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

This flight path from San Antonio to Lambert-St Louis was viewed by 9 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

For as low as $213, Frontier can have you in St. Louis from San Antonio in 26h 54m. San Antonio and St. Louis are separated by a distance of 786 mi.

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

Frontier, at $109, was found to be the cheapest airline from San Antonio to St. Louis.Alternate airlines to your destination round-trip include American Airlines and Delta. Users have found that Frontier is 68% cheaper than the other options available to this destination.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $76. American Airlines flights start at $98 while deals on Delta start at $113 one-way.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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

On average you can expect to pay $394 for a flight from San Antonio to St. Louis. The cheapest flight overall is $213 while the most popular route, (San Antonio - Lambert-St Louis) is currently priced at $205.

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

Southwest, American Airlines and United Airlines are the most popular airlines when flying from San Antonio to St. Louis.

Most accurate provider : When it comes to deals on San Antonio-St. Louis flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on San Antonio-St. Louis flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from San Antonio-St. Louis flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on San Antonio-St. Louis flights, Cheapflights users trust CheapOair the most. CheapOair 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 San Antonio-St. Louis 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 San Antonio to St. Louis?

You will need to book a flight from San Antonio to Lambert-St Louis if you want to fly from San Antonio to St. Louis. At least 5 different airlines have flights from San Antonio (SAT) to Lambert-St Louis (STL) on a regular basis. There is 1 flight to St. Louis from the San Antonio airport per day. If you manage to book one that is nonstop, then you can expect the flight time from SAT to STL to be around 2h 05m.

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

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

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

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

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

Yes. Cheapflights offers flight deals from San Antonio to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$70+ Flights from San Antonio to St. Louis

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

Find cheap flights from San Antonio to St. Louis 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

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Cheapflights Tip: The best prices from San Antonio to Lambert-St Louis are usually found in August or February, booked 85 days in advance, depart on a Monday or Wednesday and return on a Saturday

Cheap flight deals from San Antonio to St. Louis

Cheapest flights from San Antonio to St. Louis
Explore the most affordable flight options available from San Antonio to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Sat 12/275:48 pmSAT - STL

1 stop6h 08mAmerican Airlines

Tue 1/611:55 amSTL - SAT

1 stop4h 50mAmerican Airlines

Deal found 12/26

$351

Sat 12/275:15 amSAT - STL

1 stop4h 34mUnited Airlines

Tue 1/611:20 amSTL - SAT

2 stops8h 21mUnited Airlines

Deal found 12/26

$356

Sun 12/2812:56 pmSAT - STL

1 stop4h 14mAmerican Airlines

Sat 1/36:44 pmSTL - SAT

1 stop4h 15mAmerican Airlines

Deal found 12/27

$421

Wed 12/312:08 pmSAT - STL

1 stop7h 35mUnited Airlines

Fri 1/211:05 amSTL - SAT

2 stops8h 36mUnited Airlines

Deal found 12/27

$426

Sun 12/284:25 pmSAT - STL

1 stop6h 10mSouthwest

Sat 1/39:45 amSTL - SAT

2 stops6h 10mSouthwest

Deal found 12/27

$461

Mon 12/292:08 pmSAT - STL

1 stop5h 10mUnited Airlines

Fri 1/25:02 pmSTL - SAT

1 stop6h 10mUnited Airlines

Deal found 12/27

$491

Sat 12/276:05 pmSAT - STL

1 stop4h 45mSouthwest

Tue 1/610:25 amSTL - SAT

Nonstop2h 25mSouthwest

Deal found 12/26

$655

Best flights from San Antonio to St. Louis
Discover carefully curated flight deals from San Antonio to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Fri 1/238:24 pmSAT - STL

