Alaska Airlines Flights from Seattle to San Antonio

Flexpay logo

Book now. Pay later.

Spread the cost of your flight over low monthly payments.

Lowest fares from Seattle to San Antonio

One-way low-fare flights Seattle to San Antonio.*

$
keyboard_arrow_down
One-way low-fare flights Seattle to San Antonio.*
From
To
Fare Type
Dates
Price
Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Oct 9, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Oct 17, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Oct 26, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Nov 7, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Nov 13, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Nov 17, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Dec 6, 2025

From

$139

Seen: 12 hours ago

Seattle (SEA)San Antonio (SAT)One-way
|
Saver
Depart: Jan 20, 2026

From

$139

Seen: 12 hours ago

*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.