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Cheap flights from St. Louis to San Antonio from $106

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to San Antonio departing on 4/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to San Antonio

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to San Antonio.
Frontier Logo
6:58 pm - 4:52 pmSTL-SAT
21h 54m1 stop
Frontier Logo
7:59 pm - 12:04 amSAT-STL
28h 05m1 stop
$200Frontier
Find Deal
Wed, Apr 23 - Fri, Apr 25
Frontier Logo
12:41 pm - 7:46 pmSTL-SAT
7h 05m1 stop
Frontier Logo
1:37 pm - 9:05 pmSAT-STL
7h 28m1 stop
$208Frontier
Find Deal
Sun, Apr 20 - Thu, Apr 24
Delta Logo
3:40 pm - 10:18 pmSTL-SAT
6h 38m1 stop
Delta Logo
5:20 am - 12:04 pmSAT-STL
6h 44m1 stop
$229Delta
Find Deal
Wed, May 14 - Wed, May 21
Delta Logo
5:32 pm - 12:30 amSTL-SAT
6h 58m1 stop
Delta Logo
6:25 pm - 11:36 pmSAT-STL
5h 11m1 stop
$239Delta
Find Deal
Fri, May 2 - Sat, May 3
United Airlines Logo
6:15 am - 10:56 amSTL-SAT
4h 41m1 stop
United Airlines Logo
5:30 am - 10:01 amSAT-STL
4h 31m1 stop
$244United Airlines
Find Deal
Thu, Sep 4 - Sun, Sep 7
United Airlines Logo
3:40 pm - 11:18 pmSTL-SAT
7h 38m2 stops
United Airlines Logo
6:06 pm - 10:09 pmSAT-STL
4h 03m1 stop
$264United Airlines
Find Deal
Wed, Apr 23 - Fri, Apr 25
American Airlines Logo
5:35 am - 9:37 amSTL-SAT
4h 02m1 stop
American Airlines Logo
5:04 am - 10:19 amSAT-STL
5h 15m1 stop
$284American Airlines
Find Deal
Sun, Sep 28 - Fri, Oct 3
Southwest Logo
11:30 am - 1:45 pmSTL-SAT
2h 15mnonstop
Southwest Logo
5:00 am - 7:05 amSAT-STL
2h 05mnonstop
$323Southwest
Find Deal
Wed, Apr 23 - Fri, Apr 25
American Airlines Logo
5:31 am - 9:12 amSTL-SAT
3h 41m1 stop
American Airlines Logo
6:31 pm - 11:54 pmSAT-STL
5h 23m1 stop
$339American Airlines
Find Deal
Sun, Jun 15 - Thu, Jun 19
Southwest Logo
6:10 pm - 8:25 pmSTL-SAT
2h 15mnonstop
Southwest Logo
5:00 am - 7:05 amSAT-STL
2h 05mnonstop
$341Southwest
Find Deal
Fri, Apr 25 - Mon, Apr 28

Delta flights from St. Louis to San Antonio

Our best Delta deals on St. Louis to San Antonio flight tickets
Delta
May 14
STL3:40 pmLambert-St Louis
6h 38m
1 stop
SAT10:18 pmSan Antonio
May 21
SAT5:20 amSan Antonio
6h 44m
1 stop
STL12:04 pmLambert-St Louis
Delta
May 2
STL5:32 pmLambert-St Louis
6h 58m
1 stop
SAT12:30 amSan Antonio
May 3
SAT6:25 pmSan Antonio
5h 11m
1 stop
STL11:36 pmLambert-St Louis
Delta
May 30
STL7:06 pmLambert-St Louis
5h 22m
1 stop
SAT12:28 amSan Antonio
Jun 6
SAT6:06 pmSan Antonio
5h 20m
1 stop
STL11:26 pmLambert-St Louis

