HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Antonio

$86+ 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 3/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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.

The best prices from Lambert-St Louis to San Antonio are usually found in August or May, booked 56 days in advance, depart on a Tuesday or Monday and return on a Thursday

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$120
(CheapOair)

One-way from

$86
(CheapOair)

Popular in

June

Cheapest in

August

Average price

$332

Good round-trip deal

$277 or less

Good one-way deal

$159 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. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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

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 February 20, 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$120
This FlightHub deal was found by Cheapflights users on 2/18. 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.
Tue 4/86:47 pmSTL - SAT
1 stop15h 09mMultiple Airlines
Fri 4/115:47 pmSAT - STL
1 stop23h 56mMultiple Airlines
Deal found 2/18$170
This Southwest deal was found by Cheapflights users on 2/19. 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.
Thu 4/246:10 pmSTL - SAT
Nonstop2h 15mSouthwest
Mon 4/285:00 amSAT - STL
Nonstop2h 05mSouthwest
Deal found 2/19$177
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Tue 3/255:37 pmSTL - SAT
1 stop5h 25mAmerican Airlines
Thu 3/275:54 amSAT - STL
1 stop5h 30mAmerican Airlines
Deal found 2/18$214
This Delta deal was found by Cheapflights users on 2/19. 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.
Thu 4/177:01 pmSTL - SAT
1 stop5h 29mDelta
Sun 4/205:30 amSAT - STL
1 stop6h 15mDelta
Deal found 2/19$223
This Mytrip deal was found by Cheapflights users on 2/19. 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.
Tue 3/44:00 pmSTL - SAT
1 stop18h 16mSpirit Airlines
Fri 3/71:22 pmSAT - STL
2 stops19h 47mSpirit Airlines
Deal found 2/19$263
This United Airlines deal was found by Cheapflights users on 2/18. 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 3/251:05 pmSTL - SAT
2 stops8h 37mUnited Airlines
Thu 3/276:45 amSAT - STL
1 stop5h 27mUnited Airlines
Deal found 2/18$302

Find flights from St. Louis to San Antonio within your budget

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 February 20, 2025.

Fly from

St. Louis

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

Tue 4/8

6:47 pm-9:56 am

1 stop15h 09m

San Antonio

Fri 4/11

5:47 pm-5:43 pm

1 stop23h 56m

$170

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 4/24

6:10 pm-8:25 pm

Nonstop2h 15m

San Antonio

Mon 4/28

5:00 am-7:05 am

Nonstop2h 05m

$177

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 3/25

5:37 pm-11:02 pm

1 stop5h 25m

San Antonio

Thu 3/27

5:54 am-11:24 am

1 stop5h 30m

$214

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 4/17

7:01 pm-12:30 am

1 stop5h 29m

San Antonio

Sun 4/20

5:30 am-11:45 am

1 stop6h 15m

$223

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 3/4

4:00 pm-10:16 am

1 stop18h 16m

San Antonio

Fri 3/7

1:22 pm-9:09 am

2 stops19h 47m

$263

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 3/25

1:05 pm-9:42 pm

2 stops8h 37m

San Antonio

Thu 3/27

6:45 am-12:12 pm

1 stop5h 27m

$302

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 3/20

6:38 pm-4:58 pm

1 stop22h 20m

$86

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 3/13

6:20 pm-8:40 pm

Nonstop2h 20m

$89

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 5/20

7:37 pm-5:18 pm

1 stop21h 41m

$94

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 15 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 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.

Travel insights for flights from St. Louis to San Antonio

Get recent, data-driven insights about flights from St. Louis to San Antonio including ideal travel times, pricing trends, and 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 February 14, 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, August is the cheapest month in which you can book a flight from St. Louis to San Antonio (average of $295). Flying from St. Louis 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 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 February 20, 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 at noon, which can drop the price by up to 12% 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 February 16, 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. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 20, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from St. Louis to San Antonio to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

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

    Our cheapest airline available from St. Louis to San Antonio is Frontier. Our recent data shows that you can find tickets from as low as $120 on this airline. Additional options worth looking into are Southwest and American Airlines, starting at $177 and $214 round-trip. Frontier is currently priced 65% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from St. Louis to San Antonio one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $86. Users have also found prices from $89 and $94 on Southwest and Spirit Airlines, respectively.

  • 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 $269, our data indicates the cheapest price to be $108. The most popular route (Lambert-St Louis - San Antonio), is priced around $158.

  • 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, August is the cheapest month in which you can book a flight from St. Louis to San Antonio (average of $295). Flying from St. Louis 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
New 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 St. Louis to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Dallas/Fort Worth flights
Kansas City to Hobby flights
St. Louis to Hobby flights
Kansas City to George Bush Intcntl flights
St. Louis to Dallas/Fort Worth flights
St. Louis to George Bush Intcntl flights
St. Louis to Love Field flights
St. Louis to Austin flights
Kansas City to Love Field flights
Kansas City to Austin flights
Springfield to Hobby flights
Springfield to Dallas/Fort Worth flights
Kansas City to San Antonio flights
Springfield to George Bush Intcntl flights
Springfield to San Antonio flights
St. Louis to Corpus Christi flights
Columbia to Dallas/Fort Worth flights
Springfield to Austin flights
Kansas City to El Paso flights
St. Louis to Midland flights
Joplin to Hobby flights
Joplin to Dallas/Fort Worth flights
Kansas City to Corpus Christi flights
St. Louis to Brownsville flights
St. Louis to El Paso flights
St. Louis to McAllen flights
Kansas City to Brownsville flights
Kansas City to Harlingen flights
St. Louis to Harlingen flights
Columbia to Hobby flights
Columbia to George Bush Intcntl flights
St. Louis to Abilene flights
Kansas City to Amarillo flights
Kansas City to McAllen flights
Springfield to Love Field flights
Kansas City to Beaumont flights
St. Louis to Tyler flights
St. Louis to Amarillo flights
Columbia to Austin flights
Joplin to Austin flights
Kansas City to San Angelo flights
St. Louis to Waco flights
Kansas City to Lubbock flights
Kansas City to Killeen flights
Springfield to Corpus Christi flights
Springfield to McAllen flights
St. Louis to Lubbock flights

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$205FlexibilityNo cancel feeOn-time62%
DeltaCheapest$182Average$291FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$218Average$318FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$226Average$349FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$248Average$420FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.