$99+ Cheap flights from St. Louis to San Antonio (STL - SAT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
Nov 21 — Nov 281
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 January or February, booked 90 days in advance, depart on a Saturday or Wednesday and return on a Wednesday
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 October 22, 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 October 22, 2026.
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:18 pm -
1 stop5h 15m
Fri 11/275:30 am -
1 stop7h 53m
Deal found 10/21![Delta logo]()
$197
This Delta deal was found by Cheapflights users on 10/20. 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 12/82:33 pm -
1 stop7h 46m
Sat 12/125:16 am -
1 stop6h 13m
Deal found 10/20![Delta logo]()
$217
This CheapOair deal was found by Cheapflights users on 10/20. 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 11/147:59 pm -
1 stop23h 26m
Tue 11/178:20 pm -
1 stop19h 03m
Deal found 10/20![Frontier logo]()
$218
This CheapOair deal was found by Cheapflights users on 10/17. 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 11/114:18 pm -
1 stop27h 07m
Tue 11/178:20 pm -
1 stop19h 03m
Deal found 10/17![Frontier logo]()
$230
This CheapOair deal was found by Cheapflights users on 10/20. 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 11/44:18 pm -
1 stop27h 07m
Mon 11/95:13 pm -
1 stop6h 03m
Deal found 10/20![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 10/20. 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 10/231:30 pm -
1 stop8h 19m
Sun 10/2510:34 pm -
1 stop14h 01m
Deal found 10/20![Frontier logo]()
$246
This Expedia deal was found by Cheapflights users on 10/20. 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.
Mon 11/97:59 pm -
1 stop23h 26m
Fri 11/138:11 pm -
1 stop23h 03m
Deal found 10/20![Frontier logo]()
$249
This CheapOair deal was found by Cheapflights users on 10/20. 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 10/317:59 pm -
1 stop24h 26m
Wed 11/410:29 pm -
1 stop14h 04m
Deal found 10/20![Frontier logo]()
$253
This CheapOair deal was found by Cheapflights users on 10/20. 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 10/224:30 pm -
1 stop16h 38m
Mon 10/2610:03 am -
1 stop13h 10m
Deal found 10/20![Frontier logo]()
$256
This Frontier deal was found by Cheapflights users on 10/18. 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 11/1911:40 am -
1 stop7h 45m
Wed 11/2512:06 pm -
1 stop11h 53m
Deal found 10/18![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 10/20. 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 11/1911:40 am -
1 stop7h 45m
Sun 11/228:28 pm -
1 stop14h 35m
Deal found 10/20![Frontier logo]()
$267
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 October 22, 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 October 22, 2026.
This United Airlines deal was found by Cheapflights users on 10/20. 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 12/83:00 pm -
1 stop4h 20m
Sat 12/125:45 pm -
1 stop4h 45m
Deal found 10/20![United Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 10/21. 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.
Sun 12/2010:15 pm -
Nonstop2h 25m
Tue 12/294:40 pm -
1 stop4h 20m
Deal found 10/21![Southwest logo]()
$303
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/207:18 pm -
1 stop5h 15m
Tue 11/244:32 pm -
1 stop7h 24m
Deal found 10/21![Delta logo]()
$316
This Southwest deal was found by Cheapflights users on 10/21. 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 11/2510:15 pm -
Nonstop2h 25m
Fri 11/278:25 pm -
1 stop4h 10m
Deal found 10/21![Southwest logo]()
$309
This Southwest deal was found by Cheapflights users on 10/20. 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.
Tue 11/2410:15 pm -
Nonstop2h 25m
Fri 11/278:25 pm -
1 stop4h 10m
Deal found 10/20![Southwest logo]()
$309
This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:15 am -
1 stop4h 31m
Tue 11/108:56 am -
1 stop8h 01m
Deal found 10/21![United Airlines logo]()
$412
This Southwest deal was found by Cheapflights users on 10/18. 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 11/69:50 pm -
Nonstop2h 20m
Mon 11/97:30 am -
Nonstop2h 05m
Deal found 10/18![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 10/21. 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 11/48:25 pm -
Nonstop2h 20m
Sat 11/74:00 pm -
1 stop4h 05m
Deal found 10/21![Southwest logo]()
$427
Last-minute flights from St. Louis to San AntonioDiscover last-minute flight deals from St. Louis to San Antonio. Data last updated October 22, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to San Antonio. Data last updated October 22, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 10/20. 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 10/224:30 pm -
1 stop16h 38m
Mon 10/2610:03 am -
1 stop13h 10m
Deal found 10/20![Frontier logo]()
$256
This Frontier deal was found by Cheapflights users on 10/20. 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 10/231:30 pm -
1 stop8h 19m
Sun 10/2510:34 pm -
1 stop14h 01m
Deal found 10/20![Frontier logo]()
$246
This CheapOair deal was found by Cheapflights users on 10/20. 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 10/317:59 pm -
1 stop24h 26m
Wed 11/410:29 pm -
1 stop14h 04m
Deal found 10/20![Frontier logo]()
$253
This CheapOair deal was found by Cheapflights users on 10/20. 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 11/44:18 pm -
1 stop27h 07m
Mon 11/95:13 pm -
1 stop6h 03m
Deal found 10/20![Frontier logo]()
$244
This Expedia deal was found by Cheapflights users on 10/20. 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.
