HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$86+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — STL
ago. 18 — ago. 251
lun. 8/18
lun. 8/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

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 San Antonio to Lambert-St Louis are usually found in February or August, booked 46 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

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 agosto 13, 2025.

Round-trip from

$173
(American Airlines)

One-way from

$87
(American Airlines)

Popular in

November

Cheapest in

February

Average price

$298

Good round-trip deal

$217 or less

Good one-way deal

$145 or less
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. 12% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 agosto 13, 2025.

This American Airlines deal was found by Cheapflights users on 8/11. 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.
sáb. 10/256:03 amSAT - STL
1 stop7h 32mAmerican Airlines
mar. 10/282:15 pmSTL - SAT
1 stop7h 33mAmerican Airlines
Deal found 8/11$173
This American Airlines deal was found by Cheapflights users on 8/11. 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.
lun. 9/811:11 amSAT - STL
1 stop7h 30mAmerican Airlines
mié. 9/109:57 amSTL - SAT
1 stop5h 52mAmerican Airlines
Deal found 8/11$183
This United Airlines deal was found by Cheapflights users on 8/11. 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.
vie. 9/55:30 amSAT - STL
1 stop4h 27mUnited Airlines
lun. 9/158:20 amSTL - SAT
1 stop7h 06mUnited Airlines
Deal found 8/11$193
This Delta deal was found by Cheapflights users on 8/11. 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.
mar. 12/28:00 amSAT - STL
1 stop4h 57mDelta
vie. 12/57:05 pmSTL - SAT
1 stop5h 20mDelta
Deal found 8/11$197
This Delta deal was found by Cheapflights users on 8/12. 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.
mar. 12/25:20 amSAT - STL
1 stop8h 00mDelta
mié. 12/107:20 amSTL - SAT
1 stop5h 58mDelta
Deal found 8/12$199
This Southwest deal was found by Cheapflights users on 8/11. 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.
lun. 9/83:35 pmSAT - STL
1 stop3h 40mSouthwest
mié. 9/103:45 pmSTL - SAT
Nonstop2h 10mSouthwest
Deal found 8/11$201
This American Airlines deal was found by Cheapflights users on 8/11. 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.
jue. 12/48:03 amSAT - STL
1 stop5h 56mAmerican Airlines
lun. 12/84:08 pmSTL - SAT
1 stop3h 52mAmerican Airlines
Deal found 8/11$206
This Delta deal was found by Cheapflights users on 8/12. 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.
mar. 12/212:50 pmSAT - STL
1 stop7h 45mDelta
lun. 12/87:05 pmSTL - SAT
1 stop5h 20mDelta
Deal found 8/12$213
This Southwest deal was found by Cheapflights users on 8/11. 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.
dom. 9/218:20 pmSAT - STL
1 stop4h 05mSouthwest
mié. 9/241:20 pmSTL - SAT
1 stop4h 05mSouthwest
Deal found 8/11$215
This Southwest deal was found by Cheapflights users on 8/13. 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.
jue. 9/115:00 amSAT - STL
Nonstop2h 10mSouthwest
lun. 9/157:10 pmSTL - SAT
Nonstop2h 05mSouthwest
Deal found 8/13$217

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 agosto 13, 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

sáb. 10/25

6:03 am-1:35 pm

1 stop7h 32m

Lambert-St Louis

mar. 10/28

2:15 pm-9:48 pm

1 stop7h 33m

$173

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

lun. 9/8

5:58 pm-10:08 pm

1 stop4h 10m

Lambert-St Louis

lun. 9/15

6:15 am-1:22 pm

1 stop7h 07m

$193

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

jue. 9/4

6:49 pm-10:50 pm

1 stop4h 01m

Lambert-St Louis

jue. 9/11

5:18 am-9:30 am

1 stop4h 12m

$193

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

sáb. 10/25

6:25 am-11:34 am

1 stop5h 09m

Lambert-St Louis

dom. 10/26

6:52 pm-12:20 am

1 stop5h 28m

$197

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

mié. 12/3

5:20 am-1:20 pm

1 stop8h 00m

Lambert-St Louis

sáb. 12/6

4:50 pm-12:05 am

1 stop7h 15m

$197

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

mar. 9/9

7:22 am-1:09 pm

1 stop5h 47m

Lambert-St Louis

mar. 9/16

8:17 am-3:49 pm

1 stop7h 32m

$197

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

mié. 12/3

5:50 pm-11:02 pm

1 stop5h 12m

Lambert-St Louis

mié. 12/10

6:00 am-1:18 pm

1 stop7h 18m

$197

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

mié. 12/3

5:20 am-1:20 pm

1 stop8h 00m

Lambert-St Louis

vie. 12/5

7:05 pm-12:25 am

1 stop5h 20m

$197

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

mié. 12/3

5:30 am-12:57 pm

1 stop7h 27m

Lambert-St Louis

mar. 12/9

6:45 am-3:01 pm

1 stop8h 16m

$197

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

mar. 12/2

6:45 am-12:57 pm

1 stop6h 12m

Lambert-St Louis

mar. 12/9

6:45 am-3:01 pm

1 stop8h 16m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 24 results
1
2
3

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

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 August 8, 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, August is the cheapest month in which you can book a flight from San Antonio to St. Louis (average of $311). Flying from San Antonio to St. Louis in March is currently the most expensive (average of $356). 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 agosto 13, 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 64% 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 August 10, 2025.

Travelers seeking maximum savings on their San Antonio to St. Louis flight should consider departing on Monday 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.

What’s the top layover airport for flights from San Antonio to St. Louis?

Share of 1-stop round-trip flights from San Antonio to St. Louis chosen by Cheapflights users in the past 12 months, using the same layover each way.

Orlando (MCO) – chosen by Cheapflights users on 67% of 1-stop itineraries from San Antonio to St. Louis on Cheapflights.

What’s the cheapest layover airport for flights from San Antonio to St. Louis?

Average round-trip fare for 1-stop flights from San Antonio to St. Louis, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Orlando (MCO) is the most affordable 1-stop option, with an average round-trip price of $439.

What’s the fastest layover option from San Antonio to St. Louis?

Shortest average travel time for 1-stop one-way flights from San Antonio to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Orlando (MCO) have the shortest average one-way travel time for 1-stop routes: 15h 07m.

Which airport typically offers the quickest layover for flights from San Antonio to St. Louis?

Average layover duration for 1-stop one-way flights from San Antonio to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Orlando (MCO) offer the fastest connection on this route, with an average layover time of 12h 04m.

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 agosto 13, 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
4,246 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
8,920 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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
3,221 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

Boarding

8.1

Food

7.0

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 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    American Airlines, at $173, was found to be the cheapest airline from San Antonio to St. Louis. An alternate airline flying to your destination would be Delta. Users have found that American Airlines is 48% cheaper than the other options available to this destination.

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

    On average you can expect to pay $302 for a flight from San Antonio to St. Louis. The cheapest flight overall is $92 while the most popular route, (San Antonio - Lambert-St Louis) is currently priced at $188.

  • 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, August is the cheapest month in which you can book a flight from San Antonio to St. Louis (average of $311). Flying from San Antonio to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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 San Antonio to St. Louis

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

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 agosto 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$211FlexibilityNo cancel feeOn-time62%
DeltaCheapest$165Average$238FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$193Average$329FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$216Average$352FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$227Average$408FlexibilityNo 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.