Southwest® flights from San Antonio to Portland, ME from $169

Promo Code

Low fares from San Antonio to Portland, ME

$

San Antonio (SAT)to

Portland, ME (PWM)
Depart: 04/15/2026

One-way

Basic

From
$169
Seen: 1 hour ago

San Antonio (SAT)to

Portland, ME (PWM)
Depart: 06/09/2026

One-way

Basic

From
$184
Seen: 17 hrs ago

San Antonio (SAT)to

Portland, ME (PWM)
Depart: 04/09/2026

One-way

Basic

From
$189
Seen: 20 hrs ago

San Antonio (SAT)to

Portland, ME (PWM)
Depart: 05/18/2026

One-way

Basic

From
$200
Seen: 18 hrs ago

San Antonio (SAT)to

Portland, ME (PWM)
Depart: 06/17/2026

One-way

Basic

From
$204
Seen: 19 hrs ago

San Antonio (SAT)to

Portland, ME (PWM)
Depart: 04/15/2026

One-way

Choice

From
$209
Seen: 1 hour ago

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Find low fares

Explore flights from San Antonio to Portland, ME

Mar 2026
From$459*
Seen: 20 hrs ago
One Way/Basic
Apr 2026
From$169*
Seen: 1 hour ago
One Way/Basic
May 2026
From$200*
Seen: 18 hrs ago
One Way/Basic
$189
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    • Range$189-$549

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    San Antonio International Airport
    Arriving at:
    Portland International Jetport
    Distance:
    1830 miles

    Route Information

    61† 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 61 weekly flights from San Antonio to Portland, ME on Southwest Airlines.
    To find the lowest fares by day and time to fly San Antonio to Portland, ME with Southwest, check out our Low Fare Calendar.
    You can rent a car at Portland International Jetport book yours with your flight.
    Yes! Flights from San Antonio to Portland, ME—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.