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

Within the past month, 1 users have taken a look at flights from Lambert-St Louis to San Antonio.

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 $229 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $234 and $239 round-trip. Delta is currently priced 30% 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 Spirit Airlines. According to our data, you can fly for as low as $107. Users have also found prices from $115 and $117 on United Airlines and Frontier, 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 $442, our data indicates the cheapest price to be $143. The most popular route (Lambert-St Louis - San Antonio), is priced around $229.

What are the most popular airlines that fly from St. Louis to San Antonio?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from St. Louis to San Antonio.

What is the cheapest day to fly round-trip from St. Louis to San Antonio?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 29% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from St. Louis to San Antonio?

Travelers have found it’s best to book a flight 49 days in advance to save up to 186% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 49 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to San Antonio 1-2 weeks in advance for as low as $487, or $507 for flights within the next 24 hours.

What is the cheapest month to fly from St. Louis to San Antonio?

April can be a great time to fly to San Antonio from St. Louis with a flight ticket averaging about $330. Cheapflights users have found deals in the month of April for as cheap as $166. The most expensive prices can be found in the month of June.

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 Priceline the most. Priceline 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.

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 is 1 flight from Lambert-St Louis to San Antonio, all of which are around 2h 05m 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.

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.

$107+ Flights from St. Louis to San Antonio

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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 April or August, booked 48 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from St. Louis to San Antonio

Most accurate provider	FlightHub 3 stars
Most trusted provider	Priceline 3 stars
Round-trip from	$229 (Delta)
One-way from	$107 (Mytrip)
Popular in	June
Cheapest in	April
Average price	$327
Good round-trip deal	$352 or less
Good one-way deal	$188 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. 2% potential increase in price ($7 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in May 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 May 12, 2025.

Sat 5/175:45 pmSTL - SAT

1 stop16h 07mFrontier

Mon 5/198:31 pmSAT - STL

1 stop27h 13mFrontier

Deal found 5/11

$220

Wed 6/116:00 amSTL - SAT

1 stop5h 15mDelta

Tue 6/176:03 pmSAT - STL

1 stop5h 19mDelta

Deal found 5/12

$229

Sat 11/16:15 amSTL - SAT

1 stop4h 33mUnited Airlines

Mon 11/34:20 pmSAT - STL

1 stop5h 46mUnited Airlines

Deal found 5/12

$234

Tue 6/107:20 amSTL - SAT

1 stop5h 14mAmerican Airlines

Thu 6/126:17 pmSAT - STL

1 stop4h 43mAmerican Airlines

Deal found 5/11

$239

Mon 6/167:13 pmSTL - SAT

2 stops16h 24mSpirit Airlines

Sat 6/2112:32 pmSAT - STL

2 stops28h 32mSpirit Airlines

Deal found 5/10

$254

Thu 9/45:15 amSTL - SAT

1 stop5h 45mSouthwest

Sun 9/75:45 pmSAT - STL

2 stops6h 40mSouthwest

Deal found 5/11

$308

Wed 5/148:15 pmSTL - SAT

1 stop21h 20mMultiple Airlines

Wed 5/217:05 amSAT - STL

1 stop26h 10mMultiple Airlines

Deal found 5/11

$330

Best flights from St. Louis to San Antonio
Discover carefully curated flight deals from St. Louis to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 12, 2025.

Tue 7/15:23 pmSTL - SAT

1 stop6h 54mDelta

Sat 7/55:25 amSAT - STL

1 stop7h 10mDelta

Deal found 5/12

$229

Sat 11/16:15 amSTL - SAT

1 stop4h 33mUnited Airlines

Mon 11/34:20 pmSAT - STL

1 stop5h 46mUnited Airlines

Deal found 5/12

$234

Tue 6/105:30 amSTL - SAT

1 stop5h 14mAmerican Airlines

Thu 6/125:00 amSAT - STL

1 stop4h 18mAmerican Airlines

Deal found 5/12

$239

Thu 9/187:52 pmSTL - SAT

1 stop18h 08mFrontier

Sun 9/211:53 pmSAT - STL

1 stop30h 19mFrontier

Deal found 5/12

$240

Mon 6/167:13 pmSTL - SAT

2 stops16h 24mSpirit Airlines

Sat 6/2112:32 pmSAT - STL

2 stops28h 32mSpirit Airlines

Deal found 5/10

$254

Wed 7/910:45 amSTL - SAT

Nonstop2h 05mSouthwest

Wed 7/165:00 amSAT - STL

Nonstop2h 10mSouthwest

Deal found 5/12

$285

Fri 6/206:36 pmSTL - SAT

2 stops17h 01mMultiple Airlines

Sun 6/226:13 pmSAT - STL

2 stops24h 28mMultiple Airlines

Deal found 5/12

$293

Tue 5/276:22 pmSTL - SAT

1 stop10h 48mAlaska Airlines

Sat 5/312:29 pmSAT - STL

2 stops23h 38mAlaska Airlines

Deal found 5/12

$1,029

Last-minute flights from St. Louis to San Antonio
Discover last-minute flight deals from St. Louis to San Antonio. Data last updated May 12, 2025 and is based on user searches.