1 stop18h 22mMultiple Airlines

Fri 1/305:42 pmSTL - SAT

1 stop30h 10mMultiple Airlines

Deal found 12/26

$175

Sun 1/183:57 pmSAT - STL

1 stop26h 54mFrontier

Sun 1/259:27 pmSTL - SAT

1 stop14h 58mFrontier

Deal found 12/26

$213

Sat 1/247:00 amSAT - STL

1 stop7h 28mUnited Airlines

Sat 1/314:49 pmSTL - SAT

1 stop6h 24mUnited Airlines

Deal found 12/27

$259

Sat 4/45:10 amSAT - STL

1 stop6h 57mDelta

Mon 4/66:59 pmSTL - SAT

1 stop5h 39mDelta

Deal found 12/27

$269

Thu 2/198:25 pmSAT - STL

1 stop16h 44mMultiple Airlines

Tue 2/243:49 pmSTL - SAT

1 stop8h 10mMultiple Airlines

Deal found 12/27

$206

Mon 1/266:30 amSAT - STL

1 stop17h 03mMultiple Airlines

Mon 2/25:42 pmSTL - SAT

1 stop30h 10mMultiple Airlines

Deal found 12/27

$210

Fri 4/36:32 amSAT - STL

1 stop7h 52mDelta

Sun 4/56:29 amSTL - SAT

1 stop6h 18mDelta

Deal found 12/27

$279

Fri 2/1310:48 pmSAT - STL

1 stop18h 58mMultiple Airlines

Sun 2/153:49 pmSTL - SAT

1 stop8h 10mMultiple Airlines

Deal found 12/27

$257

Sat 1/246:30 amSAT - STL

1 stop17h 03mMultiple Airlines

Sat 1/318:22 pmSTL - SAT

2 stops37h 08mMultiple Airlines

Deal found 12/27

$267

Last-minute flights from San Antonio to St. Louis
Discover last-minute flight deals from San Antonio to St. Louis. Data last updated December 28, 2025 and is based on user searches.

Fri 1/26:45 amSAT - STL

1 stop27h 17mFrontier

Wed 1/77:43 pmSTL - SAT

1 stop13h 35mFrontier

Deal found 12/25

$239

Tue 1/610:32 amSAT - STL

1 stop5h 42mAmerican Airlines

Sat 1/173:54 pmSTL - SAT

1 stop4h 57mAmerican Airlines

Deal found 12/27

$305

Sun 1/183:57 pmSAT - STL

1 stop26h 54mFrontier

Sun 1/259:27 pmSTL - SAT

1 stop14h 58mFrontier

Deal found 12/26

$213

Thu 1/228:24 pmSAT - STL

1 stop22h 20mFrontier

Thu 1/2910:01 pmSTL - SAT

1 stop23h 03mFrontier

Deal found 12/26

$163

Fri 1/238:24 pmSAT - STL

1 stop18h 22mMultiple Airlines

Fri 1/305:42 pmSTL - SAT

1 stop30h 10mMultiple Airlines

Deal found 12/26

$175

Sat 1/247:00 amSAT - STL

1 stop7h 28mUnited Airlines

Sat 1/314:49 pmSTL - SAT

1 stop6h 24mUnited Airlines

Deal found 12/27

$259

Sat 1/246:30 amSAT - STL

1 stop17h 03mMultiple Airlines

Sat 1/318:22 pmSTL - SAT

2 stops37h 08mMultiple Airlines

Deal found 12/27

$267

Mon 1/2610:35 amSAT - STL

2 stops36h 58mMultiple Airlines

Mon 2/25:42 pmSTL - SAT

1 stop30h 10mMultiple Airlines

Deal found 12/27

$206

One-way flights from San Antonio to St. Louis
Search for one-way flight options from San Antonio to St. Louis. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Sat 2/282:13 pmSAT - STL

