$70+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SAT
May 25 — Jun 11
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 June, booked 90 days in advance, depart on a Tuesday or Saturday and return on a Wednesday
Cheap flight deals from St. Louis to San Antonio
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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 April 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 April 25, 2026.
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Mon 5/119:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Wed 5/138:59 pm
SAT
- STL
1 stop14h 42m
Frontier
Deal found 4/20![Frontier logo]()
$151
This Frontier deal was found by Cheapflights users on 4/21. 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 5/1412:36 pm
STL
- SAT
1 stop7h 38m
Frontier
Mon 5/188:59 pm
SAT
- STL
1 stop21h 07m
Frontier
Deal found 4/21![Frontier logo]()
$161
This CheapOair deal was found by Cheapflights users on 4/24. 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 5/89:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Fri 5/157:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/24![Frontier logo]()
$171
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Fri 5/229:06 pm
STL
- SAT
1 stop23h 08m
Frontier
Mon 5/258:59 pm
SAT
- STL
1 stop21h 07m
Frontier
Deal found 4/20![Frontier logo]()
$176
This Trip.com deal was found by Cheapflights users on 4/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:36 pm
STL
- SAT
1 stop7h 38m
Frontier
Sun 5/107:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/23![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 4/21. 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 5/89:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Mon 5/118:59 pm
SAT
- STL
1 stop21h 07m
Frontier
Deal found 4/21![Frontier logo]()
$191
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Sat 5/98:08 pm
STL
- SAT
1 stop22h 51m
Frontier
Sat 5/168:59 pm
SAT
- STL
1 stop14h 42m
Frontier
Deal found 4/24![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Tue 5/266:51 pm
STL
- SAT
1 stop25h 23m
Frontier
Fri 5/298:59 pm
SAT
- STL
1 stop20h 35m
Frontier
Deal found 4/21![Frontier logo]()
$196
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Mon 5/119:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Thu 5/147:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/20![Frontier logo]()
$216
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Tue 6/167:46 pm
STL
- SAT
1 stop24h 25m
Frontier
Sat 6/204:22 pm
SAT
- STL
1 stop7h 47m
Frontier
Deal found 4/21![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Mon 5/48:17 pm
STL
- SAT
1 stop22h 42m
Frontier
Fri 5/87:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/21![Frontier logo]()
$233
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Fri 7/108:21 pm
STL
- SAT
1 stop23h 50m
Frontier
Sun 7/127:51 pm
SAT
- STL
1 stop23h 32m
Frontier
Deal found 4/20![Frontier logo]()
$241
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 April 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 April 25, 2026.
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Tue 7/148:08 pm
STL
- SAT
1 stop22h 46m
Frontier
Tue 7/217:51 pm
SAT
- STL
1 stop23h 32m
Frontier
Deal found 4/24![Frontier logo]()
$241
This Southwest deal was found by Cheapflights users on 4/21. 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.
Tue 5/198:55 pm
STL
- SAT
Nonstop2h 20m
Southwest
Tue 5/265:05 pm
SAT
- STL
1 stop5h 15m
Southwest
Deal found 4/21![Southwest logo]()
$298
This United Airlines deal was found by Cheapflights users on 4/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:15 am
STL
- SAT
1 stop4h 23m
United Airlines
Tue 10/611:50 am
SAT
- STL
1 stop5h 11m
United Airlines
Deal found 4/22![United Airlines logo]()
$390
This Southwest deal was found by Cheapflights users on 4/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:20 pm
STL
- SAT
1 stop7h 25m
Southwest
Sat 8/227:25 am
SAT
- STL
Nonstop2h 05m
Southwest
Deal found 4/22![Southwest logo]()
$371
This Southwest deal was found by Cheapflights users on 4/20. 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.