Sat 5/175:45 pmSTL - SAT

1 stop16h 07mFrontier

Mon 5/198:31 pmSAT - STL

1 stop27h 13mFrontier

Deal found 5/11

$220

Tue 5/2012:15 pmSTL - SAT

3 stops34h 36mMultiple Airlines

Thu 5/226:03 pmSAT - STL

2 stops24h 38mMultiple Airlines

Deal found 5/11

$534

Tue 5/209:29 amSTL - SAT

1 stop8h 23mAmerican Airlines

Thu 5/2212:20 pmSAT - STL

1 stop7h 09mAmerican Airlines

Deal found 5/11

$728

Tue 5/205:05 pmSTL - SAT

Nonstop2h 15mSouthwest

Wed 5/219:40 amSAT - STL

1 stop3h 35mSouthwest

Deal found 5/12

$765

Wed 5/213:43 pmSTL - SAT

1 stop7h 16mUnited Airlines

Sat 5/246:01 pmSAT - STL

2 stops15h 55mUnited Airlines

Deal found 5/11

$668

Tue 5/276:22 pmSTL - SAT

1 stop10h 48mAlaska Airlines

Sat 5/312:29 pmSAT - STL

2 stops23h 38mAlaska Airlines

Deal found 5/12

$1,029

Thu 6/55:05 amSTL - SAT

1 stop3h 35mSouthwest

Mon 6/97:15 amSAT - STL

Nonstop2h 10mSouthwest

Deal found 5/12

$322

Tue 6/105:30 amSTL - SAT

1 stop5h 14mAmerican Airlines

Thu 6/125:00 amSAT - STL

1 stop4h 18mAmerican Airlines

Deal found 5/12

$239

Wed 6/116:00 amSTL - SAT

1 stop5h 15mDelta

Tue 6/176:03 pmSAT - STL

1 stop5h 19mDelta

Deal found 5/12

$229

Wed 6/115:00 amSTL - SAT

1 stop7h 23mUnited Airlines

Tue 6/175:30 amSAT - STL

2 stops9h 23mUnited Airlines

Deal found 5/12

$304

Mon 6/167:13 pmSTL - SAT

2 stops16h 24mSpirit Airlines

Sat 6/2112:32 pmSAT - STL

2 stops28h 32mSpirit Airlines

Deal found 5/10

$254

Fri 6/206:36 pmSTL - SAT

2 stops17h 01mMultiple Airlines

Sun 6/226:13 pmSAT - STL

2 stops24h 28mMultiple Airlines

Deal found 5/12

$293

One-way flights from St. Louis to San Antonio
Search for one-way flight options from St. Louis to San Antonio. Find affordable one-way fares based on user searches. Data last updated May 12, 2025.

