$64+ Cheap flights from St. Louis to San Antonio (STL - 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Jan 10 — Jan 171
1 adult, Economy
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Find cheap flights from St. Louis 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.Cheapflights Tip: The best prices from Lambert-St Louis to San Antonio are usually found in May or September, booked 56 days in advance, depart on a Saturday or Tuesday and return on a Wednesday
Cheap flight deals from St. Louis to San Antonio
Cheapest flights from St. Louis to San AntonioExplore the most affordable flight options available from St. Louis to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 11, 2025.
Explore the most affordable flight options available from St. Louis to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 11, 2025.
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:52 pmSTL - SAT
1 stop12h 31mFrontier
Mon 1/57:11 pmSAT - STL
1 stop27h 22mFrontier
Deal found 12/11![Frontier logo]()
$242
This Delta deal was found by Cheapflights users on 12/9. 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 12/315:13 pmSTL - SAT
1 stop7h 06mDelta
Wed 1/76:30 amSAT - STL
1 stop8h 30mDelta
Deal found 12/9![Delta logo]()
$259
This Delta deal was found by Cheapflights users on 12/10. 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 12/315:13 pmSTL - SAT
1 stop7h 06mDelta
Thu 1/15:10 amSAT - STL
1 stop7h 14mDelta
Deal found 12/10![Delta logo]()
$269
This Mytrip deal was found by Cheapflights users on 12/9. 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.
Sat 12/207:43 pmSTL - SAT
1 stop15h 38mFrontier
Tue 12/232:01 pmSAT - STL
1 stop7h 24mFrontier
Deal found 12/9![Frontier logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:48 amSTL - SAT
2 stops31h 28mMultiple Airlines
Wed 1/712:45 pmSAT - STL
1 stop9h 48mMultiple Airlines
Deal found 12/9![Multiple Airlines logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:48 amSTL - SAT
2 stops31h 28mFrontier
Tue 1/63:55 pmSAT - STL
1 stop18h 07mFrontier
Deal found 12/9![Frontier logo]()
$302
This Southwest deal was found by Cheapflights users on 12/10. 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.
Wed 12/311:50 pmSTL - SAT
2 stops8h 00mSouthwest
Mon 1/54:40 pmSAT - STL
1 stop6h 30mSouthwest
Deal found 12/10![Southwest logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2310:10 pmSTL - SAT
2 stops35h 13mMultiple Airlines
Wed 12/312:39 pmSAT - STL
1 stop20h 17mMultiple Airlines
Deal found 12/9![Multiple Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:43 pmSTL - SAT
1 stop28h 34mFrontier
Wed 1/73:55 pmSAT - STL
2 stops22h 53mFrontier
Deal found 12/9![Frontier logo]()
$328
This Delta deal was found by Cheapflights users on 12/9. 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 12/315:13 pmSTL - SAT
1 stop7h 06mDelta
Mon 1/56:22 pmSAT - STL
1 stop5h 17mDelta
Deal found 12/9![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:48 amSTL - SAT
2 stops31h 28mFrontier
Mon 1/57:11 pmSAT - STL
1 stop27h 22mFrontier
Deal found 12/9![Frontier logo]()
$337
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/305:45 pmSTL - SAT
1 stop5h 03mUnited Airlines
Tue 1/61:20 pmSAT - STL
1 stop7h 38mUnited Airlines
Deal found 12/9![United Airlines logo]()
$339
Find flight deals from St. Louis to San Antonio
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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 11, 2025.
Most accurate provider | Gotogate 3 stars |
|---|---|
Most trusted provider | Gotogate 3 stars |
Round-trip from | $140 (Booking.com) |
One-way from | $64 (Frontier) |
Popular in | November |
Cheapest in | May |
Average price | $383 |
Good round-trip deal | $414 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis 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 11, 2025.
Use the filters below to find and compare flights from St. Louis to San Antonio that are best for you.