1 stop9h 46mFrontier

Deal found 12/25

$70

Fri 2/2710:53 amSAT - STL

1 stop10h 33mFrontier

Deal found 12/26

$79

Fri 1/238:24 pmSAT - STL

1 stop18h 22mFrontier

Deal found 12/26

$85

Mon 2/231:57 pmSAT - STL

1 stop10h 02mFrontier

Deal found 12/25

$86

Thu 2/261:57 pmSAT - STL

1 stop10h 02mFrontier

Deal found 12/25

$87

Tue 1/276:30 amSAT - STL

1 stop17h 03mMultiple Airlines

Deal found 12/26

$97

Sun 1/258:24 pmSAT - STL

1 stop16h 26mFrontier

Deal found 12/26

$102

Mon 1/57:11 pmSAT - STL

1 stop27h 22mFrontier

Deal found 12/26

$108

Tue 2/2410:26 amSAT - STL

2 stops20h 25mMultiple Airlines

Deal found 12/26

$110

Find flight deals from San Antonio to St. Louis

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$163 (CheapOair)
One-way from	$70 (Frontier)
Popular in	November
Cheapest in	August
Average price	$363
Good round-trip deal	$478 or less
Good one-way deal	$229 or less

Provider with most accurate pricing for San Antonio-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for San Antonio-Lambert-St Louis flights.

Search Deals

From San Antonio to Lambert-St Louis

Search Deals

One-way flight from San Antonio to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 20% potential increase in price ($92 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from San Antonio to Lambert-St Louis.

Search Deals

Price to beat on a one-way flight from San Antonio to Lambert-St Louis.

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Fri 1/23

8:24 pm-2:46 pm

1 stop18h 22m

Lambert-St Louis

Fri 1/30

5:42 pm-11:52 pm

1 stop30h 10m

$175

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Thu 2/19

8:25 pm-1:09 pm

1 stop16h 44m

Lambert-St Louis

Tue 2/24

3:49 pm-11:59 pm

1 stop8h 10m

$206

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Mon 1/26

6:30 am-11:33 pm

1 stop17h 03m

Lambert-St Louis

Mon 2/2

5:42 pm-11:52 pm

1 stop30h 10m

$210

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sun 1/18

3:57 pm-6:51 pm

1 stop26h 54m

Lambert-St Louis

Sun 1/25

9:27 pm-12:25 pm

1 stop14h 58m

$213

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Fri 2/13

10:48 pm-5:46 pm

1 stop18h 58m

Lambert-St Louis

Sun 2/15

3:49 pm-11:59 pm

1 stop8h 10m

$257

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sat 1/24

7:00 am-2:28 pm

1 stop7h 28m

Lambert-St Louis

Sat 1/31

4:49 pm-11:13 pm

1 stop6h 24m

$259

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sat 1/24

6:30 am-11:33 pm

1 stop17h 03m

Lambert-St Louis

Sat 1/31

8:22 pm-9:30 am

2 stops37h 08m

$267

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sat 4/4

5:10 am-12:07 pm

1 stop6h 57m

Lambert-St Louis

Mon 4/6

6:59 pm-12:38 am

1 stop5h 39m

$269

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Fri 4/3

6:32 am-2:24 pm

1 stop7h 52m

Lambert-St Louis

Sun 4/5

6:29 am-12:47 pm

1 stop6h 18m

$279

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sat 2/28

2:13 pm-11:59 pm

1 stop9h 46m

$70

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 19 results

Compare providers for flights from San Antonio to St. Louis

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to St. Louis in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
CheapOair	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust 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 San Antonio-St. Louis flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on San Antonio-St. Louis flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from San Antonio-St. Louis flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on San Antonio-St. Louis flights, Cheapflights users trust CheapOair the most. CheapOair 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 San Antonio-St. Louis 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 San Antonio to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from San Antonio 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 San Antonio to St. Louis

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

To ensure you get the cheapest price possible for a flight from San Antonio to St. Louis, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, May is the cheapest month in which you can book a flight from San Antonio to St. Louis (average of $119). Flying from San Antonio to St. Louis in December is currently the most expensive (average of $217). 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 SAT to STL?

When flying from San Antonio to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 61% versus a flight at noon.

The best insider tips for San Antonio to St. Louis flights

Cheapflights partnered with top experts to bring you the best recommendations for your San Antonio to St. Louis trip

Airports

SAT

For longer trips, consider the economy lots with shuttle service for better value than the main parking garage.