Thu 6/126:36 pmSTL - SAT

2 stops17h 01mSpirit Airlines

Deal found 5/11

$107

Sat 7/121:42 pmSTL - SAT

1 stop7h 15mUnited Airlines

Deal found 5/12

$115

Thu 5/295:45 pmSTL - SAT

1 stop16h 02mFrontier

Deal found 5/11

$117

Thu 6/267:10 pmSTL - SAT

1 stop5h 07mDelta

Deal found 5/11

$125

Tue 7/156:40 pmSTL - SAT

Nonstop2h 05mSouthwest

Deal found 5/12

$143

Thu 6/199:50 amSTL - SAT

2 stops7h 28mMultiple Airlines

Deal found 5/11

$159

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sat 5/17

5:45 pm-9:52 am

1 stop16h 07m

San Antonio

Mon 5/19

8:31 pm-11:44 pm

1 stop27h 13m

$220

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Wed 6/11

6:00 am-11:15 am

1 stop5h 15m

San Antonio

Tue 6/17

6:03 pm-11:22 pm

1 stop5h 19m

$229

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Tue 6/10

5:30 am-10:44 am

1 stop5h 14m

San Antonio

Thu 6/12

5:00 am-9:18 am

1 stop4h 18m

$239

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Mon 6/16

7:13 pm-11:37 am

2 stops16h 24m

San Antonio

Sat 6/21

12:32 pm-5:04 pm

2 stops28h 32m

$254

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Wed 6/11

5:00 am-12:23 pm

1 stop7h 23m

San Antonio

Tue 6/17

5:30 am-2:53 pm

2 stops9h 23m

$304

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 6/5

5:05 am-8:40 am

1 stop3h 35m

San Antonio

Mon 6/9

7:15 am-9:25 am

Nonstop2h 10m

$322

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 6/5

10:10 am-8:56 am

2 stops22h 46m

San Antonio

Mon 6/9

10:51 pm-6:41 pm

3 stops19h 50m

$324

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 6/12

6:36 pm-11:37 am

2 stops17h 01m

$107

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Sat 8/9

7:00 am-1:54 pm

1 stop6h 54m

$115

St. LouisSan Antonio

STL - SAT

STLSAT

Lambert-St Louis

Thu 5/29

5:45 pm-9:47 am

1 stop16h 02m

$117

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 14 results

Compare providers for flights from St. Louis to San Antonio

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 May.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy2 stars	Trust Score*3 stars
Gotogate	Price Accuracy3 stars	Trust 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 Priceline the most. Priceline 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?

Booking 48 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?

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 16% versus a flight in the evening.

What is the cheapest day to fly from St. Louis to San Antonio?

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.

Rainfall in San Antonio 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

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

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest 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.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,290 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,950 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,724 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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 is 1 flight from Lambert-St Louis to San Antonio, all of which are around 2h 05m 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, 1 users have taken a look at flights from Lambert-St Louis to San Antonio.
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 $229 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $234 and $239 round-trip. Delta is currently priced 30% 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 Spirit Airlines. According to our data, you can fly for as low as $107. Users have also found prices from $115 and $117 on United Airlines and Frontier, 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 $442, our data indicates the cheapest price to be $143. The most popular route (Lambert-St Louis - San Antonio), is priced around $229.
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

New Braunfels

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to San Antonio

St. Louis to Dallas/Fort Worth flights

Kansas City to Dallas/Fort Worth flights

St. Louis to Hobby flights

Kansas City to Hobby flights

St. Louis to George Bush Intcntl flights

Kansas City to George Bush Intcntl flights

Kansas City to Austin flights

Kansas City to San Antonio flights

Kansas City to Love Field flights

St. Louis to Love Field flights

Springfield to Hobby flights

Springfield to George Bush Intcntl flights

St. Louis to Austin flights

Springfield to Austin flights

Springfield to Dallas/Fort Worth flights

Columbia to Dallas/Fort Worth flights

Kansas City to El Paso flights

Springfield to San Antonio flights

Joplin to Austin flights

St. Louis to El Paso flights

Joplin to Dallas/Fort Worth flights

St. Louis to McAllen flights

Kansas City to Lubbock flights

St. Louis to Amarillo flights

Kansas City to Brownsville flights

Springfield to El Paso flights

St. Louis to Corpus Christi flights

Kansas City to Harlingen flights

St. Louis to Brownsville flights

Kansas City to Corpus Christi flights

Kansas City to McAllen flights

St. Louis to Lubbock flights

Springfield to Love Field flights

Kansas City to Amarillo flights

Columbia to San Antonio flights

Columbia to Hobby flights

Springfield to Corpus Christi flights

Springfield to Texarkana flights

St. Louis to Abilene flights

St. Louis to Waco flights

Joplin to George Bush Intcntl flights

St. Louis to Harlingen flights

St. Louis to Midland flights

Columbia to George Bush Intcntl flights

Columbia to Austin flights

St. Louis to Killeen flights

St. Louis to Longview flights

Branson to Austin flights

St. Louis to Tyler flights

Other flights to San Antonio

Top 5 airlines flying from St. Louis to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$128	Average$208	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$167	Average$283	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$197	Average$391	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$204	Average$326	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$218	Average$311	FlexibilityNo cancel fee	On-time69%

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.

$107+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to San Antonio with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to San Antonio are usually found in April or August, booked 48 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from St. Louis to San Antonio

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 May 12, 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 May 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to San Antonio that are best for you.

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 May.

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.

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 May 9, 2025.

What is the cheapest month to book a flight from St. Louis to San Antonio?

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 May 12, 2025.

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 May 11, 2025.

Rainfall in San Antonio by month

Plan your trip to San Antonio by taking into account the average rainfall totals by month.

Temperature in San Antonio by month

Plan your trip to San Antonio by taking into account the average temperature totals by month.

Reviews of airlines servicing San Antonio

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest 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.

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?

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

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

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

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

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

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

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

What is the cheapest month to book a flight from St. Louis to San Antonio?

Traveling to a place near St. Louis?

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.

Top 5 airlines flying from St. Louis to San Antonio

100% Free

Book with Flexibility

Travel Smart

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 May 12, 2025.