Mon 5/117:50 pm
STL
- SAT
1 stop3h 40m
Southwest
Thu 5/147:20 am
SAT
- STL
Nonstop2h 10m
Southwest
Deal found 4/20![Southwest logo]()
$371
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/56:00 am
STL
- SAT
1 stop4h 47m
United Airlines
Wed 5/61:11 pm
SAT
- STL
1 stop7h 32m
United Airlines
Deal found 4/20![United Airlines logo]()
$424
This United Airlines deal was found by Cheapflights users on 4/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 am
STL
- SAT
1 stop4h 47m
United Airlines
Sat 5/92:25 pm
SAT
- STL
2 stops8h 20m
United Airlines
Deal found 4/22![United Airlines logo]()
$430
This Southwest deal was found by Cheapflights users on 4/24. 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 5/219:45 pm
STL
- SAT
Nonstop2h 20m
Southwest
Mon 5/255:55 am
SAT
- STL
1 stop3h 40m
Southwest
Deal found 4/24![Southwest logo]()
$395
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 5/286:00 am
STL
- SAT
2 stops9h 39m
United Airlines
Sun 5/311:40 pm
SAT
- STL
1 stop5h 40m
United Airlines
Deal found 4/23![United Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 4/21. 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.
Mon 6/17:15 pm
STL
- SAT
1 stop3h 45m
Southwest
Mon 7/134:50 pm
SAT
- STL
Nonstop2h 10m
Southwest
Deal found 4/21![Southwest logo]()
$423
This Southwest deal was found by Cheapflights users on 4/20. 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.
Thu 5/215:00 am
STL
- SAT
1 stop7h 15m
Southwest
Thu 5/287:20 am
SAT
- STL
Nonstop2h 10m
Southwest
Deal found 4/20![Southwest logo]()
$425
This Southwest deal was found by Cheapflights users on 4/24. 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.
Tue 8/48:45 pm
STL
- SAT
Nonstop2h 10m
Southwest
Sun 8/96:50 am
SAT
- STL
Nonstop2h 05m
Southwest
Deal found 4/24![Southwest logo]()
$439
Last-minute flights from St. Louis to San AntonioDiscover last-minute flight deals from St. Louis to San Antonio. Data last updated April 25, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to San Antonio. Data last updated April 25, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Mon 5/48:17 pm
STL
- SAT
1 stop22h 42m
Frontier
Fri 5/87:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/21![Frontier logo]()
$233
This Trip.com deal was found by Cheapflights users on 4/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:36 pm
STL
- SAT
1 stop7h 38m
Frontier
Sun 5/107:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/23![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 4/24. 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 5/89:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Fri 5/157:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/24![Frontier logo]()
$171
This CheapOair deal was found by Cheapflights users on 4/21. 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 5/89:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Mon 5/118:59 pm
SAT
- STL
1 stop21h 07m
Frontier
Deal found 4/21![Frontier logo]()
$191
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Sat 5/98:08 pm
STL
- SAT
1 stop22h 51m
Frontier
Sat 5/168:59 pm
SAT
- STL
1 stop14h 42m
Frontier
Deal found 4/24![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Mon 5/119:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Wed 5/138:59 pm
SAT
- STL
1 stop14h 42m
Frontier
Deal found 4/20![Frontier logo]()
$151
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Mon 5/119:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Thu 5/147:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/20![Frontier logo]()
$216
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Tue 5/126:51 pm
STL
- SAT
1 stop25h 23m
Frontier
Tue 5/267:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/20![Frontier logo]()
$176
This Frontier deal was found by Cheapflights users on 4/21. 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 5/1412:36 pm
STL
- SAT
1 stop7h 38m
Frontier
Mon 5/188:59 pm
SAT
- STL
1 stop21h 07m
Frontier
Deal found 4/21![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:51 pm
STL
- SAT
2 stops24h 08m
Frontier
Tue 5/267:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/21![Frontier logo]()
$265
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Tue 5/266:51 pm
STL
- SAT
1 stop25h 23m
Frontier
Fri 5/298:59 pm
SAT
- STL
1 stop20h 35m
Frontier
Deal found 4/21![Frontier logo]()
$196
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Wed 5/278:08 pm
STL
- SAT
1 stop22h 51m
Frontier
Sat 5/307:54 pm
SAT
- STL
1 stop23h 29m
Frontier
Deal found 4/24![Frontier logo]()
$257
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 April 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 April 25, 2026.
