Cheap flights from Saint Louis to San Antonio
from 133 US$
Compare hundreds of airlines Saint Louis–San Antonio
The cheapest month is usually 2026-09 · 133 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from Saint Louis to San Antonio, a about 1,276 km route (around 2h 6m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as Southwest Airlines operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Saint Louis to San Antonio?
It's usually 2026-09, from 133 USD. Use the price calendar to compare other dates.
How long is the flight from Saint Louis to San Antonio?
A nonstop flight takes about 2h 6m and covers around 1,276 km. Connecting itineraries take longer.
Are there direct flights from Saint Louis to San Antonio?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Saint Louis to San Antonio?
Southwest Airlines operate this route, among others. Compare them all in the results.
When should I book Saint Louis–San Antonio flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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Saint Louis → San Antonio · Live fares from 100+ sites — free, with no hidden fees.