SAT - STL

$96 Find Cheap Flights from San Antonio to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to St. Louis departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to St. Louis, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from San Antonio to St. Louis (SAT-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from San Antonio to St. Louis

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Antonio to St. Louis.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
6:25 pm - 9:09 amSAT-STL
14h 44m1 stop
Frontier Logo
7:55 pm - 6:36 pmSTL-SAT
22h 41m1 stop
$198Frontier
Find Deal
Thu, May 15 - Sat, May 24
Frontier Logo
7:36 pm - 9:09 amSAT-STL
13h 33m1 stop
Frontier Logo
2:25 pm - 1:23 pmSTL-SAT
22h 58m1 stop
$228Frontier
Find Deal
Thu, May 29 - Fri, May 30
Delta Logo
6:06 pm - 11:26 pmSAT-STL
5h 20m1 stop
Delta Logo
11:32 am - 5:20 pmSTL-SAT
5h 48m1 stop
$229Delta
Find Deal
Tue, May 27 - Tue, Jun 3
United Airlines Logo
5:59 pm - 10:15 pmSAT-STL
4h 16m1 stop
United Airlines Logo
5:00 am - 1:04 pmSTL-SAT
8h 04m2 stops
$234United Airlines
Find Deal
Wed, May 28 - Wed, Jun 4
American Airlines Logo
6:34 pm - 11:51 pmSAT-STL
5h 17m1 stop
American Airlines Logo
6:00 am - 1:17 pmSTL-SAT
7h 17m1 stop
$239American Airlines
Find Deal
Mon, May 26 - Wed, May 28
United Airlines Logo
5:59 pm - 10:17 pmSAT-STL
4h 18m1 stop
United Airlines Logo
5:00 am - 1:04 pmSTL-SAT
8h 04m2 stops
$244United Airlines
Find Deal
Fri, May 30 - Wed, Jun 4
Delta Logo
6:09 pm - 11:38 pmSAT-STL
5h 29m1 stop
Delta Logo
5:30 pm - 10:23 pmSTL-SAT
4h 53m1 stop
$249Delta
Find Deal
Fri, Jun 6 - Mon, Jun 9
Southwest Logo
2:25 pm - 4:35 pmSAT-STL
2h 10mnonstop
Southwest Logo
5:05 pm - 7:20 pmSTL-SAT
2h 15mnonstop
$287Southwest
Find Deal
Tue, May 27 - Tue, Jun 3
Southwest Logo
6:45 am - 8:55 amSAT-STL
2h 10mnonstop
Southwest Logo
5:20 am - 10:10 amSTL-SAT
4h 50m1 stop
$289Southwest
Find Deal
Tue, May 27 - Tue, Jun 3
American Airlines Logo
4:32 pm - 11:51 pmSAT-STL
7h 19m2 stops
American Airlines Logo
10:31 am - 8:49 pmSTL-SAT
10h 18m2 stops
$599American Airlines
Find Deal
Mon, May 12 - Wed, May 14
Expert advice

Expert advice for your flight from San Antonio to St. Louis

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-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.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
SAT

Security lines at SAT are exceptionally short, often under 5 minutes, making it easy to navigate for early flights.

Read more about SATby Brandon Schultz
STL

Use MetroLink for easy access from STL to downtown St. Louis, avoiding rush hour traffic and offering convenient stops.

Read more about STLby Yulia Denisyuk
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on SAT

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Useful Info

KAYAK's insights & trends for San Antonio to St. Louis flights

Get data-powered insights and trends into flights from San Antonio to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Antonio to St. Louis?

The average price of all round-trip flights from San Antonio to St. Louis clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to St. Louis on a Wednesday and more expensive on a Monday. On your return trip to San Antonio, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

What is the cheapest month to fly from San Antonio to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Antonio to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Antonio to St. Louis is February, where tickets cost $298 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $397 and $382 respectively.

How far in advance should I book a flight from San Antonio to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Antonio to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Antonio to St. Louis, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonJanuary
High seasonNovember
Cheapest flight$96
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from San Antonio to St. Louis

When to book flights from San Antonio to St. Louis

Are your dates flexible? Find out the best times to travel from San Antonio to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Antonio to St. Louis

  • What is the cheapest flight from San Antonio to St. Louis?

    In the last 3 days, the lowest price for a flight from San Antonio to St. Louis was $96 for a one-way ticket and $198 for a round-trip.

  • Do I need a passport to fly between San Antonio and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from San Antonio to St. Louis?

