SAT - STL

$79 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 5/4. 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.
1 adult
1 adult, Economy, 0 bags

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$137
Typical prices: $464-$279
Frontier
Wed 5/27Wed 6/3
SAT - STL • 1 stop
Cheapest non-stop
$355
Typical prices: $412-$341
Southwest
Tue 5/5Tue 5/12
SAT - STL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Expect short security lines at San Antonio Airport.
Use MetroLink for easy access from Lambert-St Louis.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Southwest. Average duration is 2h 10m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $222 (round-trip)
Shortest trip • 3h 52m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 38% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Wed, May 27 - Wed, Jun 3
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
8:08 pm - 6:59 pm
STL
-
SAT
22h 51m
1 stop
$137Frontier
Tue, May 5 - Tue, May 12
Frontier Logo
8:59 pm - 6:06 pm
SAT
-
STL
21h 07m
1 stop
Frontier Logo
6:51 pm - 8:14 pm
STL
-
SAT
25h 23m
1 stop
$140Frontier
Tue, May 26 - Wed, Jun 3
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
8:08 pm - 6:59 pm
STL
-
SAT
22h 51m
1 stop
$142Frontier
Wed, May 27 - Tue, Jun 2
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
8:08 pm - 6:59 pm
STL
-
SAT
22h 51m
1 stop
$144Frontier
Tue, May 26 - Tue, Jun 2
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
8:08 pm - 6:59 pm
STL
-
SAT
22h 51m
1 stop
$149Frontier
Tue, May 5 - Tue, May 12
Frontier Logo
8:59 pm - 6:06 pm
SAT
-
STL
21h 07m
1 stop
Frontier Logo
6:51 pm - 8:14 pm
STL
-
SAT
25h 23m
1 stop
$151Frontier
Wed, May 20 - Tue, Jun 2
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
8:08 pm - 6:59 pm
STL
-
SAT
22h 51m
1 stop
$167Frontier
Fri, May 8 - Tue, May 12
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
6:51 pm - 8:14 pm
STL
-
SAT
25h 23m
1 stop
$171Frontier
Mon, May 25 - Wed, Jun 3
Frontier Logo
7:54 pm - 7:23 pm
SAT
-
STL
23h 29m
1 stop
Frontier Logo
8:08 pm - 6:59 pm
STL
-
SAT
22h 51m
1 stop
$175Frontier
Thu, Apr 30 - Mon, May 4
Frontier Logo
3:00 pm - 7:21 pm
SAT
-
STL
28h 21m
1 stop
Frontier Logo
9:55 pm - 8:14 pm
STL
-
SAT
22h 19m
1 stop
$182Frontier
Booking Insights

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.

How much is a round-trip flight from San Antonio to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Antonio to St. Louis departing in May.

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 Sunday. On your return trip to San Antonio, you should consider flying back on a Saturday, 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 August, where tickets cost $236 (return) on average. On the other hand, the most expensive months are November and March, where the average cost of round-trip tickets is $578 and $488 respectively.

Can I save money by flying with a layover from San Antonio to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $327, prices are generally cheapest when you fly direct.

Expert advice

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

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on SAT

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.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

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.

Good to know

Low seasonOctober
Cheapest flight$82
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 27% 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 $82 for a one-way ticket and $137 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, and JetBlue 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 MAX 8 is the aircraft model that flies most regularly on the San Antonio to St. Louis flight route.

  • Which airline alliances offer flights from San Antonio to St. Louis?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between San Antonio and St. Louis, with SkyTeam being the most commonly used for this 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 $439 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 $258 and an overall rating of 7.9.

  • 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 $149 or less one-way and $330 or less round-trip.

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

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Antonio to Lambert-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

Reviews of the 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 4334 reviews
7.5Entertainment
8.0Comfort
7.0Food
8.6Crew
8.1Boarding
Airline reviews

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

6.0 GoodKenley, Apr 2026
AUS - LAS
Read more Southwest reviews

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Communication about the delayed flight was poor. We were told to move gates three times but that was bad information. We went from gate 128 to gate 126 and then to gate 123 and back to gate 126. Communication about the delay was bad. Ended up being 1 1/2 hour late getting home.

Plane was late. Zero service for 2+ hour flight and it was not that bumpy.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

I elected to pay for the upgrades and found very little difference

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

Great plane, great attendants,great flight crew,on time. Wonderful flight home..

The flight was smooth, the crew was great but the plane was quite old

Everything was great until I lost my water bottle and they can’t seem to locate it. I know I left it on the plane though.

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Okay considering we had weather delays which the Pilot notified us of immediately!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

Flight from Fort Wayne to Atlanta was the smallest in terms of cabin space that I've ever seen. A carry on I've used for 20 years BARELY fit in overhead compartment. I'm 5'10" and felt very cramped. Not the best experience.

I am writing to express my dissatisfaction with the poor service and unprofessional staff we encountered when traveling with an infant. Our flight was delayed, and the gate staff failed to manage the boarding process appropriately. Due to incorrect, unavailable, or missing 'pink tag' stroller and car seat check-in procedures at the gate, we were forced to board last. Furthermore, the gate staff was rude and dismissive, causing significant distress to our infant. To make matters worse, one of our checked items—an infant sleeper/lounger—was returned to us broken. Given the unsafe handling of essential equipment and unprofessional treatment, I expect a prompt resolution regarding compensation for the damaged items.

We departed and landed early which was a nice surprise. The boarding process was slow.

N Everything was perfect from boarding to assistance to baggage in Tampa

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

Delayed, toilets did not flush, pilot parked to far away from Gate

Boarding was quick and efficient. We arrived at our destination early.

Seat was VERY uncomfortable. Flight was delayed and then boarded slowly. The crew was super helpful with boarding and supporting maximizing the luggage in the overhead.

The flight changed gates multiple times and flight had to be delayed multiple times

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Delayed for mechanical and no updates on what was happening and how long the delay might be.

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

Absolutely terrible. Would never fly American again. 2 deplaned incidents and delayed by close to 24 hours. $12 meal voucher for first class passengers was an insult to the injury. Pathetic.

Mostly good. The WiFi wasn’t working so that was not great.

I rated the experience "mediocre" because of the 2 hour delay in take off. This is the 4th flight from DFW on AA where there was a delay and in one of the instances (after 13 delays), the flight was cancelled. I understand weather but for the March 18th flight, there was no weather issue in Dallas or Detroit. I called Concierge Key and they were wonderful, booking me on a later flight in case my flight was cancelled. I have flown with American for many years and never has there been this consistent pattern of delays. Very disappointing.

As a first class customer, there was no power the entire flight which limited my ability to work. I find this unacceptable. The first 11 rows on the left side of the plan were out. I was only offered the option to charge my phone which was not the issue because my laptop was out of power. I asked if there was anything that can be done for me, and the answer was, "no". I was not offered any type of compensation for this AA problem which caused me unnecessary stress due to inability to address business issues on an already challenging travel day. Flight attendants tried to reset the power once but that was the extent of their support. Very disappointing for the lack of expected services on a flight. Please contact me with customer focused response to this complaint.

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

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

Information on your arrival and departure airports