$86+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Apr 12 — Apr 191
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 May or September, booked 90 days in advance, depart on a Saturday or Tuesday and return on a Monday
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 March 13, 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 March 13, 2026.
This Expedia deal was found by Cheapflights users on 3/8. 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 5/79:55 pm
STL
- SAT
1 stop13h 45m
Frontier
Sun 5/103:14 pm
SAT
- STL
1 stop27h 58m
Frontier
Deal found 3/8![Frontier logo]()
$160
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Wed 4/88:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Fri 4/106:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/8![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/38:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Tue 4/77:45 am
SAT
- STL
1 stop26h 03m
Frontier
Deal found 3/12![Frontier logo]()
$172
This Gotogate deal was found by Cheapflights users on 3/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Wed 4/154:49 pm
SAT
- STL
1 stop26h 32m
Frontier
Deal found 3/12![Frontier logo]()
$189
This CheapOair deal was found by Cheapflights users on 3/9. 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 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Fri 4/173:00 pm
SAT
- STL
1 stop28h 32m
Frontier
Deal found 3/9![Frontier logo]()
$191
This CheapOair deal was found by Cheapflights users on 3/9. 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 5/154:55 pm
STL
- SAT
1 stop25h 04m
Frontier
Mon 5/1810:23 am
SAT
- STL
1 stop12h 56m
Frontier
Deal found 3/9![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 3/9. 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 4/210:12 pm
STL
- SAT
1 stop12h 31m
Frontier
Thu 4/96:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/9![Frontier logo]()
$200
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Sun 4/510:12 pm
STL
- SAT
1 stop12h 31m
Frontier
Sun 4/126:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/8![Frontier logo]()
$206
This CheapOair deal was found by Cheapflights users on 3/10. 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 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Sun 4/126:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/10![Frontier logo]()
$212
This CheapOair deal was found by Cheapflights users on 3/8. 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 5/228:08 pm
STL
- SAT
1 stop22h 23m
Frontier
Tue 5/267:26 pm
SAT
- STL
1 stop23h 47m
Frontier
Deal found 3/8![Frontier logo]()
$221
This Frontier deal was found by Cheapflights users on 3/12. 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 3/278:12 pm
STL
- SAT
1 stop12h 54m
Frontier
Tue 3/312:13 pm
SAT
- STL
1 stop9h 06m
Frontier
Deal found 3/12![Frontier logo]()
$225
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 March 13, 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 March 13, 2026.
This Delta deal was found by Cheapflights users on 3/7. 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.
Tue 7/147:20 am
STL
- SAT
1 stop6h 26m
Delta
Tue 7/216:45 am
SAT
- STL
1 stop6h 09m
Delta
Deal found 3/7![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Thu 6/189:23 am
STL
- SAT
1 stop6h 40m
United Airlines
Mon 6/296:40 am
SAT
- STL
1 stop5h 31m
United Airlines
Deal found 3/8![United Airlines logo]()
$275
This Southwest deal was found by Cheapflights users on 3/11. 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.
Sun 4/195:35 am
STL
- SAT
1 stop6h 30m
Southwest
Wed 4/226:30 am
SAT
- STL
2 stops6h 20m
Southwest
Deal found 3/11![Southwest logo]()
$310
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 4/86:00 am
STL
- SAT
1 stop4h 50m
United Airlines
Thu 4/94:17 pm
SAT
- STL
1 stop6h 11m
United Airlines
Deal found 3/10![United Airlines logo]()
$290
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 4/196:50 pm
STL
- SAT
1 stop5h 56m
Delta
Wed 4/226:20 am
SAT
- STL
1 stop5h 36m
Delta
Deal found 3/11![Delta logo]()
$291
This Southwest deal was found by Cheapflights users on 3/10. 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 5/215:40 am
STL
- SAT
1 stop5h 45m
Southwest
Tue 5/263:50 pm
SAT
- STL
Nonstop2h 10m
Southwest
Deal found 3/10![Southwest logo]()
$315
This Southwest deal was found by Cheapflights users on 3/8. 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.
Fri 5/225:40 am
STL
- SAT
1 stop5h 45m
Southwest
Tue 5/267:25 am
SAT
- STL
Nonstop2h 10m
Southwest
Deal found 3/8![Southwest logo]()
$339
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Tue 7/148:35 am
STL
- SAT
1 stop7h 04m
United Airlines
Tue 7/215:30 am
SAT
- STL
2 stops10h 16m
United Airlines
Deal found 3/7![United Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 3/8. 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 3/305:45 am
STL
- SAT
1 stop4h 55m
Southwest
Wed 4/15:45 am
SAT
- STL
2 stops6h 25m
Southwest
Deal found 3/8![Southwest logo]()
$345
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Tue 4/79:10 am
STL
- SAT
2 stops10h 38m
United Airlines
Sat 4/116:02 pm
SAT
- STL
1 stop4h 26m
United Airlines
Deal found 3/8![United Airlines logo]()
$350
Last-minute flights from St. Louis to San AntonioDiscover last-minute flight deals from St. Louis to San Antonio. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to San Antonio. Data last updated March 13, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Wed 3/188:12 pm
STL
- SAT
1 stop28h 05m
Frontier
Sun 3/226:45 am
SAT
- STL
1 stop27h 04m
Frontier
Deal found 3/8![Frontier logo]()
$237
This Frontier deal was found by Cheapflights users on 3/12. 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 3/278:12 pm
STL
- SAT
1 stop12h 54m
Frontier
Tue 3/312:13 pm
SAT
- STL
1 stop9h 06m
Frontier
Deal found 3/12![Frontier logo]()
$225
This Frontier deal was found by Cheapflights users on 3/9. 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 3/278:12 pm
STL
- SAT
1 stop12h 54m
Frontier
Mon 3/302:13 pm
SAT
- STL
1 stop9h 06m
Frontier
Deal found 3/9![Frontier logo]()
$234
This CheapOair deal was found by Cheapflights users on 3/9. 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 4/210:12 pm
STL
- SAT
1 stop12h 31m
Frontier
Thu 4/96:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/9![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/38:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Tue 4/77:45 am
SAT
- STL
1 stop26h 03m
Frontier
Deal found 3/12![Frontier logo]()
$172
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Sun 4/510:12 pm
STL
- SAT
1 stop12h 31m
Frontier
Sun 4/126:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/8![Frontier logo]()
$206
This CheapOair deal was found by Cheapflights users on 3/8. 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.
