$120+ Cheap flights from St. Louis to San Antonio (STL - SAT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Aug 24 — Aug 311
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to San Antonio with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to San Antonio are usually found in September or January, booked 90 days in advance, depart on a Saturday or Tuesday and return on a Thursday
Cheap flight deals from St. Louis to San Antonio
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to San AntonioExplore the most affordable flight options available from St. Louis to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.
Explore the most affordable flight options available from St. Louis to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.
This Expedia deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:34 pm
STL
- SAT
1 stop12h 28m
Frontier
Mon 9/2112:43 pm
SAT
- STL
1 stop23h 08m
Frontier
Deal found 7/21![Frontier logo]()
$240
This Frontier deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:10 pm
STL
- SAT
1 stop25h 27m
Frontier
Mon 8/179:51 am
SAT
- STL
1 stop14h 08m
Frontier
Deal found 7/21![Frontier logo]()
$241
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:34 pm
STL
- SAT
1 stop13h 05m
Frontier
Mon 10/1912:16 pm
SAT
- STL
1 stop6h 59m
Frontier
Deal found 7/25![Frontier logo]()
$244
This CheapOair deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:08 pm
STL
- SAT
1 stop22h 46m
Frontier
Wed 8/1910:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/22![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:02 pm
STL
- SAT
1 stop15h 54m
Frontier
Thu 8/2710:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/23![Frontier logo]()
$251
This CheapOair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2612:17 pm
STL
- SAT
1 stop23h 27m
Frontier
Wed 9/303:19 pm
SAT
- STL
1 stop19h 58m
Frontier
Deal found 7/25![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2512:17 pm
STL
- SAT
1 stop8h 46m
Frontier
Mon 9/2810:05 am
SAT
- STL
1 stop6h 29m
Frontier
Deal found 7/25![Frontier logo]()
$258
This CheapOair deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:19 pm
STL
- SAT
1 stop18h 29m
Frontier
Sat 10/1012:16 pm
SAT
- STL
1 stop6h 59m
Frontier
Deal found 7/22![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:08 pm
STL
- SAT
1 stop23h 23m
Frontier
Fri 8/2110:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/25![Frontier logo]()
$269
This CheapOair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/258:10 pm
STL
- SAT
1 stop23h 15m
Frontier
Wed 9/303:19 pm
SAT
- STL
1 stop19h 58m
Frontier
Deal found 7/25![Frontier logo]()
$273
Best flights from St. Louis to San AntonioDiscover carefully curated flight deals from St. Louis to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 25, 2026.
Discover carefully curated flight deals from St. Louis to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 25, 2026.
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:10 am
STL
- SAT
1 stop7h 20m
Southwest
Mon 9/217:20 am
SAT
- STL
Nonstop2h 05m
Southwest
Deal found 7/24![Southwest logo]()
$307
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:54 pm
STL
- SAT
1 stop5h 14m
Delta
Tue 9/295:30 am
SAT
- STL
1 stop7h 53m
Delta
Deal found 7/25![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/53:12 pm
STL
- SAT
1 stop4h 16m
United Airlines
Tue 10/611:47 am
SAT
- STL
2 stops9h 34m
United Airlines
Deal found 7/23![United Airlines logo]()
$402
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:45 pm
STL
- SAT
Nonstop2h 10m
Southwest
Mon 10/266:45 pm
SAT
- STL
1 stop5h 00m
Southwest
Deal found 7/23![Southwest logo]()
$307
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:45 pm
STL
- SAT
Nonstop2h 10m
Southwest
Fri 8/213:30 pm
SAT
- STL
Nonstop2h 10m
Southwest
Deal found 7/25![Southwest logo]()
$346
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:45 pm
STL
- SAT
1 stop5h 23m
Delta
Sun 9/275:30 am
SAT
- STL
1 stop5h 25m
Delta
Deal found 7/25![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:30 am
STL
- SAT
Nonstop2h 10m
Southwest
Fri 10/95:10 pm
SAT
- STL
1 stop6h 10m
Southwest
Deal found 7/21![Southwest logo]()
$389
This United Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:59 pm
STL
- SAT
2 stops9h 40m
United Airlines
Fri 9/412:55 pm
SAT
- STL
1 stop8h 22m
United Airlines
Deal found 7/24![United Airlines logo]()
$483
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/251:30 pm
STL
- SAT
1 stop6h 52m
Delta
Sat 11/285:30 am
SAT
- STL
1 stop7h 26m
Delta
Deal found 7/23![Delta logo]()
$449
Last-minute flights from St. Louis to San AntonioDiscover last-minute flight deals from St. Louis to San Antonio. Data last updated July 25, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to San Antonio. Data last updated July 25, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/68:08 pm
STL
- SAT
1 stop22h 46m
Frontier
Mon 8/109:51 am
SAT
- STL
1 stop14h 08m
Frontier
Deal found 7/21![Frontier logo]()
$320
This CheapOair deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/78:08 pm
STL
- SAT
1 stop22h 46m
Frontier
Tue 8/117:49 pm
SAT
- STL
1 stop23h 34m
Frontier
Deal found 7/21![Frontier logo]()
$305
This CheapOair deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:10 pm
STL
- SAT
1 stop25h 27m
Frontier
Mon 8/179:51 am
SAT
- STL
1 stop14h 08m
Frontier
Deal found 7/24![Frontier logo]()
$311
This Frontier deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:10 pm
STL
- SAT
1 stop25h 27m
Frontier
Mon 8/179:51 am
SAT
- STL
1 stop14h 08m
Frontier
Deal found 7/21![Frontier logo]()
$241
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:05 am
STL
- SAT
1 stop6h 20m
Southwest
Mon 8/177:20 am
SAT
- STL
Nonstop2h 05m
Southwest
Deal found 7/21![Southwest logo]()
$307
This CheapOair deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:08 pm
STL
- SAT
1 stop22h 46m
Frontier
Wed 8/1910:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/22![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:57 pm
STL
- SAT
2 stops16h 18m
Multiple Airlines
Wed 8/198:26 pm
SAT
- STL
1 stop22h 47m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$309
This CheapOair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:08 pm
STL
- SAT
1 stop23h 23m
Frontier
Fri 8/2110:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/25![Frontier logo]()
