Cheap flights from Austin to San Antonio from $270 AUS → SAT
Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT)
The cheapest one-way found recently is $270 with Southwest Airlines, 22 Mar 2027, found 2 days ago.
- Cheapest one-way found recently
- $270, found 2 days ago
- Cheapest month to fly
- December 2026, one-way fares from $109 found in the last 7 days
One-way
The cheapest one-way fare on each of 12 departure dates is usually $223 to $255.
Cheapest one-way found recently
$270
22 Mar 2027 · Southwest Airlines
Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT)
Leaves 1:10 p.m. · 4 h 5 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$270 22 Mar 2027found 2 days agoOpen this trip
$109 8 Decfound 4 days agoOpen this trip
What have prices looked like?
Over 4 days, 8 Nov to 11 Nov, the cheapest one-way we saw each day was $109 to $373.
4 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 12 departure dates from 7 Dec to 28 Mar 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
Yes. Among one-way fares leaving within 3 days of 22 Mar 2027, 23 Mar 2027 costs $223: $47 less than the cheapest found recently.
Southwest Airlines · Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) · 1 stop · found 4 days ago
Every date we hold
12 fares on 12 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 7 Dec | $185 | Frontier Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 2 stops | found 4 days ago | Open this trip |
| 8 Dec | $109 | Frontier Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 13 Dec | $223 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 25 Dec | $236 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 27 Dec | $268 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 22 Mar 2027 | $270 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 2 days ago | Open this trip |
| 23 Mar 2027 | $223 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 24 Mar 2027 | $223 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 25 Mar 2027 | $255 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 26 Mar 2027 | $255 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 27 Mar 2027 | $255 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
| 28 Mar 2027 | $255 | Southwest Airlines | Austin-Bergstrom International Airport (AUS) → San Antonio International Airport (SAT) | 1 stop | found 4 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $109.
Airlines on the cheapest dates: Southwest Airlines, Frontier Airlines.
Premium cabin fares from Austin to San Antonio
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 22 Mar 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Austin to San Antonio?
One-way
Not enough history yet: we have 4 days of one-way prices, 8 Nov to 11 Nov, and compare booking times once 3 booking ranges have 7 days each.
Live price for these dates
The cheapest one-way found recently is for 22 Mar 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from Austin to San Antonio?
The cheapest one-way found recently is $270 with Southwest Airlines, 22 Mar 2027, found 2 days ago. The cheapest one-way we hold, of any age, is $109 with Frontier Airlines, 8 Dec, found 4 days ago. The cheapest one-way fare on each of 12 departure dates is usually $223 to $255.
What is the cheapest month to fly from Austin to San Antonio?
December 2026 is the cheapest month for a one-way, from $109, 8 Dec, found 4 days ago.
How long is the flight from Austin to San Antonio?
The cheapest one-way found recently, with Southwest Airlines on 22 Mar 2027, takes 4 h 5 min with 1 stop.
Which airlines have the cheapest flights from Austin to San Antonio?
Between 7 Dec and 28 Mar 2027, Southwest Airlines has the cheapest one-way on 10 of the 12 departure dates we hold, and Frontier Airlines on 2.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work