerican Airlines
Sun 12/86:00 amSAT - MLI
1 stop4h 54mAmerican Airlines
Deal found 11/20$288
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Fri 12/64:40 pmPIA - SAT
1 stop7h 09mAmerican Airlines
Tue 12/109:19 amSAT - PIA
1 stop5h 45mAmerican Airlines
Deal found 11/20$288
This United Airlines deal was found by Cheapflights users on 11/20. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/134:45 pmSTL - SAT
1 stop4h 33mUnited Airlines
Tue 12/177:18 amSAT - STL
2 stops9h 11mUnited Airlines
Deal found 11/20$297
This Delta deal was found by Cheapflights users on 11/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/185:02 pmMLI - SAT
1 stop7h 36mDelta
Sun 12/224:35 pmSAT - MLI
1 stop5h 49mDelta
Deal found 11/19$318

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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Fri 1/17

5:05 pm-6:15 pm

1 stop25h 10m

San Antonio

Mon 1/20

7:15 pm-11:31 pm

1 stop28h 16m

$128

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Fri 12/13

10:59 am-6:10 pm

1 stop7h 11m

San Antonio

Mon 12/16

1:02 pm-12:49 pm

1 stop23h 47m

$148

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Fri 1/10

3:37 pm-6:10 pm

1 stop26h 33m

San Antonio

Mon 1/13

1:02 pm-12:13 am

1 stop11h 11m

$148

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Fri 1/17

10:01 pm-6:15 pm

1 stop20h 14m

San Antonio

Tue 1/21

4:23 pm-5:30 am

1 stop13h 07m

$156

ChicagoSan Antonio

MDW - SAT

MDWSAT

Chicago Midway

Fri 12/13

6:48 pm-10:09 am

2 stops15h 21m

San Antonio

Tue 12/17

10:27 pm-9:32 pm

1 stop23h 05m

$199

ChicagoSan Antonio

ORD - SAT

ORDSAT

Chicago O'Hare Intl

Thu 12/5

9:53 pm-12:09 pm

1 stop14h 16m

San Antonio

Tue 12/10

7:37 pm-10:32 am

1 stop14h 55m

$201

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 2/18

11:55 am-8:34 pm

1 stop8h 39m

San Antonio

Sat 2/22

12:33 pm-4:33 pm

1 stop4h 00m

$218

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 2/4

6:30 am-3:42 pm

2 stops9h 12m

San Antonio

Sun 2/9

5:48 pm-10:20 pm

1 stop4h 32m

$243

MolineSan Antonio

MLI - SAT

MLISAT

Moline Quad-City

Thu 2/20

5:05 pm-12:32 am

1 stop7h 27m

San Antonio

Mon 2/24

4:40 pm-10:38 pm

1 stop5h 58m

$258

PeoriaSan Antonio

PIA - SAT

PIASAT

Greater Peoria

Wed 2/26

4:23 pm-10:32 pm

1 stop6h 09m

San Antonio

Sat 3/1

7:48 am-3:53 pm

1 stop8h 05m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 55 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 November 21, 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 November 21, 2024.

The most flights from USIL to SAT are scheduled on a Tuesday (18 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (12 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 November 21, 2024.
Read reviews from past customers who have flown Frontier, Spirit Airlines and American 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
5,015 reviews

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Delta
8.0
Very good
8,758 reviews
Southwest
8.1
Very good
5,015 reviews

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,015 reviews

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,015 reviews

Crew

8.7

Comfort

8.1

Boarding

8.2

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

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 $75. Users have also found prices from $82 and $109 on Spirit Airlines and American 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: SkyWest Airlines (94%), United Airlines (92%), American Airlines( 91%).

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

    While on average a flight from Illinois to San Antonio is generally $368, 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 $156 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$90Average$212FlexibilityNo cancel feeOn-time65%
FrontierCheapest$126Average$206FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$131Average$393FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$188Average$439FlexibilityNo cancel feeOn-time71%
DeltaCheapest$236Average$392FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$256Average$448FlexibilityNo cancel feeOn-time69%
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