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$85 Find cheap flights from St. Louis to San Antonio

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to San Antonio departing on 5/14. 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
0 bags
Mon 6/3
Mon 6/10

Search hundreds of travel sites at once for deals on flights to San Antonio

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Antonio, 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 St. Louis to San Antonio, as well as popular online travel agencies
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to San Antonio (STL-SAT)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Antonio 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 and deals for you by selecting your travel dates.
Choose your dates
5:15 pm - 12:21 amSTL-SAT
7h 06m1 stop
8:41 pm - 10:46 amSAT-STL
14h 05m1 stop
$144Spirit Airlines
Find Deal
Sat, May 18 - Tue, May 21
7:29 pm - 5:44 pmSTL-SAT
22h 15m1 stop
6:40 pm - 10:18 amSAT-STL
15h 38m1 stop
$164Frontier
Find Deal
Mon, Aug 19 - Fri, Aug 23
5:15 pm - 12:21 amSTL-SAT
7h 06m1 stop
10:31 am - 2:37 pmSAT-STL
28h 06m1 stop
Sat, Jun 1 - Sat, Jun 8
3:32 pm - 8:27 amSTL-SAT
16h 55m1 stop
10:58 pm - 9:29 amSAT-STL
10h 31m1 stop
$196Frontier
Find Deal
Thu, Jun 6 - Sun, Jun 9
7:29 pm - 3:16 pmSTL-SAT
19h 47m1 stop
8:28 pm - 10:57 amSAT-STL
14h 29m1 stop
Thu, Jun 6 - Mon, Jun 10
11:36 am - 9:15 pmSTL-SAT
9h 39m1 stop
11:26 am - 6:40 pmSAT-STL
7h 14m1 stop
$217Spirit Airlines
Find Deal
Wed, May 15 - Thu, May 16
5:01 pm - 9:30 pmSTL-SAT
4h 29m1 stop
5:15 am - 12:22 pmSAT-STL
7h 07m2 stops
$461United Airlines
Find Deal
Mon, Aug 19 - Fri, Aug 23
6:15 am - 11:03 amSTL-SAT
4h 48m1 stop
5:30 am - 3:41 pmSAT-STL
10h 11m2 stops
$499United Airlines
Find Deal
Sat, Jun 22 - Wed, Jun 26
6:30 pm - 12:27 amSTL-SAT
5h 57m1 stop
6:08 am - 11:10 amSAT-STL
5h 02m1 stop
$581Delta
Find Deal
Tue, May 14 - Thu, May 30
9:20 am - 4:49 pmSTL-SAT
7h 29m1 stop
7:27 am - 5:19 pmSAT-STL
9h 52m2 stops
$600American Airlines
Find Deal
Fri, Jul 19 - Sun, Jul 21

Flights from St. Louis to San Antonio - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to San Antonio 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 St. Louis to San Antonio?

The average price of all flights from St. Louis to San Antonio clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to San Antonio on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from St. Louis to San Antonio. For your return ticket, we recommend flying on a Tuesday and avoiding Wednesdays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to San Antonio, 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 St. Louis to San Antonio is January, where tickets cost $277 on average. On the other hand, the most expensive months are March and July, where the average cost of tickets is $457 and $399 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to San Antonio, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to San Antonio, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 47 days before departure.

Which airlines provide the cheapest flights from St. Louis to San Antonio?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from St. Louis to San Antonio found on KAYAK was with Frontier for $85. Spirit Airlines proposed a round-trip connection from $144 and Frontier from $164.

How many flights are there between St. Louis and San Antonio per day?

Each day, there are between 1 and 4 nonstop flights that take off from St. Louis and land in San Antonio, with an average flight time of 2h 14m. The most common departure time is 10:00 am and most flights take off in the morning. Each week, there are 17 flights. The most frequent day of departure is Wednesday, when 24% of all weekly flights depart. The fewest flights depart on a Saturday.

What’s the earliest departure time from St. Louis to San Antonio?

Early birds can take the earliest flight from St. Louis at 9:55 am and will be landing in San Antonio at 12:00 pm.

What’s the latest departure time from St. Louis to San Antonio?

If you prefer to fly at night, the latest flight from St. Louis to San Antonio jets off at 10:45 pm and lands at 12:50 am.

Good to know

Low season

May

High season

December

Cheapest flight

$85
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from St. Louis to San Antonio

When to book flights from St. Louis to San Antonio

Are your dates flexible? Find out the best times to travel from St. Louis to San Antonio 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 St. Louis to San Antonio

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

    In the last 3 days, the lowest price for a flight from St. Louis to San Antonio was $85 for a one-way ticket and $144 for a round-trip.

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

    A passport is not required to fly from St. Louis to San Antonio.

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

    We unfortunately don’t have that data for this specific route.

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to San Antonio are Delta and American Airlines. With an average price for the route of $303 and an overall rating of 8.0, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $406 and an overall rating of 7.3.

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

    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 St. Louis to San Antonio.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from St. Louis 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 St. Louis to San Antonio?

    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 San Antonio with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SAT 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 St. Louis to San Antonio?

    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 San Antonio from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from St. Louis to San Antonio?

