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$65+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to San Antonio are usually found in April or September, booked 56 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

Find flight deals from St. Louis to San Antonio

Cheapest flights from St. Louis to San Antonio
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 October 27, 2025.

This Booking.com deal was found by Cheapflights users on 10/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 pmSTL - SAT
1 stop23h 45mFrontier
Sat 11/153:12 pmSAT - STL
1 stop17h 55mFrontier
Deal found 10/26$121
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:45 pmSTL - SAT
1 stop18h 32mFrontier
Mon 11/178:25 pmSAT - STL
1 stop12h 42mFrontier
Deal found 10/26$152
This Booking.com deal was found by Cheapflights users on 10/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:12 pmSTL - SAT
1 stop26h 58mFrontier
Mon 11/108:25 pmSAT - STL
1 stop12h 42mFrontier
Deal found 10/25$155
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:42 amSTL - SAT
1 stop6h 09mFrontier
Sun 12/75:46 pmSAT - STL
1 stop16h 06mFrontier
Deal found 10/26$171
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:45 pmSTL - SAT
1 stop23h 45mFrontier
Sun 11/168:25 pmSAT - STL
1 stop12h 42mFrontier
Deal found 10/26$172
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:45 pmSTL - SAT
1 stop18h 32mFrontier
Sun 11/169:59 amSAT - STL
1 stop25h 25mFrontier
Deal found 10/25$179
This Booking.com deal was found by Cheapflights users on 10/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:45 pmSTL - SAT
1 stop23h 45mFrontier
Fri 11/72:09 pmSAT - STL
1 stop25h 47mFrontier
Deal found 10/26$188
This Mytrip deal was found by Cheapflights users on 10/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/162:42 pmSTL - SAT
1 stop7h 19mFrontier
Mon 11/178:25 pmSAT - STL
1 stop12h 42mFrontier
Deal found 10/26$198
This Gotogate deal was found by Cheapflights users on 10/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/298:40 pmSTL - SAT
1 stop23h 08mFrontier
Sun 11/28:26 pmSAT - STL
1 stop12h 41mFrontier
Deal found 10/26$211
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:56 pmSTL - SAT
2 stops17h 07mMultiple Airlines
Sun 11/169:59 amSAT - STL
1 stop25h 25mMultiple Airlines
Deal found 10/25$229

Cheap 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 October 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$121
(Booking.com)

One-way from

$65
(Mytrip)

Popular in

October

Cheapest in

April

Average price

$386

Good round-trip deal

$506 or less

Good one-way deal

$266 or less
Provider with most accurate pricing for Lambert-St Louis-San Antonio flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-San Antonio flights.
Search Deals
From Lambert-St Louis to San Antonio
Search Deals
One-way flight from Lambert-St Louis to San Antonio
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to San Antonio.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to San Antonio.
Search Deals

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 October 27, 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

Fri 11/14

7:45 pm-2:17 pm

1 stop18h 32m

San Antonio

Mon 11/17

8:25 pm-9:07 am

1 stop12h 42m

$152

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Fri 11/7

2:12 pm-5:10 pm

1 stop26h 58m

San Antonio

Mon 11/10

8:25 pm-9:07 am

1 stop12h 42m

$155

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sun 11/2

7:45 pm-7:30 pm

1 stop23h 45m

San Antonio

Fri 11/7

2:09 pm-3:56 pm

1 stop25h 47m

$188

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sun 11/16

2:42 pm-10:01 pm

1 stop7h 19m

San Antonio

Mon 11/17

8:25 pm-9:07 am

1 stop12h 42m

$198

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Fri 11/14

7:45 pm-2:17 pm

1 stop18h 32m

San Antonio

Sun 11/16

8:25 pm-9:07 am

1 stop12h 42m

$205

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Mon 1/12

5:11 pm-10:27 pm

1 stop29h 16m

San Antonio

Mon 1/19

6:17 pm-10:33 pm

1 stop28h 16m

$210

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sun 11/9

6:21 pm-6:32 pm

1 stop24h 11m

San Antonio

Wed 11/12

7:37 pm-5:57 pm

1 stop22h 20m

$230

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Fri 12/5

7:43 pm-1:18 pm

2 stops17h 35m

San Antonio

Sun 12/7

5:46 pm-9:52 am

1 stop16h 06m

$230

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sun 11/9

6:21 pm-6:32 pm

1 stop24h 11m

San Antonio

Fri 11/14

10:04 am-3:56 pm

2 stops29h 52m

$232

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 12/11

12:04 pm-4:51 pm

1 stop28h 47m

San Antonio

Mon 12/15

2:13 pm-10:33 pm

1 stop8h 20m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 21 results
1
2
3

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
GotogatePrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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

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 October 24, 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 $128). Flying from St. Louis to San Antonio in June is currently the most expensive (average of $227). 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 October 27, 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 October 26, 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.

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 October 27, 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.
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,996 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,997 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,033 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,236 reviews

Overall

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • What airports do I use to fly from St. Louis to San Antonio?

    Booking a flight from Lambert-St Louis (STL) to San Antonio (SAT) is your only option if you wish to fly from St. Louis to San Antonio. On a typical day, there are 2 flights from Lambert-St Louis to San Antonio, all of which are around 2h 15m for a nonstop flight. You can also purchase a plane ticket from 5 airlines when you book a flight from Lambert-St Louis to San Antonio.

  • How popular is this St. Louis to San Antonio flight route?

    Within the past month, 8 users have taken a look at flights from Lambert-St Louis to San Antonio.

  • How long is the flight from St. Louis to San Antonio?

    Departing from St. Louis to San Antonio will take you 18h 32m. The distance from St. Louis to San Antonio is about 786 mi.

  • What are the cheapest airlines flying from St. Louis to San Antonio round-trip?

    Our cheapest airline available from St. Louis to San Antonio is Delta. Our recent data shows that you can find tickets from as low as $124 on this airline. Additional options worth looking into are Frontier and American Airlines, starting at $151 and $198 round-trip. Delta is currently priced 62% below the average price you’ll pay for this route.

  • What are the cheapest flights from St. Louis to San Antonio?

    Looking for the cheapest flight from St. Louis to San Antonio? While on average our users pay $537, our data indicates the cheapest price to be $114. The most popular route (Lambert-St Louis - San Antonio), is priced around $206.

  • Can I find deals for flights from St. Louis to San Antonio that include hotel bookings?

    Yes. In addition to deals on St. Louis to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to San Antonio.

  • Can I find deals for business class flights from St. Louis to San Antonio?

    Yes. Cheapflights offers flight deals from St. Louis 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 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 $128). Flying from St. Louis to San Antonio in June is currently the most expensive (average of $227). 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.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New 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.
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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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$124Average$248FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$128Average$214FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$198Average$312FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$200Average$396FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$217Average$309FlexibilityNo cancel feeOn-time69%

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