Mon 11/97:59 pm -
1 stop23h 26m
Fri 11/138:11 pm -
1 stop23h 03m
Deal found 10/20![Frontier logo]()
$249
This CheapOair deal was found by Cheapflights users on 10/17. 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 11/114:18 pm -
1 stop27h 07m
Tue 11/178:20 pm -
1 stop19h 03m
Deal found 10/17![Frontier logo]()
$230
This CheapOair deal was found by Cheapflights users on 10/20. 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 11/147:59 pm -
1 stop23h 26m
Tue 11/178:20 pm -
1 stop19h 03m
Deal found 10/20![Frontier logo]()
$218
This Frontier deal was found by Cheapflights users on 10/18. 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 11/1911:40 am -
1 stop7h 45m
Wed 11/2512:06 pm -
1 stop11h 53m
Deal found 10/18![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 10/20. 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 11/1911:40 am -
1 stop7h 45m
Sun 11/228:28 pm -
1 stop14h 35m
Deal found 10/20![Frontier logo]()
$267
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:18 pm -
1 stop5h 15m
Fri 11/275:30 am -
1 stop7h 53m
Deal found 10/21![Delta logo]()
$197
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 October 22, 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 October 22, 2026.
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/145:30 pm -
1 stop6h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$99
This Frontier deal was found by Cheapflights users on 10/21. 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 11/1911:40 am -
1 stop7h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$115
This CheapOair deal was found by Cheapflights users on 10/19. 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 11/184:18 pm -
1 stop27h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Frontier logo]()
$116
This Expedia deal was found by Cheapflights users on 10/20. 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.
Sun 11/154:26 pm -
1 stop23h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Frontier logo]()
$129
This CheapOair deal was found by Cheapflights users on 10/17. 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 12/57:54 pm -
1 stop24h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Frontier logo]()
$139
This Southwest deal was found by Cheapflights users on 10/19. 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 11/188:25 am -
Nonstop2h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$141
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:06 pm -
1 stop4h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$144
This CheapOair deal was found by Cheapflights users on 10/19. 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 12/117:54 pm -
1 stop22h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Frontier logo]()
$148
This Expedia deal was found by Cheapflights users on 10/19. 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.
Mon 11/97:59 pm -
1 stop23h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Frontier logo]()
$156
This CheapOair deal was found by Cheapflights users on 10/18. 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 11/265:15 pm -
1 stop28h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Frontier logo]()
$158
This Southwest deal was found by Cheapflights users on 10/19. 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 11/99:50 pm -
Nonstop2h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$159
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 October 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (Delta) |
One-way from | $99 (Delta) |
Popular in | August |
Cheapest in | January |
Average price | $382 |
Good round-trip deal | $377 or less |
Good one-way deal | $464 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 7,457,451 searches. Data last updated October 22, 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 Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Sat 12/5
12:36 pm-7:59 pm
1 stop7h 23m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Sat 11/14
5:00 am-1:16 pm
2 stops8h 16m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$149
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Thu 11/26
5:15 pm-9:16 pm
1 stop28h 01m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$158
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Fri 12/11
9:50 pm-12:10 am
Nonstop2h 20m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Mon 11/9
9:50 pm-12:10 am
Nonstop2h 20m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Sun 11/15
9:50 pm-12:10 am
Nonstop2h 20m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
Quickest round-trip
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Sat 11/14
8:40 am-10:55 am
Nonstop2h 15m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Thu 11/19
5:00 am-1:16 pm
2 stops8h 16m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$199
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Sat 12/5
5:15 am-3:48 pm
2 stops10h 33m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$199
St. LouisSan Antonio
STL Lambert-St Louis - SAT San Antonio
STLSAT
Lambert-St Louis
Mon 11/23
6:05 pm-9:16 pm
2 stops27h 11m
San Antonio
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$209
Showing 1-10 of 19 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 October.
| 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, January is the cheapest month in which you can book a flight from St. Louis to San Antonio (average of $309). 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 October 22, 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 37% 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 October 22, 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.
Overall
7.9
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
7.9
Boarding
8.1
Crew
8.6
Food
7.0
Entertainment
7.4
Comfort
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.
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Top 4 airlines flying from St. Louis to San Antonio
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$111 | Average$270 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$350 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$224 | Average$360 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$290 | Average$433 | FlexibilityNo cancel fee | On-time63% |