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Home / St Louis — San Antonio

Cheap flights St Louis — San Antonio

St Louis (STL, US) San Antonio (SAT, US)
from $133 1 276 km ~2h 4 flights found 2 airlines cheapest on Friday
Reverse route
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
Choose your departure date
Cheapest: $133 on 11.12.2026
Prices shown are from searches by other travellers over the last 24 hours. Missing a date? Click any day — we'll find tickets anyway.
November 2026
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December 2026
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January 2027
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Prices found for 4 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Cheapest flights found
11 Dec 2026, Fri
Frontier Airlines F9 2636
03:20
STL Lambert-St. Louis International Airport
09:07
SAT San Antonio International Airport
5h 47m 1 stop
Farera
$133
View this ticket
10 Dec 2026, Thu
Southwest Airlines WN 4198
17:25
STL Lambert-St. Louis International Airport
19:40
SAT San Antonio International Airport
2h 15m Direct
Skytripfare
$174
View this ticket
01 Dec 2026, Tue
Frontier Airlines F9 2636
03:05
STL Lambert-St. Louis International Airport
12:21
SAT San Antonio International Airport
9h 16m 2 stops
Flightnetwork
$250
View this ticket
01 Dec 2026, Tue
Southwest Airlines WN 4793
07:15
STL Lambert-St. Louis International Airport
09:40
SAT San Antonio International Airport
2h 25m Direct
Skytripfare
$295
View this ticket
Route characteristics
Distance
1 276 km
Flight time
2h
Time difference
+0h
Minimum price
from $133 (11.12.2026)
Average price
$202
Maximum price
$250
Cheapest day
Friday
Departure airports (1)
STL Lambert-St. Louis International Airport
Arrival airports (1)
SAT San Antonio International Airport
Airlines (2)
F9 Frontier Airlines WN Southwest Airlines
Agencies (3)
Farera Skytripfare Flightnetwork
Prices by day of week
Tuesday
$250
avg $273
Thursday
$174
avg $174
Friday
$133
avg $133
Cheapest
Airlines — cheapest prices 2
Frontier Airlines
Frontier Airlines
Low-cost 2 flights · 2 days
$133
Southwest Airlines
Southwest Airlines
Low-cost 2 flights · 2 days
$174
Where to buy tickets 3
Farera
1 tickets · 1 days
from $133
Skytripfare
2 tickets · 2 days
from $174
Flightnetwork
1 tickets · 1 days
from $250
Airports

From — St Louis (1)

  • STL Lambert-St. Louis International Airport

To — San Antonio (1)

  • SAT San Antonio International Airport
Other destinations from St Louis
Burlington
US
Decatur
US
Jonesboro
US
Cape Girardeau
US
Kirksville
US
Marion
US
Owensboro
US
Fort Leonard Wood
US
Quincy
US
Dallas
US · Hub
Los Angeles
US · Hub
Miami
US · Hub
Frequently asked questions about the route St Louis — San Antonio
How long is the flight from St Louis to San Antonio?
Approximate flight time — 2h. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from St Louis to San Antonio?
The straight-line distance — 1 276 km.
How much do flights from St Louis to San Antonio cost?
The minimum price over 3 months — from $133 on 11.12.2026.
What is the average ticket price?
The average price — $202. Range: $133 — $250.
What is the time difference between St Louis and San Antonio?
The difference — +0h.
From which airports does St Louis operate flights?
From St Louis: STL (Lambert-St. Louis International Airport).
To which airports in San Antonio do flights arrive?
To San Antonio: SAT (San Antonio International Airport).
Which airlines fly this route?
This route is served by 2 airlines: Frontier Airlines, Southwest Airlines.
Are there direct flights?
Yes, there are direct flights. Minimum direct price — from $174. Total direct flights found: 2.
Which day of the week is cheapest?
The cheapest day of the week — Friday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route St Louis — San Antonio

Flights St Louis — San Antonio is a popular route. The straight-line distance is 1 276 km. Flight time 2h. Time difference +0h.

From St Louis (STL) flights depart from 1 airport: STL. To San Antonio (SAT) — 1 arrival airport: SAT.

2 airlines operate on this route: Frontier Airlines, Southwest Airlines.

The minimum price for the next 3 months — from $133 (11.12.2026). The cheapest dates are highlighted in the calendar above.

The average ticket price — $202, ranging from $133 to $250. Book 1–3 months in advance to get the best deals.

Cheapest day to fly — Friday.

Other destinations in United States from St Louis
Burlington
US
Decatur
US
Jonesboro
US
Cape Girardeau
US
Kirksville
US
Marion
US
Owensboro
US
Fort Leonard Wood
US

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