$74+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Feb 25 — Mar 41
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 September or August, booked 69 days in advance, depart on a Saturday or Tuesday and return on a Monday
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 January 26, 2026.
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 January 26, 2026.
This Frontier deal was found by Cheapflights users on 1/25. 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 2/2610:11 pm
STL
- SAT
1 stop11h 47m
Frontier
Sat 2/282:13 pm
SAT
- STL
1 stop9h 46m
Frontier
Deal found 1/25![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 1/24. 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.
Sun 2/11:03 pm
STL
- SAT
1 stop8h 06m
Frontier
Tue 3/35:36 pm
SAT
- STL
1 stop22h 17m
Frontier
Deal found 1/24![Frontier logo]()
$162
This CheapOair deal was found by Cheapflights users on 1/24. 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 4/88:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Wed 4/153:14 pm
SAT
- STL
1 stop27h 58m
Frontier
Deal found 1/24![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 1/24. 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.
Sat 1/318:22 pm
STL
- SAT
1 stop20h 41m
Frontier
Sun 2/86:13 pm
SAT
- STL
1 stop12h 38m
Frontier
Deal found 1/24![Frontier logo]()
$174
This Frontier deal was found by Cheapflights users on 1/26. 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 2/2610:11 pm
STL
- SAT
1 stop11h 47m
Frontier
Mon 3/29:33 am
SAT
- STL
1 stop10h 19m
Frontier
Deal found 1/26![Frontier logo]()
$175
This CheapOair deal was found by Cheapflights users on 1/26. 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 2/253:49 pm
STL
- SAT
1 stop21h 23m
Frontier
Mon 3/29:33 am
SAT
- STL
1 stop10h 19m
Frontier
Deal found 1/26![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 1/24. 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.
Sun 2/11:03 pm
STL
- SAT
1 stop8h 06m
Frontier
Sun 3/15:04 pm
SAT
- STL
1 stop13h 47m
Frontier
Deal found 1/24![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 1/24. 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.
Sun 2/11:03 pm
STL
- SAT
1 stop8h 06m
Frontier
Fri 2/66:13 pm
SAT
- STL
1 stop12h 38m
Frontier
Deal found 1/24![Frontier logo]()
$186
This Expedia deal was found by Cheapflights users on 1/26. 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 3/97:47 am
STL
- SAT
1 stop12h 11m
Frontier
Tue 3/106:45 am
SAT
- STL
1 stop27h 04m
Frontier
Deal found 1/26![Frontier logo]()
$194
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 January 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $148 (Frontier) |
One-way from | $74 (Trip.com) |
Popular in | November |
Cheapest in | September |
Average price | $309 |
Good round-trip deal | $385 or less |
Good one-way deal | $253 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 January 26, 2026.
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
Wed 2/25
3:49 pm-1:12 pm
1 stop21h 23m
San Antonio
Mon 3/2
9:33 am-7:52 pm
1 stop10h 19m
$176
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 2/26
10:11 pm-9:58 am
1 stop11h 47m
San Antonio
Mon 3/2
5:08 pm-10:27 pm
2 stops29h 19m
$177
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 3/5
3:49 pm-1:38 pm
1 stop21h 49m
San Antonio
Mon 3/9
8:53 pm-11:19 pm
1 stop26h 26m
$198
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 2/20
8:20 pm-1:12 pm
2 stops16h 52m
San Antonio
Sun 2/22
5:04 pm-6:51 am
1 stop13h 47m
$209
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 3/6
8:12 pm-9:06 am
1 stop12h 54m
San Antonio
Mon 3/9
8:53 pm-11:19 pm
1 stop26h 26m
$232
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 4/1
6:00 am-10:50 am
1 stop4h 50m
San Antonio
Mon 4/6
4:17 pm-10:28 pm
1 stop6h 11m
$265
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sun 2/22
6:00 am-10:47 am
1 stop4h 47m
San Antonio
Sun 3/1
5:20 am-9:23 am
1 stop4h 03m
$275
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sun 2/1
1:03 pm-9:09 pm
1 stop8h 06m
San Antonio
Thu 2/5
8:24 pm-6:44 pm
1 stop22h 20m
$276
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 4/17
9:26 am-5:17 pm
1 stop7h 51m
San Antonio
Sun 4/19
6:39 am-11:39 am
1 stop5h 00m
$279
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 4/8
1:25 pm-5:20 pm
1 stop3h 55m
San Antonio
Wed 4/15
7:25 am-9:35 am
Nonstop2h 10m
$287
Showing 1-10 of 20 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 January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| 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 Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-San Antonio flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 January 23, 2026.
Booking 69 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 January 26, 2026.
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’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 January 26, 2026.
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.
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
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 January 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$124 | Average$248 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$214 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$197 | Average$367 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$286 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$222 | Average$282 | FlexibilityNo cancel fee | On-time69% |