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St. Louis

$99+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to Lambert-St Louis are usually found in February or September, 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 June 12, 2025.

Round-trip from

$209
(American Airlines)

One-way from

$99
(Southwest)

Popular in

November

Cheapest in

February

Average price

$379

Good round-trip deal

$288 or less

Good one-way deal

$208 or less
From San Antonio to Lambert-St Louis
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One-way flight from San Antonio to Lambert-St Louis
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Highest demand for flights based on searches. 11% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from San Antonio to Lambert-St Louis.
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Price to beat on a one-way flight from San Antonio to Lambert-St Louis.
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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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 8/66:45 pmSAT - STL
1 stop4h 29mAmerican Airlines
Sun 8/105:15 amSTL - SAT
1 stop4h 02mAmerican Airlines
Deal found 6/10$209
This Delta deal was found by Cheapflights users on 6/12. 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.
Tue 7/295:25 amSAT - STL
1 stop7h 09mDelta
Tue 7/295:23 pmSTL - SAT
1 stop6h 51mDelta
Deal found 6/12$229
This FlightHub deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/107:10 amSAT - STL
1 stop9h 21mSpirit Airlines
Thu 7/175:26 pmSTL - SAT
1 stop7h 08mSpirit Airlines
Deal found 6/10$231
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/115:38 pmSAT - STL
1 stop20h 21mMultiple Airlines
Sun 7/1310:47 amSTL - SAT
1 stop21h 17mMultiple Airlines
Deal found 6/11$256
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/15:38 pmSAT - STL
1 stop20h 21mFrontier
Sun 8/32:36 pmSTL - SAT
1 stop26h 16mFrontier
Deal found 6/11$263
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/265:30 amSAT - STL
2 stops10h 14mUnited Airlines
Fri 8/296:15 amSTL - SAT
1 stop7h 07mUnited Airlines
Deal found 6/10$308
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/295:55 amSAT - STL
2 stops5h 50mSouthwest
Tue 7/295:45 pmSTL - SAT
1 stop5h 05mSouthwest
Deal found 6/12$362
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/237:37 pmSAT - STL
2 stops13h 41mAlaska Airlines
Fri 6/277:32 pmSTL - SAT
1 stop10h 08mAlaska Airlines
Deal found 6/10$1,159

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 June 12, 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

Wed 8/6

6:45 pm-11:14 pm

1 stop4h 29m

Lambert-St Louis

Sun 8/10

5:15 am-9:17 am

1 stop4h 02m

$209

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Tue 7/29

5:25 am-12:34 pm

1 stop7h 09m

Lambert-St Louis

Tue 7/29

5:23 pm-12:14 am

1 stop6h 51m

$229

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Thu 7/10

7:10 am-4:31 pm

1 stop9h 21m

Lambert-St Louis

Thu 7/17

5:26 pm-12:34 am

1 stop7h 08m

$231

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Fri 7/11

5:38 pm-1:59 pm

1 stop20h 21m

Lambert-St Louis

Sun 7/13

10:47 am-8:04 am

1 stop21h 17m

$256

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Fri 8/1

5:38 pm-1:59 pm

1 stop20h 21m

Lambert-St Louis

Sun 8/3

2:36 pm-4:52 pm

1 stop26h 16m

$263

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Tue 8/26

5:30 am-3:44 pm

2 stops10h 14m

Lambert-St Louis

Fri 8/29

6:15 am-1:22 pm

1 stop7h 07m

$308

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Tue 7/29

5:55 am-11:45 am

2 stops5h 50m

Lambert-St Louis

Tue 7/29

5:45 pm-10:50 pm

1 stop5h 05m

$362

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Mon 6/23

7:37 pm-9:18 am

2 stops13h 41m

Lambert-St Louis

Fri 6/27

7:32 pm-5:40 am

1 stop10h 08m

$1,159

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Mon 8/25

5:00 am-7:10 am

Nonstop2h 10m

$99

San AntonioSt. Louis

SAT - STL

SATSTL

San Antonio

Sat 7/12

7:35 pm-12:14 am

1 stop4h 39m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 16 results
1
2

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 June 9, 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 June 12, 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 June 8, 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

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.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

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).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from San Antonio to St. Louis 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

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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

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 10m.

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

    This flight path from San Antonio to Lambert-St Louis was viewed by 5 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 $209, was found to be the cheapest airline from San Antonio to St. Louis.Alternate airlines to your destination round-trip include Delta and Spirit Airlines. Users have found that American Airlines is 38% 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 $99. American Airlines flights start at $100 while deals on Spirit Airlines start at $107 one-way.

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

    On average you can expect to pay $341 for a flight from San Antonio to St. Louis. The cheapest flight overall is $183 while the most popular route, (San Antonio - Lambert-St Louis) is currently priced at $214.

  • 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 San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$202FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$254FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$211Average$347FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$227Average$405FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$248Average$328FlexibilityNo cancel feeOn-time69%

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