$89+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAT
Feb 27 — Mar 61
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 February 22, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $120 (CheapOair) |
One-way from | $89 (Southwest) |
Popular in | March |
Cheapest in | September |
Average price | $427 |
Good round-trip deal | $372 or less |
Good one-way deal | $213 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 February 22, 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 February 22, 2025.
This CheapOair deal was found by Cheapflights users on 2/20. 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.
Thu 4/245:41 pmSTL - SAT
1 stop25h 18mFrontier
Mon 4/287:59 pmSAT - STL
1 stop28h 05mFrontier
Deal found 2/20![Frontier logo]()
$120
This FlightHub deal was found by Cheapflights users on 2/21. 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.
Thu 4/246:11 pmSTL - SAT
1 stop15h 45mMultiple Airlines
Mon 4/287:59 pmSAT - STL
1 stop28h 05mMultiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$170
This Southwest deal was found by Cheapflights users on 2/21. 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.
Tue 3/117:05 pmSTL - SAT
Nonstop2h 20mSouthwest
Tue 3/186:25 amSAT - STL
Nonstop2h 05mSouthwest
Deal found 2/21![Southwest logo]()
$177
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Tue 3/114:29 pmSTL - SAT
1 stop6h 34mUnited Airlines
Tue 3/185:30 amSAT - STL
2 stops6h 42mUnited Airlines
Deal found 2/21![United Airlines logo]()
$202
This American Airlines deal was found by Cheapflights users on 2/21. 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 4/46:00 pmSTL - SAT
1 stop5h 58mAmerican Airlines
Mon 4/74:04 pmSAT - STL
1 stop7h 29mAmerican Airlines
Deal found 2/21![American Airlines logo]()
$217
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/155:40 pmSTL - SAT
1 stop6h 34mDelta
Tue 7/228:00 amSAT - STL
1 stop7h 58mDelta
Deal found 2/20![Delta logo]()
$229
This CheapOair deal was found by Cheapflights users on 2/21. 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 3/2012:29 pmORD - SAT
1 stop9h 06mMultiple Airlines
Sun 3/235:58 pmSAT - ORD
1 stop11h 06mMultiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$245
This Mytrip deal was found by Cheapflights users on 2/22. 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 4/34:15 pmORD - SAT
3 stops29h 20mSpirit Airlines
Mon 4/79:35 pmSAT - ORD
2 stops15h 18mSpirit Airlines
Deal found 2/22![Spirit Airlines logo]()
$246
This Mytrip deal was found by Cheapflights users on 2/21. 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 2/278:04 amORD - SAT
1 stop10h 46mFrontier
Fri 2/285:58 pmSAT - ORD
1 stop11h 02mFrontier
Deal found 2/21![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 2/22. 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 4/28:50 pmMDW - SAT
1 stop18h 44mFrontier
Sun 4/64:39 pmSAT - MDW
1 stop12h 41mFrontier
Deal found 2/22![Frontier logo]()
$250
This Delta deal was found by Cheapflights users on 2/21. 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 2/21![Delta logo]()
$259
This American Airlines deal was found by Cheapflights users on 2/21. 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.
Thu 4/175:16 pmPIA - SAT
1 stop6h 42mAmerican Airlines
Tue 4/224:04 pmSAT - PIA
1 stop5h 59mAmerican Airlines
Deal found 2/21![American Airlines logo]()
$259
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 February 22, 2025.
Fly from
Illinois
Fly to
San Antonio
Route
Depart
Return
Price
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 4/24
5:41 pm-6:59 pm
1 stop25h 18m
San Antonio
Mon 4/28
7:59 pm-12:04 am
1 stop28h 05m
$120
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 4/24
6:11 pm-9:56 am
1 stop15h 45m
San Antonio
Mon 4/28
7:59 pm-12:04 am
1 stop28h 05m
$170
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 3/11
7:05 pm-9:25 pm
Nonstop2h 20m
San Antonio
Tue 3/18
6:25 am-8:30 am
Nonstop2h 05m
$177
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 3/11
4:29 pm-11:03 pm
1 stop6h 34m
San Antonio
Tue 3/18
5:30 am-12:12 pm
2 stops6h 42m
$202
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 4/4
6:00 pm-11:58 pm
1 stop5h 58m
San Antonio
Mon 4/7
4:04 pm-11:33 pm
1 stop7h 29m
$217
ChicagoSan Antonio
ORD - SAT
ORDSAT
Chicago O'Hare Intl
Thu 3/20
12:29 pm-9:35 pm
1 stop9h 06m
San Antonio
Sun 3/23
5:58 pm-5:04 am
1 stop11h 06m
$245
ChicagoSan Antonio
ORD - SAT
ORDSAT
Chicago O'Hare Intl
Thu 4/3
4:15 pm-9:35 pm
3 stops29h 20m
San Antonio
Mon 4/7
9:35 pm-12:53 pm
2 stops15h 18m
$246
ChicagoSan Antonio
ORD - SAT
ORDSAT
Chicago O'Hare Intl
Thu 2/27
8:04 am-6:50 pm
1 stop10h 46m
San Antonio
Fri 2/28
5:58 pm-5:00 am
1 stop11h 02m
$250
ChicagoSan Antonio
MDW - SAT
MDWSAT
Chicago Midway
Wed 4/2
8:50 pm-3:34 pm
1 stop18h 44m
San Antonio
Sun 4/6
4:39 pm-5:20 am
1 stop12h 41m
$250
MolineSan Antonio
MLI - SAT
MLISAT
Moline Quad-City
Thu 4/17
6:30 pm-11:58 pm
1 stop5h 28m
San Antonio
Sun 4/20
6:02 am-10:51 am
1 stop4h 49m
$259
Showing 1-10 of 50 results
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 February 22, 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 February 22, 2025.
The most flights from USIL to SAT are scheduled on a Friday (21 on average). You will have fewer flight options on Saturday, 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 February 22, 2025.
Read reviews from past customers who have flown Southwest, Delta 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.
Crew
8.7
Overall
8.1
Food
7.1
Boarding
8.2
Comfort
8.1
Entertainment
7.6
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Crew
8.7
Overall
8.1
Food
7.1
Boarding
8.2
Comfort
8.1
Entertainment
7.6
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Crew
8.7
Overall
8.1
Food
7.1
Boarding
8.2
Comfort
8.1
Entertainment
7.6
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Crew
8.7
Overall
8.1
Food
7.1
Boarding
8.2
Comfort
8.1
Entertainment
7.6
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Crew
8.7
Overall
8.1
Food
7.1
Boarding
8.2
Comfort
8.1
Entertainment
7.6
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
Crew
8.7
Overall
8.1
Food
7.1
Boarding
8.2
Comfort
8.1
Entertainment
7.6
Reviews
1 / 20
2.0
MediocreBhoopal,Nov 2024
STL - BOS
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.
Traveling to a place near Illinois?
Book flights to Illinois if you plan to visit one of these locationsNew Braunfels
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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 February 22, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$101 | Average$272 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$120 | Average$210 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$430 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$199 | Average$424 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$258 | Average$443 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$272 | Average$398 | FlexibilityNo cancel fee | On-timeN/A |