STL

Use the MetroLink light rail for a convenient and economical trip from STL to downtown St. Louis.

Our travel experts

Ramsey Qubein

Expert on SAT

Taryn White

Expert on STL

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and United Airlines from San Antonio to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest

8.0

Very good

4,256 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta

7.9

Good

8,019 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

9,113 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines

7.2

Good

11,072 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Frontier

5.8

Fair

3,065 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

What airports do I use to fly from San Antonio to St. Louis?
You will need to book a flight from San Antonio to Lambert-St Louis if you want to fly from San Antonio to St. Louis. At least 5 different airlines have flights from San Antonio (SAT) to Lambert-St Louis (STL) on a regular basis. There is 1 flight to St. Louis from the San Antonio airport per day. If you manage to book one that is nonstop, then you can expect the flight time from SAT to STL to be around 2h 05m.
How popular is this San Antonio to St. Louis flight route?
This flight path from San Antonio to Lambert-St Louis was viewed by 9 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from San Antonio to St. Louis?
For as low as $213, Frontier can have you in St. Louis from San Antonio in 26h 54m. San Antonio and St. Louis are separated by a distance of 786 mi.
What are the cheapest airlines flying from San Antonio to St. Louis round-trip?
Frontier, at $109, was found to be the cheapest airline from San Antonio to St. Louis.Alternate airlines to your destination round-trip include American Airlines and Delta. Users have found that Frontier is 68% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from San Antonio to St. Louis one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $76. American Airlines flights start at $98 while deals on Delta start at $113 one-way.
What are the cheapest flights from San Antonio to St. Louis?
On average you can expect to pay $394 for a flight from San Antonio to St. Louis. The cheapest flight overall is $213 while the most popular route, (San Antonio - Lambert-St Louis) is currently priced at $205.
Can I find deals for flights from San Antonio to St. Louis that include hotel bookings?
Yes. In addition to deals on San Antonio to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Antonio to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to St. Louis.
Can I find deals for business class flights from San Antonio to St. Louis?
Yes. Cheapflights offers flight deals from San Antonio to St. Louis 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 San Antonio to St. Louis?
Currently, May is the cheapest month in which you can book a flight from San Antonio to St. Louis (average of $119). Flying from San Antonio to St. Louis in December is currently the most expensive (average of $217). 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

Edwardsville

O'Fallon

Swansea

Fairview Heights

Maryland Heights

Collinsville

Eureka

Glencoe

Chesterfield

Alton

Farmington

Festus

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from San Antonio to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$119	Average$288	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$196	Average$258	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$196	Average$238	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$227	Average$394	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$248	Average$325	FlexibilityNo cancel fee	On-time69%

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$70+ Cheap flights from San Antonio to St. Louis (SAT - STL)

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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Antonio to St. Louis 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 San Antonio to Lambert-St Louis are usually found in August or February, booked 85 days in advance, depart on a Monday or Wednesday and return on a Saturday

Cheap flight deals from San Antonio to St. Louis

Cheapest flights from San Antonio to St. LouisExplore the most affordable flight options available from San Antonio to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Explore the most affordable flight options available from San Antonio to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Find flight deals from San Antonio to St. Louis

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

Cheapflights Fare Finder

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

Compare providers for flights from San Antonio to St. Louis

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 San Antonio to St. Louis in December.

Best time to book a flight from San Antonio to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from San Antonio with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from San Antonio to St. Louis

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

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

What is the cheapest time of day to fly from SAT to STL?

The best insider tips for San Antonio to St. Louis flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your San Antonio to St. Louis trip

Airports

SAT

STL

Our travel experts

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and United Airlines from San Antonio to St. Louis have to say. 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 San Antonio to St. Louis. 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 San Antonio to St. Louis?

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

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

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

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

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

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

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

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

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

Traveling to a place near St. Louis?

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Alternative routes for San Antonio to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from San Antonio to St. Louis

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Cheapest flights from San Antonio to St. Louis
Explore the most affordable flight options available from San Antonio to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.