This Priceline deal was found by Cheapflights users on 4/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:36 pm
STL
- SAT
1 stop7h 38m
Frontier
Deal found 4/21![Frontier logo]()
$70
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Tue 5/196:51 pm
STL
- SAT
1 stop25h 23m
Frontier
Deal found 4/20![Frontier logo]()
$82
This Trip.com deal was found by Cheapflights users on 4/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/89:18 pm
STL
- SAT
1 stop22h 56m
Frontier
Deal found 4/22![Frontier logo]()
$99
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Sat 5/308:08 pm
STL
- SAT
1 stop22h 51m
Frontier
Deal found 4/24![Frontier logo]()
$102
This CheapOair deal was found by Cheapflights users on 4/24. 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.
Tue 6/238:08 pm
STL
- SAT
1 stop22h 48m
Frontier
Deal found 4/24![Frontier logo]()
$107
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:33 pm
STL
- SAT
2 stops27h 26m
Frontier
Deal found 4/21![Frontier logo]()
$122
This CheapOair deal was found by Cheapflights users on 4/22. 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 4/309:55 pm
STL
- SAT
1 stop21h 34m
Frontier
Deal found 4/22![Frontier logo]()
$123
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Fri 6/192:56 pm
STL
- SAT
1 stop29h 15m
Frontier
Deal found 4/20![Frontier logo]()
$127
This Delta deal was found by Cheapflights users on 4/21. 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.
Tue 5/193:11 pm
STL
- SAT
1 stop6h 21m
Delta
Deal found 4/21![Delta logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:19 pm
STL
- SAT
2 stops26h 40m
Frontier
Deal found 4/21![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 April 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $151 (CheapOair) |
One-way from | $70 (Priceline) |
Popular in | November |
Cheapest in | September |
Average price | $395 |
Good round-trip deal | $351 or less |
Good one-way deal | $274 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 April 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
Tue 7/14
8:08 pm-6:54 pm
1 stop22h 46m
San Antonio
Tue 7/21
7:51 pm-7:23 pm
1 stop23h 32m
$241
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 5/19
8:55 pm-11:15 pm
Nonstop2h 20m
San Antonio
Tue 5/26
5:05 pm-10:20 pm
1 stop5h 15m
$298
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Sat 8/15
12:20 pm-7:45 pm
1 stop7h 25m
San Antonio
Sat 8/22
7:25 am-9:30 am
Nonstop2h 05m
$371
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 5/11
7:50 pm-11:30 pm
1 stop3h 40m
San Antonio
Thu 5/14
7:20 am-9:30 am
Nonstop2h 10m
$371
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 10/5
6:15 am-10:38 am
1 stop4h 23m
San Antonio
Tue 10/6
11:50 am-5:01 pm
1 stop5h 11m
$390
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 5/21
9:45 pm-12:05 am
Nonstop2h 20m
San Antonio
Mon 5/25
5:55 am-9:35 am
1 stop3h 40m
$395
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Mon 6/1
7:15 pm-11:00 pm
1 stop3h 45m
San Antonio
Mon 7/13
4:50 pm-7:00 pm
Nonstop2h 10m
$423
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Tue 5/5
6:00 am-10:47 am
1 stop4h 47m
San Antonio
Wed 5/6
1:11 pm-8:43 pm
1 stop7h 32m
$424
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Thu 5/21
5:00 am-12:15 pm
1 stop7h 15m
San Antonio
Thu 5/28
7:20 am-9:30 am
Nonstop2h 10m
$425
St. LouisSan Antonio
STL - SAT
STLSAT
Lambert-St Louis
Wed 5/6
6:00 am-10:47 am
1 stop4h 47m
San Antonio
Sat 5/9
2:25 pm-10:45 pm
2 stops8h 20m
$430
Showing 1-10 of 23 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 April.
| 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 November is currently the most expensive (average of $417). 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 April 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 afternoon, which can drop the price by up to 49% 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 April 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.
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
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 April 25, 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 April 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 April 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$111 | Average$248 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$198 | Average$310 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$199 | Average$322 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$268 | Average$378 | FlexibilityNo cancel fee | On-time63% |