Alaska Airlines Flights from Portland to San Antonio

Flexpay logo

Book now. Pay later.

Spread the cost of your flight over low monthly payments.

Lowest fares from Portland to San Antonio

$149
$485
Displaying fares for July-2025
  • 03

    Th

    JUL

  • 04

    Fr

  • 05

    Sa

  • 06

    Su

  • 07

    Mo

  • 08

    Tu

  • 09

    We

  • 10

    Th

  • 11

    Fr

  • 12

    Sa

  • 13

    Su

  • 14

    Mo

  • 15

    Tu

  • 16

    We

  • 17

    Th

  • 18

    Fr

  • 19

    Sa

  • 20

    Su

  • 21

    Mo

  • 22

    Tu

  • 23

    We

  • 24

    Th

  • 25

    Fr

  • 26

    Sa

  • 27

    Su

  • 28

    Mo

  • 29

    Tu

  • 30

    We

  • 31

    Th

  • 01

    Fr

    AUG

  • 02

    Sa

  • Range$149-$485

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

    keyboard_arrow_down
    sort
    keyboard_arrow_down
    One-way low-fare flights Portland to San Antonio.*
    From
    To
    Fare Type
    Dates
    Price
    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Dec 15, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Oct 31, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Nov 5, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Nov 10, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Oct 20, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Oct 30, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Nov 3, 2025

    From

    $143

    Seen: 23 minutes ago

    Portland (PDX)San Antonio (SAT)One-way
    |
    Saver
    Depart: Nov 6, 2025

    From

    $143

    Seen: 23 minutes 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.