$100+ 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 5/24. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Illinois to San Antonio with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to San Antonio
Keep the following information in mind while searching for Illinois to San Antonio flight deals. Data was last updated May 1, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $199 (American Airlines) |
One-way from | $100 (American Airlines) |
Popular in | March |
Cheapest in | August |
Average price | $367 |
Good round-trip deal | $317 or less |
Good one-way deal | $173 or less |
Find flight deals from Illinois to San Antonio
Cheapest flights from Illinois to San AntonioExplore 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 May 1, 2025.
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 May 1, 2025.
This CheapOair deal was found by Cheapflights users on 5/1. 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.
This American Airlines deal was found by Cheapflights users on 4/30. 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.
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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.
This Booking.com deal was found by Cheapflights users on 4/29. 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.
This Frontier deal was found by Cheapflights users on 4/30. 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.
This FlightHub deal was found by Cheapflights users on 5/1. 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.
This Delta deal was found by Cheapflights users on 4/30. 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.
This Delta deal was found by Cheapflights users on 4/30. 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.
This American Airlines deal was found by Cheapflights users on 4/30. 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.
This American Airlines deal was found by Cheapflights users on 5/1. 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.
This United Airlines deal was found by Cheapflights users on 5/1. 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.
This Southwest deal was found by Cheapflights users on 4/30. 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.
Cheapflights Fare Finder
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 May 1, 2025.
Use the filters below to find and compare flights from Illinois to San Antonio that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sat 5/17
5:45 pm-9:52 am
1 stop16h 07m
San Antonio
Mon 5/19
8:31 pm-11:44 pm
1 stop27h 13m
MolineSan Antonio
MLI - SAT
MLISAT
Moline Quad-City
Wed 7/2
3:55 pm-11:03 pm
1 stop7h 08m
San Antonio
Fri 7/4
8:05 am-3:48 pm
1 stop7h 43m
ChicagoSan Antonio
ORD - SAT
ORDSAT
Chicago O'Hare Intl
Fri 5/23
6:59 pm-1:42 pm
1 stop18h 43m
San Antonio
Sun 5/25
2:55 pm-11:29 pm
1 stop8h 34m
ChicagoSan Antonio
ORD - SAT
ORDSAT
Chicago O'Hare Intl
Wed 5/21
12:41 pm-10:51 pm
1 stop10h 10m
San Antonio
Sat 5/24
7:36 pm-11:52 pm
1 stop28h 16m
ChicagoSan Antonio
ORD - SAT
ORDSAT
Chicago O'Hare Intl
Sun 6/1
6:00 am-6:50 pm
1 stop12h 50m
San Antonio
Fri 6/6
5:38 pm-11:59 pm
1 stop6h 21m
ChicagoSan Antonio
MDW - SAT
MDWSAT
Chicago Midway
Thu 5/29
9:12 pm-9:47 am
1 stop12h 35m
San Antonio
Thu 6/5
3:56 pm-2:56 pm
1 stop23h 00m
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 6/10
11:29 am-5:08 pm
1 stop5h 39m
San Antonio
Tue 6/24
8:10 am-2:37 pm
1 stop6h 27m
MolineSan Antonio
MLI - SAT
MLISAT
Moline Quad-City
Thu 5/29
5:15 pm-10:18 pm
1 stop5h 03m
San Antonio
Sat 6/7
4:42 pm-10:57 pm
1 stop6h 15m
PeoriaSan Antonio
PIA - SAT
PIASAT
Greater Peoria
Thu 5/29
5:05 pm-11:50 pm
1 stop6h 45m
San Antonio
Sun 6/1
7:00 am-11:04 am
1 stop4h 04m
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 9/18
4:17 pm-7:57 pm
1 stop3h 40m
San Antonio
Sun 9/21
6:28 pm-11:49 pm
1 stop5h 21m
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.
Cheapflights Insights
Everything you need to know about your flight from Illinois to San Antonio
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 May 1, 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 May 1, 2025.
The most flights from USIL to SAT are scheduled on a Thursday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 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 May 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta 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.
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
Crew
Entertainment
Overall
Boarding
Comfort
Food
Reviews
James,Apr 2025
LAX - SFO
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.
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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.
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 May 1, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$101 | Average$251 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$125 | Average$210 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$221 | Average$506 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$234 | Average$417 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$258 | Average$452 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$375 | FlexibilityNo cancel fee | On-timeN/A |