$269
This CheapOair deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:02 pm
STL
- SAT
1 stop15h 54m
Frontier
Thu 8/2710:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/23![Frontier logo]()
$251
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:45 pm
STL
- SAT
Nonstop2h 10m
Southwest
Thu 8/277:20 am
SAT
- STL
Nonstop2h 05m
Southwest
Deal found 7/21![Southwest logo]()
$297
This CheapOair deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:58 pm
STL
- SAT
1 stop23h 33m
Frontier
Sun 8/308:26 pm
SAT
- STL
1 stop22h 47m
Frontier
Deal found 7/24![Frontier logo]()
$315
This CheapOair deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:45 pm
STL
- SAT
1 stop26h 44m
Frontier
Fri 9/410:24 pm
SAT
- STL
1 stop19h 26m
Frontier
Deal found 7/22![Frontier logo]()
$291
One-way flights from St. Louis to San AntonioSearch for one-way flight options from St. Louis to San Antonio. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
Search for one-way flight options from St. Louis to San Antonio. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
This Priceline deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:46 pm
STL
- SAT
1 stop8h 53m
Frontier
Deal found 7/22![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:34 pm
STL
- SAT
1 stop13h 05m
Frontier
Deal found 7/22![Frontier logo]()
$126
This Trip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:08 pm
STL
- SAT
1 stop22h 46m
Frontier
Deal found 7/25![Frontier logo]()
$129
This Trip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:58 pm
STL
- SAT
1 stop23h 33m
Frontier
Deal found 7/24![Frontier logo]()
$130
This CheapOair deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:02 pm
STL
- SAT
1 stop15h 54m
Frontier
Deal found 7/22![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:17 pm
STL
- SAT
3 stops22h 41m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:58 pm
STL
- SAT
1 stop23h 33m
Frontier
Deal found 7/23![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:10 pm
STL
- SAT
1 stop15h 11m
Frontier
Deal found 7/22![Frontier logo]()
$142
Find flight deals from St. Louis to San Antonio
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Expedia) |
One-way from | $120 (Frontier) |
Popular in | August |
Cheapest in | September |
Average price | $477 |
Good round-trip deal | $515 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
Use the filters below to find and compare flights from St. Louis to San Antonio that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 9/17
10:10 am-5:30 pm
1 stop7h 20m
San Antonio
Mon 9/21
7:20 am-9:25 am
Nonstop2h 05m
$307
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 10/22
9:45 pm-11:55 pm
Nonstop2h 10m
San Antonio
Mon 10/26
6:45 pm-11:45 pm
1 stop5h 00m
$307
Quickest round-trip
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 8/17
8:45 pm-10:55 pm
Nonstop2h 10m
San Antonio
Fri 8/21
3:30 pm-5:40 pm
Nonstop2h 10m
$346
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 9/25
6:54 pm-12:08 am
1 stop5h 14m
San Antonio
Tue 9/29
5:30 am-1:23 pm
1 stop7h 53m
$356
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 10/7
8:30 am-10:40 am
Nonstop2h 10m
San Antonio
Fri 10/9
5:10 pm-11:20 pm
1 stop6h 10m
$389
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 9/23
6:45 pm-12:08 am
1 stop5h 23m
San Antonio
Sun 9/27
5:30 am-10:55 am
1 stop5h 25m
$399
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 10/5
3:12 pm-7:28 pm
1 stop4h 16m
San Antonio
Tue 10/6
11:47 am-9:21 pm
2 stops9h 34m
$402
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 11/25
1:30 pm-8:22 pm
1 stop6h 52m
San Antonio
Sat 11/28
5:30 am-12:56 pm
1 stop7h 26m
$449
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 8/31
12:59 pm-10:39 pm
2 stops9h 40m
San Antonio
Fri 9/4
12:55 pm-9:17 pm
1 stop8h 22m
$483
Cheapest one-way
Quickest one-way
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 1/20
8:25 am-10:50 am
Nonstop2h 25m
$149
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from St. Louis to San Antonio
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to San Antonio in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-San Antonio flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-San Antonio flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to San Antonio
Have a flexible travel schedule? Discover the best time to fly to San Antonio from St. Louis with our price prediction graph.
STL-SAT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to San Antonio
How far ahead should I book a flight from St. Louis to San Antonio?
Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to San Antonio. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from St. Louis to San Antonio?
Currently, September is the cheapest month in which you can book a flight from St. Louis to San Antonio (average of $297). Flying from St. Louis to San Antonio in August is currently the most expensive (average of $538). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to SAT?
Find hourly flight availability from St. Louis to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 25, 2026.
When flying from St. Louis to San Antonio, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 38% versus a flight at noon.
Reviews of airlines servicing San Antonio
Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated July 25, 2026.
Read through reviews of airlines operating flights from St. Louis to San Antonio, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from St. Louis to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
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St. Louis and San Antonio flights
Browse other St. Louis and San Antonio flight options. Last updated on July 25, 2026.
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Top 5 airlines flying from St. Louis to San Antonio
Discover the top 5 airlines that operate flights from St. Louis to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$186 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$111 | Average$270 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$199 | Average$340 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$242 | Average$350 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$268 | Average$432 | FlexibilityNo cancel fee | On-time63% |