£165 Cheap Flights from St. Louis (STL) to San Antonio (SAT)

View £165 flight on Tue, 11 Nov 2025Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to San Antonio International Airport (SAT)

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Cheap Flights from St. Louis (STL) to San Antonio (SAT)

Prices were available within the past 7 days and start at £165 for one-way flights and £543 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sun, 24 Aug - Thu, 28 Aug
STL
St. Louis
SAT
San Antonio
£543 Return, found 6 days ago
£543
Return
found 6 days ago
Select Alaska Airlines flight, departing Sun, 24 Aug from St. Louis to San Antonio, returning Thu, 28 Aug, priced at £543 found 6 days ago
Alaska Airlines
Sun, 24 Aug - Thu, 28 Aug
STL
St. Louis
SAT
San Antonio
£692 Return, found 6 days ago
£692
Return
found 6 days ago
Select Alaska Airlines flight, departing Sun, 24 Aug from St. Louis to San Antonio, returning Thu, 28 Aug, priced at £692 found 6 days ago
Alaska Airlines
Sun, 24 Aug - Thu, 28 Aug
STL
St. Louis
SAT
San Antonio
£871 Return, found 6 days ago
£871
Return
found 6 days ago
Select Alaska Airlines flight, departing Sun, 24 Aug from St. Louis to San Antonio, returning Thu, 28 Aug, priced at £871 found 6 days ago

Find the cheapest month to fly from St. Louis (STL) to San Antonio (SAT)

September is typically the cheapest month to fly

From £96 - £315 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to San Antonio route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
San Antonio Intl.
Return price
£542
Distance
1258 km
Average flight time
2 hours 6 mins

Compare flights from St. Louis to San Antonio easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to San Antonio. Operating between them 2 flights per day, 20 airlines cover the route. And Southwest Airlines fly direct, getting you to San Antonio Intl. in just 2hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to San Antonio Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to San Antonio Intl. (SAT)

The easiest way to view the best deals on flights from St. Louis to San Antonio today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to San Antonio Intl. start at just £543 and range up to £871.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near St. Louis and San Antonio
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your St. Louis to San Antonio flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to San Antonio Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from STL to San Antonio Airport?
Round-trip journeys from STL to SAT start from £543. This price is based on fares quoted within the last 7 days on Expedia for flights departing within the next year — book now to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to San Antonio Intl. Airport (SAT)?
The majority of flights can be cancelled online, but whether you incur a fee varies between airlines. If you do need to cancel your break, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from St. Louis Lambert International Airport to SAT that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert Field to San Antonio Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert-St. Louis Intl. Airport (STL) to San Antonio Airport?
A flight distance of just 1,250 kilometres separates St. Louis and San Antonio. Once you're up in the skies, you won't get a chance to do much more than read the magazine in your seat pocket.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to San Antonio Intl. Airport (SAT)?
Southwest Airlines (WN) will take you from STL to SAT safely and reliably. You can choose from 30 flights every month along this route.
Are STL to San Antonio Airport flight tickets cheaper when they're purchased at the last minute?
It is possible to find a great last-minute deal from St. Louis Lambert International Airport to SAT, but it's also possible to miss out entirely! As many airlines release seats up to a year in advance, it's worthwhile keeping an eye on fares early and being ready to book when you spot a bargain. Expedia compares carrier prices and updates flight deals all the time, so you can be sure you're always seeing the latest offers.

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