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St. Louis

$61+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — STL
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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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

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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 January, booked 46 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

Cheap flight deals from San Antonio to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to St. Louis (STL). 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 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$163
(CheapOair)

One-way from

$61
(CheapOair)

Popular in

October

Cheapest in

August

Average price

$478

Good round-trip deal

$368 or less

Good one-way deal

$193 or less
Provider with most accurate pricing for San Antonio-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for San Antonio-Lambert-St Louis flights.
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From San Antonio to Lambert-St Louis
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One-way flight from San Antonio to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 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 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

Find 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 October 29, 2025.

This CheapOair deal was found by Cheapflights users on 10/27. 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 11/138:38 pmSAT - STL
1 stop12h 29mFrontier
Sun 11/167:45 pmSTL - SAT
1 stop23h 45mFrontier
Deal found 10/27$163
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:26 pmSAT - STL
1 stop12h 41mFrontier
Fri 11/79:07 pmSTL - SAT
1 stop18h 28mFrontier
Deal found 10/26$176
This CheapOair deal was found by Cheapflights users on 10/28. 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 11/202:08 pmSAT - STL
1 stop21h 08mFrontier
Mon 11/247:43 pmSTL - SAT
1 stop14h 27mFrontier
Deal found 10/28$190
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/127:55 pmSAT - STL
1 stop14h 19mFrontier
Fri 12/197:43 pmSTL - SAT
1 stop28h 34mFrontier
Deal found 10/27$193
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/610:46 pmSAT - STL
1 stop15h 11mFrontier
Sat 11/87:45 pmSTL - SAT
1 stop23h 45mFrontier
Deal found 10/26$202
This Booking.com deal was found by Cheapflights users on 10/28. 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.
Sat 11/83:12 pmSAT - STL
1 stop17h 55mMultiple Airlines
Thu 11/2710:53 amSTL - SAT
1 stop7h 39mMultiple Airlines
Deal found 10/28$204
This CheapOair deal was found by Cheapflights users on 10/28. 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.
Fri 11/72:09 pmSAT - STL
1 stop25h 47mFrontier
Sun 11/97:45 pmSTL - SAT
1 stop23h 45mFrontier
Deal found 10/28$222
This CheapOair deal was found by Cheapflights users on 10/27. 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.
Fri 10/318:15 pmSAT - STL
1 stop12h 52mFrontier
Sun 11/27:45 pmSTL - SAT
1 stop23h 45mFrontier
Deal found 10/27$228
This Southwest deal was found by Cheapflights users on 10/29. 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 12/185:15 amSAT - STL
1 stop7h 30mSouthwest
Thu 1/11:50 pmSTL - SAT
1 stop6h 00mSouthwest
Deal found 10/29$239
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Wed 11/127:37 pmSAT - STL
1 stop22h 20mMultiple Airlines
Fri 11/144:56 pmSTL - SAT
2 stops21h 21mMultiple Airlines
Deal found 10/27$249
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Tue 11/183:23 pmSAT - STL
2 stops17h 44mMultiple Airlines
Tue 12/23:30 pmSTL - SAT
1 stop27h 51mMultiple Airlines
Deal found 10/28$250

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Antonio to St. Louis 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 29, 2025.
Use the filters below to find and compare flights from San Antonio to St. Louis that are best for you.

Fly from

San Antonio

Fly to

St. Louis

Route

Depart

Return

Price

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Thu 11/13

8:38 pm-9:07 am

1 stop12h 29m

Lambert-St Louis

Sun 11/16

7:45 pm-7:30 pm

1 stop23h 45m

$163

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Thu 11/20

2:08 pm-11:16 am

1 stop21h 08m

Lambert-St Louis

Mon 11/24

7:43 pm-10:10 am

1 stop14h 27m

$190

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sat 11/8

3:12 pm-9:07 am

1 stop17h 55m

Lambert-St Louis

Thu 11/27

10:53 am-6:32 pm

1 stop7h 39m

$204

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Wed 1/14

6:00 am-10:37 pm

1 stop16h 37m

Lambert-St Louis

Sun 1/18

10:42 am-9:25 am

2 stops22h 43m

$220

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Thu 12/18

5:15 am-12:45 pm

1 stop7h 30m

Lambert-St Louis

Thu 1/1

1:50 pm-7:50 pm

1 stop6h 00m

$239

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Fri 12/12

9:25 pm-12:12 pm

2 stops38h 47m

Lambert-St Louis

Fri 12/19

7:43 pm-12:17 am

1 stop28h 34m

$250

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Thu 12/4

3:06 pm-10:14 am

1 stop19h 08m

Lambert-St Louis

Mon 12/8

7:43 pm-6:59 pm

2 stops23h 16m

$254

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Wed 11/12

7:37 pm-5:57 pm

1 stop22h 20m

Lambert-St Louis

Sun 11/16

7:02 pm-9:14 am

2 stops14h 12m

$258

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Tue 11/18

3:00 pm-9:58 pm

1 stop6h 58m

Lambert-St Louis

Tue 12/2

12:49 pm-9:19 pm

1 stop8h 30m

$259

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Tue 11/25

6:13 pm-11:23 pm

1 stop5h 10m

Lambert-St Louis

Tue 12/2

12:49 pm-9:19 pm

1 stop8h 30m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 22 results
1
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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?

Use this chart to determine the optimal time to book a round-trip flight from San Antonio to St. Louis. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from San Antonio to St. Louis, you should look to book at least 46 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 $120). Flying from San Antonio to St. Louis in December is currently the most expensive (average of $248). 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?

Find hourly flight availability from San Antonio to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

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 55% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from San Antonio to St. Louis. Price data was last updated on October 26, 2025.

Travelers seeking maximum savings on their San Antonio to St. Louis flight should consider departing on Saturday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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.

Read more about SATby Ramsey Qubein
STL

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

Read more about STLby Taryn White
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on SAT

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated October 29, 2025.
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
4,241 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

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
7,992 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

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
8,999 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

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
11,032 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

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
3,124 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

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

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?

    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 $239, Frontier can have you in St. Louis from San Antonio in 7h 30m. San Antonio and St. Louis are separated by a distance of 786 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Frontier, at $119, was found to be the cheapest airline from San Antonio to St. Louis.Alternate airlines to your destination round-trip include Delta and American Airlines. Users have found that Frontier is 65% 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 Southwest, which is currently one of the cheapest options available, starting at $120. Delta flights start at $130 while deals on United Airlines start at $130 one-way.

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

    On average you can expect to pay $395 for a flight from San Antonio to St. Louis. The cheapest flight overall is $143 while the most popular route, (San Antonio - Lambert-St Louis) is currently priced at $194.

  • 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 $120). Flying from San Antonio to St. Louis in December is currently the most expensive (average of $248). 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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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.
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Top 5 airlines flying from San Antonio to St. Louis

Discover the top 5 airlines that operate flights from San Antonio to St. Louis. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$328FlexibilityNo cancel feeOn-time62%
DeltaCheapest$196Average$238FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$207Average$297FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$227Average$401FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$248Average$339FlexibilityNo cancel feeOn-time69%

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