    San Antonio airport is called San Antonio and the only airport in St. Louis is Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from San Antonio to St. Louis?

    American Airlines, Delta, JetBlue, and Alaska Airlines offer inflight Wi-Fi service on the San Antonio to St. Louis flight route.

  • Which aircraft models fly most regularly from San Antonio to St. Louis?

    The Boeing 737-700 Passenger/BBJ1 (winglets) is the aircraft model that flies most regularly on the San Antonio to St. Louis flight route.

  • On which days can I fly direct from San Antonio to St. Louis?

    There are nonstop flights from San Antonio to St. Louis on a daily basis.

  • Which is the best airline for flights from San Antonio to St. Louis, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from San Antonio to St. Louis are Southwest and Delta. With an average price for the route of $395 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $254 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from San Antonio to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Antonio to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from San Antonio is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Antonio to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to San Antonio with another airline. Booking your flights between San Antonio and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Antonio to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Antonio to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $179 or less one-way and $359 or less round-trip.

Prefer to fly direct from San Antonio to St. Louis?

Find which airlines fly direct from San Antonio Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

San Antonio to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Lambert-St Louis to San Antonio

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from San Antonio to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from San Antonio to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Antonio to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4294 reviews
7.6Entertainment
8.2Boarding
7.1Food
8.0Comfort
8.6Crew
Airline reviews

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

8.0 ExcellentJonathan, Apr 2025AUS - MSY
Read more Southwest reviews

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

Plz don't take away free bags and free seating

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

It was 2 hours 45 minutes late, for no apparently clear reason.

Crew was great flight was great baggage claim was a failure. It took over 1 hour for bags to arrive. Poor communication poor effort when I spoke to the supervisor about the delay

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Everything was great except the food. The pretzels are really crappy.

The last 30 min or so, they put the heat on full. We thought we were being basted.

Excellent. The lady boarding the flight was awesome. Very efficient, and she got everyone on line.

I had a front row middle. I am not a big person and I barely fit in between that seat! No place to put my arms, even though the guys on each side were not taking over the arm rests. It felt like a frontier flight (if that tells you everything )

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

My priority checked bag was not loaded on the flight. I had to sit in baggage claim in Las Vegas for 2 1/2 hours waiting for the next flight. All baggage staff were very helpful, tracking showed it as scanned for loading. Nobody told me why it wasn't on my flight.

Food choices were very limited. Taste of the dishes was average.

It’s been awhile since I have traveled on United. I, along with my family who were on the flight noted how smoothly everything went . Boarding, flight crew and service was excellent.

Oh my gosh, I loved my experience with United! they made me want to travel more often.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

How badly can you screw up baggage claim? We were told to go to baggage claim too for our bags from this flight. Another flights bags were there. They finished up. More bags from a different flight arrived. Our bags did not Finally the baggage claim belt stopped working and and are flight was still listed on the arrivals for that baggage claim 2. And then nothing It turns out that they had been delivered not only the United baggage claim but far away on a Delta baggage claim No I never told us. It was only the people looking around who had been on the flight But I’m sure there was plenty of time for the employees to raffle through the bags and steal whatever they wanted

Sucks ! All three flights I was on this trip were delayed.

Long wait before take off without an update for 20 minutes. Flight was good otherwise.

Took off on time and successfully avoided weather that looked to be a problem along the way

I liked everything. Except that my neck was hurting on the seat. I couldn't sleep.

We were delayed Al ost / hours after boarding so that maintenance had to add oil to the engines. Then the oil they grabbed had been left out in the Dallas record cold and was frozen. They had to go back to the hanger and grab some that was not frozen.

They changed my seat from one that I had paid for as an upgrade to a regular seat at the last minute.

Flight was empty so had a whole row to myself. Still had to wait to get the bag due to the negligence at Palm Springs departure.

Everything was on time, we arrived early, everything worked well.

Angela was the best fa ever. She made that 8 hour flight a breeze

This was a pleasant, short flight and the crew was friendly.

The service and food needs to improve to catch up with other international flights

Small plane, so no entertainment. Hour delay! Nobody explained wht the delay was all about.

The reps working at the airport counter were dumber than a second coat of paint.

My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

Cancelled and declined to find alternatives Earlier flight is 2 days later Sent the cancellation notification very late, wish I knew earlier would have stayed to watch the Miami open final game Very disappointing service

The worst flight of my life. Never will I fly frontier again

Everything you need to know for your flight from San Antonio to St. Louis

Information on your arrival and departure airports

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