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

Nonstop departures

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

Nonstop returns

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
See more direct flights

Top 5 airlines serving from St. Louis to San Antonio

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Antonio. 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 St. Louis to San Antonio? 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
DeltaOverall score based on 10838 reviews
7.4Food
7.9Comfort
8.0Entertainment
8.2Boarding
8.6Crew
Airline reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

10.0 ExcellentAllan, May 2024SUN - SLC
Read more about Delta reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

Crew were fine, drinks and snacks were as well but we were delayed for around 2 hrs which made our entry into Mexico delayed as well with the influx of arrivals at the same time. Sort of wasted our first day of vacation. We left Pittsburgh at 630am and did not arrive in Mexico until late dinner time.

Boarding was unorganized. They expected passengers to ask people to move their assigned seat they paid for in order to sit together. The seats even in comfort are smaller than other airlines and the flight attendants appeared not to be well prepared

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Trip was smooth bumpy from the wind but no issues at all the crew attendant was very pleasant and had great customer service

The customer service was excellent! Check-in, baggage check-in, boarding, the flight went very smooth.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

It was delayed several hours which delayed our connection in Denver. Not happy.

Ok, but comfort was lacking as the seats were way to small

All good except paid for wifi that did not work

Some of these FA’s need attitude check. Snarky bitches

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

this is starting to seem like an american airlines standard. delayed flights and fake apologies… getting tired of it

Flight boarded without pilots. Sat on plane for 3 hrs. after over an hour late boarding. Plane never took off. Had to deplane near midnight. Line for rebooking was 3 hours + long. I had to leave.

Missed the flight because of them and up geting a rental car

Delayd flight out of atl as always miss my conection in dfw no flight untill next day

No problems with flight. Even though I had a short layover in DFW, I was still able to easily make my connection.

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

Good flights. Departure and arrivals were on time. DFW was a little problematic in that the Skytrain without prior notice bypassed the Echo terminal so that delayed my arrival at my connecting flight.

Late boarding to clean plane from previous flight; initial boarding announcement not loud enough; fantastic cabin attendant front of plane

Delayed flight, few announcements with information, no comps, cluster f boarding because zones weren’t spread out and announced loud and repeatedly, staff did their job -nothing more nothing less, annoying kids were speaking and kicking the heck out of the back of my seat and parents weren’t willing to parent… so another typical day of air travel in the US.,

Seats suck, not enough room, overcrowded planes, hectic situation all together.

On time and fast. Overall it was a pleasant experience.

3 hour delay was brutal though not Spirit Airlines fault. the control tower would not let us take off because of weather

Beware of all the extras. Nickel and dimed. Everything was extra. It turns a $90 fare in to a $400 fair quite easily.

It would have been nice to have been on the flight

Delayed several times. Flight was to arrive at midnight and it arrive at 3 am. A 3 hour delay is already bad but one that has you arriving in the wee hour is just disruptive and overall unacceptable. The complete lack of restitution is a joke in keeping with Spirit’s reputation of ranking bottom-low in the pecking order.

It wasn’t as horrible as I would have expected, however, to not provide water and change so much for bags is a ripoff to say the least.

Cancelled my flight , currently stuck in Houston and will likely miss my cruise

The flight attendants were very personable, extremely friendly, and had a very good feeling of the energy around them not to mention they’re very funny and engaging. What made up for the discomfort of the seats and the fact that the plane sat for a long time on the Turmac. Not sure if the pilot was new, but the landing was very rough sort of like I was at a magic mountain theme park ride that was built in 1959

Unfortunately not great, my flight was canceled with no notice given. I attempted to reach out to spirit airlines and have yet to receive any correspondence. I then had to book a new flight at two times the cost of the original.

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Book cheap flights from St. Louis to San Antonio

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to San Antonio found on KAYAK in the last 72 hours.
5/14Tue
1 stopFrontier
22h 05mSTL-SAT
$85
5/31Fri
1 stopFrontier
11h 38mSTL-SAT
$114
5/27Mon
1 stopSpirit Airlines
8h 36mSTL-SAT
$121
5/31Fri
3 stopsSpirit Airlines
28h 10mSTL-SAT
$131
6/6Thu
1 stopDelta
5h 46mSTL-SAT
$198
5/14Tue
3 stops
32h 11mSTL-SAT
$223
5/8Wed
1 stopSpirit Airlines
12h 07mSTL-SAT
$236
6/6Thu
2 stopsAmerican Airlines
11h 15mSTL-SAT
$283
5/8Wed
2 stopsUnited Airlines
12h 43mSTL-SAT
$304
5/27Mon
2 stopsUnited Airlines
14h 57mSTL-SAT
$307

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Last minute flights from St. Louis to San Antonio

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to San Antonio that are departing in the next 10 days.
5/8Wed
multi-stop
9h 39mSTL-SAT
5/15Wed
multi-stop
16h 50mSAT-STL
$344
5/8Wed
multi-stop
9h 39mSTL-SAT
5/15Wed
multi-stop
21h 36mSAT-STL
$466
5/8Wed
multi-stopSpirit Airlines
9h 39mSTL-SAT
5/15Wed
multi-stopSpirit Airlines
21h 41mSAT-STL
$546
5/8Wed
multi-stop
27h 56mSTL-SAT
5/15Wed
multi-stop
21h 36mSAT-STL
$573
5/7Tue
multi-stopAmerican Airlines
6h 19mSTL-SAT
5/8Wed
multi-stopAmerican Airlines
5h 27mSAT-STL
$595

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St. Louis - San Antonio Flights

Departure:

St. Louis (STL)United States

Destination:

San Antonio (SAT)United States

Return flight deals:

San Antonio - St. Louis

Cabin classes: