£355 Cheap Flights from San Antonio (SAT) to St. Louis (STL)

View £355 flight on Wed, 13 Aug 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at £355 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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

September is typically the cheapest month to fly

From £96 - £418 per traveller.

Graph displaying average flight prices per month

Flight from San Antonio to St. Louis route information
Origin airport
San Antonio Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
1258 km
Average flight time
2 hours 12 mins

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

For travelling on business or for pleasure, Expedia makes it easy to book your flights from San Antonio to St. Louis. Operating between them 1 flights per day, 14 airlines cover the route. And Southwest Airlines fly direct, getting you to Lambert-St. Louis Intl. in just 2hours. If you have a preferred carrier, use our advanced search tool to find the right flight from San Antonio Intl. to Lambert-St. Louis 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 San Antonio Intl. (SAT) to Lambert-St. Louis Intl. (STL)

The easiest way to view the best deals on flights from San Antonio to St. Louis 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 San Antonio Intl. to Lambert-St. Louis Intl. start at just and range up to .  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from San Antonio Intl. to Lambert-St. Louis 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 San Antonio Airport to St. Louis Lambert International Airport?
Based on fares available within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from San Antonio Intl. Airport (SAT) to Lambert Field start from . Book today to get the best price for your trip. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SAT to St. Louis Lambert International Airport?
We understand that things come up unexpectedly, so we've made it as simple as possible for you to cancel your trip online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from San Antonio Intl. Airport (SAT) to Lambert Field 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 SAT to Lambert-St. Louis Intl. Airport (STL) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from San Antonio Intl. Airport (SAT) to St. Louis Lambert International Airport?
There are plenty of ways to make the 4 hours and 52 minutes between San Antonio Airport and Lambert-St. Louis Intl. Airport (STL) go by faster. Be productive and sort through your camera roll or delete all those backed-up emails. A snooze also helps pass the time!
How far is the flight from SAT to Lambert Field?
It's just 1,250 kilometres between San Antonio and St. Louis. It's quite possible that you'll spend more time getting to and from the airport than you will actually flying!
Which airlines fly direct from San Antonio Intl. Airport (SAT) to Lambert-St. Louis Intl. Airport (STL)?
A popular option with many savvy travellers, Southwest Airlines (WN) operates 30 monthly flights from San Antonio Intl. Airport (SAT) to St. Louis Lambert International Airport. Pick the one that fits with your travel plans and book your seat today.
Are San Antonio Airport to STL flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from SAT to St. Louis Lambert International Airport can be hit-or-miss. It is possible to score a bargain, but you could also miss out completely! If you'd prefer to play it safe and start planning your trip early on, Expedia compares flight deals up to a year in advance. Just remember that not all airlines issue their prices that far in advance. Our suggestion? Check back often as updates are made regularly.

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