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Find low faresSouthwest® flights from Seattle/Tacoma to San Antonio from $99
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Low fares from Seattle/Tacoma to San Antonio
$
Seattle/Tacoma (SEA)to
San Antonio (SAT)
Depart: 03/03/2026
One-way
Basic
From
$99
Seen: 6 hrs ago
Seattle/Tacoma (SEA)to
San Antonio (SAT)
Depart: 02/28/2026
One-way
Basic
From
$108
Seen: 29 minutes ago
Seattle/Tacoma (SEA)to
San Antonio (SAT)
Depart: 03/11/2026
One-way
Basic
From
$119
Seen: 11 hrs ago
Seattle/Tacoma (SEA)to
San Antonio (SAT)
Depart: 03/10/2026
One-way
Basic
From
$119
Seen: 11 hrs ago
Seattle/Tacoma (SEA)to
San Antonio (SAT)
Depart: 03/09/2026
One-way
Basic
From
$129
Seen: 11 hrs ago
Seattle/Tacoma (SEA)to
San Antonio (SAT)
Depart: 02/27/2026
One-way
Basic
From
$130
Seen: 18 hrs ago
Explore flights from Seattle/Tacoma to San Antonio
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Flight Details
Departing from:
Seattle/Tacoma International Airport
Arriving at:
San Antonio International Airport
Distance:
1774 miles
Route Information
119† Weekly flights
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
There are 119 weekly flights from Seattle/Tacoma to San Antonio on Southwest Airlines.
To find the lowest fares by day and time to fly Seattle/Tacoma to San Antonio with Southwest, check out our Low Fare Calendar.
You can rent a car at San Antonio International Airport book yours with your flight.
Yes! Flights from Seattle/Tacoma to San Antonio—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.