United Airlines flights from St. Louis to San Antonio

Our best United Airlines deals on St. Louis to San Antonio flight tickets
United Airlines
Sep 4
STL6:15 amLambert-St Louis
4h 41m
1 stop
SAT10:56 amSan Antonio
Sep 7
SAT5:30 amSan Antonio
4h 31m
1 stop
STL10:01 amLambert-St Louis
United Airlines
Apr 23
STL3:40 pmLambert-St Louis
7h 38m
2 stops
SAT11:18 pmSan Antonio
Apr 25
SAT6:06 pmSan Antonio
4h 03m
1 stop
STL10:09 pmLambert-St Louis
United Airlines
May 14
STL8:30 amLambert-St Louis
7h 16m
1 stop
SAT3:46 pmSan Antonio
May 21
SAT5:30 amSan Antonio
9h 17m
2 stops
STL2:47 pmLambert-St Louis

See travel insights to San Antonio from

How to get the cheapest flight ticket from St. Louis to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and San Antonio?

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of May, then book flights to San Antonio from St. Louis during August instead. Flights to San Antonio in August, while not as cheap as those in May, still average around $298.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Tuesday when prices can be found for as low as $333. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $487.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from St. Louis to San Antonio at noon for as low as $382. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the evening, with an average ticket price of $438. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to San Antonio flight route?

Fly from Lambert-St Louis to San Antonio for the best Lambert-St Louis - San Antonio flight prices

How far in advance should I book a flight to San Antonio?

You are more likely to see cheaper flights to San Antonio from St. Louis when booking 12 weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $339 when searching 12 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from St. Louis for as low as $250 on momondo.

What cabin class options are available on Lambert-St Louis to San Antonio flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to San Antonio flight prices changed over time?

As of April 2025, prices for St. Louis to San Antonio flights are approximately 18% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to San Antonio (STL to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to San Antonio

Best Price Found

$106

Fastest flight time

2h 05m

Direct flights

Mon, Tue, Wed, Thu, Sat and Sun

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from St. Louis in the past 72 hours is $106. The best round-trip flight deal from St. Louis to San Antonio found on momondo in the last 72 hours is $200.
The fastest flight from St. Louis to San Antonio takes 2h 05m
Direct flights go from St. Louis to San Antonio on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday. The only airline offering direct flights is Southwest.
There is 1 airport near San Antonio: San Antonio (SAT)

  • How far is Lambert-St Louis to San Antonio by plane?

    There are 792.4 mi between Lambert-St Louis and San Antonio. 2h 05m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to San Antonio Airport?

    Prices for flights from Lambert-St Louis Airport to San Antonio Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to San Antonio Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to San Antonio Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to San Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The travel and health documents you'll need for your trip to San Antonio Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Antonio Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to San Antonio?

  • What is the most popular airline from St. Louis to San Antonio?


Best airlines flying from St. Louis to San Antonio

Compare and see reviews for airlines that fly from St. Louis to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $128Free CancellationRating
5.9
3,276 reviews
Search Frontier flights
DeltaPriceFrom $167Free CancellationRating
8.0
7,897 reviews
Search Delta flights
SouthwestPriceFrom $197Free CancellationRating
8.0
4,274 reviews
Search Southwest flights
American AirlinesPriceFrom $207Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $218Free CancellationRating
7.4
8,619 reviews
Search United Airlines flights
  • Southwest Flights From St. Louis to San Antonio

    The lowest priced Southwest flight from St. Louis to San Antonio from the last 72 hours was $197. Generally, Southwest has 5 flights on this route every week with an average price of $400. Southwest is rated 8.0/10 by our users.


Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Schertz
Boerne
Pleasanton

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to San Antonio?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Antonio from St. Louis.

Can I find flights from St. Louis to San Antonio with flexible booking policies on momondo?

Flights from St. Louis to San Antonio with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to San Antonio?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Antonio from St. Louis.

I’m not ready to book a flight from St. Louis to San Antonio right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to San Antonio flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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