Wed 4/88:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Fri 4/106:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/8![Frontier logo]()
$171
This Gotogate deal was found by Cheapflights users on 3/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Wed 4/154:49 pm
SAT
- STL
1 stop26h 32m
Frontier
Deal found 3/12![Frontier logo]()
$189
This CheapOair deal was found by Cheapflights users on 3/9. 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 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Fri 4/173:00 pm
SAT
- STL
1 stop28h 32m
Frontier
Deal found 3/9![Frontier logo]()
$191
This CheapOair deal was found by Cheapflights users on 3/10. 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 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Sun 4/126:45 am
SAT
- STL
1 stop27h 03m
Frontier
Deal found 3/10![Frontier logo]()
$212
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 March 13, 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 March 13, 2026.
This Frontier deal was found by Cheapflights users on 3/9. 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 5/79:55 pm
STL
- SAT
1 stop13h 45m
Frontier
Deal found 3/9![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Wed 4/88:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Deal found 3/12![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/108:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Deal found 3/12![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 3/10. 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 5/98:12 pm
STL
- SAT
1 stop18h 07m
Frontier
Deal found 3/10![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/118:16 pm
STL
- SAT
1 stop28h 03m
Frontier
Deal found 3/12![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 3/9. 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.
Sun 5/109:55 pm
STL
- SAT
1 stop13h 45m
Frontier
Deal found 3/9![Frontier logo]()
$107
This Southwest deal was found by Cheapflights users on 3/8. 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.
Sat 5/306:10 am
STL
- SAT
1 stop5h 35m
Southwest
Deal found 3/8![Southwest logo]()
$108
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 March 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Expedia) |
One-way from | $86 (Frontier) |
Popular in | November |
Cheapest in | May |
Average price | $367 |
Good round-trip deal | $436 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 March 13, 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
Tue 7/14
7:20 am-1:46 pm
1 stop6h 26m
San Antonio
Tue 7/21
6:45 am-12:54 pm
1 stop6h 09m
$271
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 6/18
9:23 am-4:03 pm
1 stop6h 40m
San Antonio
Mon 6/29
6:40 am-12:11 pm
1 stop5h 31m
$275
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 4/8
6:00 am-10:50 am
1 stop4h 50m
San Antonio
Thu 4/9
4:17 pm-10:28 pm
1 stop6h 11m
$290
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sun 4/19
6:50 pm-12:46 am
1 stop5h 56m
San Antonio
Wed 4/22
6:20 am-11:56 am
1 stop5h 36m
$291
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sun 4/19
5:35 am-12:05 pm
1 stop6h 30m
San Antonio
Wed 4/22
6:30 am-12:50 pm
2 stops6h 20m
$310
Quickest round-trip
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 5/21
5:40 am-11:25 am
1 stop5h 45m
San Antonio
Tue 5/26
3:50 pm-6:00 pm
Nonstop2h 10m
$315
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Fri 5/22
5:40 am-11:25 am
1 stop5h 45m
San Antonio
Tue 5/26
7:25 am-9:35 am
Nonstop2h 10m
$339
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 3/30
5:45 am-10:40 am
1 stop4h 55m
San Antonio
Wed 4/1
5:45 am-12:10 pm
2 stops6h 25m
$345
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 7/14
8:35 am-3:39 pm
1 stop7h 04m
San Antonio
Tue 7/21
5:30 am-3:46 pm
2 stops10h 16m
$350
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 4/7
9:10 am-7:48 pm
2 stops10h 38m
San Antonio
Sat 4/11
6:02 pm-10:28 pm
1 stop4h 26m
$350
Showing 1-10 of 22 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 March.
| 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?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to San Antonio. Price data was last updated on March 6, 2026.
Booking 90 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, May is the cheapest month in which you can book a flight from St. Louis to San Antonio (average of $118). Flying from St. Louis to San Antonio in March is currently the most expensive (average of $223). 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 March 13, 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 afternoon, which can drop the price by up to 15% versus a flight in the evening.
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 March 13, 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.
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
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
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
San Antonio flight routes
Alternative routes for St. Louis to San Antonio
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Antonio by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to San Antonio by cabin class
Find flights from St. Louis to San Antonio, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and San Antonio flights
Browse other St. Louis and San Antonio flight options. Last updated on March 13, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on March 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Antonio
Explore flights to San Antonio departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 13, 2026.
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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$248 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$190 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$192 | Average$278 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$198 | Average$288 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$217 | Average$386 | FlexibilityNo cancel fee | On-time63% |