Fly from
St. Louis
Fly to
San Antonio
Route
Depart
Return
Price
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sat 1/10
7:43 pm-9:18 am
1 stop13h 35m
San Antonio
Mon 1/12
6:30 am-10:33 pm
1 stop16h 03m
$238
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 3/6
3:38 pm-9:37 pm
1 stop5h 59m
San Antonio
Tue 3/10
1:37 pm-9:10 pm
1 stop7h 33m
$269
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 12/31
12:05 pm-8:55 pm
1 stop8h 50m
San Antonio
Mon 1/5
3:00 pm-9:45 pm
1 stop6h 45m
$269
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 2/17
3:38 pm-9:37 pm
1 stop5h 59m
San Antonio
Sun 2/22
5:30 am-11:02 am
1 stop5h 32m
$269
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 3/17
10:15 am-5:35 pm
1 stop7h 20m
San Antonio
Thu 3/19
6:40 pm-12:05 am
1 stop5h 25m
$269
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 5/25
7:05 pm-12:14 am
1 stop5h 09m
San Antonio
Sat 5/30
5:30 am-10:45 am
1 stop5h 15m
$269
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 2/18
10:15 am-4:05 pm
2 stops5h 50m
San Antonio
Sun 2/22
5:40 am-11:00 am
2 stops5h 20m
$279
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 2/9
9:59 am-5:22 pm
1 stop7h 23m
San Antonio
Fri 2/13
6:24 pm-11:36 pm
1 stop5h 12m
$279
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 3/13
5:45 am-12:15 pm
1 stop6h 30m
San Antonio
Sun 3/15
6:00 am-12:50 pm
1 stop6h 50m
$279
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 1/15
9:59 am-5:15 pm
1 stop7h 16m
San Antonio
Mon 1/19
6:30 am-2:38 pm
1 stop8h 08m
$279
Showing 1-10 of 23 results
Compare providers for flights from St. Louis to San Antonio
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to San Antonio in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-San Antonio flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on St. Louis-San Antonio flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from St. Louis-San Antonio flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-San Antonio flights, Cheapflights users trust Gotogate the most. Gotogate has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to San Antonio
Have a flexible travel schedule? Discover the best time to fly to San Antonio from St. Louis 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.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to San Antonio
Prices
Airlines
More
How far ahead should I book a flight from St. Louis to San Antonio?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to San Antonio. Price data was last updated on December 5, 2025.
Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to San Antonio. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from St. Louis to San Antonio?
Currently, October is the cheapest month in which you can book a flight from St. Louis to San Antonio (average of $153). Flying from St. Louis to San Antonio in June is currently the most expensive (average of $228). 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 STL to SAT?
Find hourly flight availability from St. Louis 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 11, 2025.
When flying from St. Louis to San Antonio, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 13% versus a flight in the evening.
What is the cheapest day to fly from St. Louis to San Antonio?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to San Antonio. Price data was last updated on December 6, 2025.
Travelers seeking maximum savings on their St. Louis to San Antonio flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
What’s the top layover airport for flights from St. Louis to San Antonio?
Share of 1-stop round-trip flights from St. Louis to San Antonio chosen by Cheapflights users in the past 12 months, using the same layover each way.
Houston (IAH) – chosen by Cheapflights users on 50% of 1-stop itineraries from St. Louis to San Antonio on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to San Antonio?
Average round-trip fare for 1-stop flights from St. Louis to San Antonio, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of $201.
What’s the fastest layover option from St. Louis to San Antonio?
Shortest average travel time for 1-stop one-way flights from St. Louis to San Antonio, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Houston (IAH) have the shortest average one-way travel time for 1-stop routes: 4h 34m.
Which airport typically offers the quickest layover for flights from St. Louis to San Antonio?
Average layover duration for 1-stop one-way flights from St. Louis to San Antonio, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Houston (IAH) offer the fastest connection on this route, with an average layover time of 1h 05m.
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 11, 2025.
Read through reviews of airlines operating flights from St. Louis to San Antonio, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from St. Louis 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 San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
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Alternative routes for St. Louis to San Antonio
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from St. Louis to San Antonio
Discover the top 5 airlines that operate flights from St. Louis 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 11, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$124 | Average$248 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$220 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$198 | Average$303 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$202 | Average$385 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$228 | Average$301 | FlexibilityNo cancel fee | On-time69% |