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Southwest® flights from Seattle/Tacoma to Harlingen/South Padre Island from $185

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Low fares from Seattle/Tacoma to Harlingen/South Padre Island

$

Seattle/Tacoma (SEA)to

Harlingen/South Padre Island (HRL)
Depart: 06/17/2026

One-way

Basic

From
$185
Seen: 8 hrs ago

Seattle/Tacoma (SEA)to

Harlingen/South Padre Island (HRL)
Depart: 06/06/2026

One-way

Basic

From
$185
Seen: 10 hrs ago

Seattle/Tacoma (SEA)to

Harlingen/South Padre Island (HRL)
Depart: 08/16/2026

One-way

Basic

From
$206
Seen: 10 hrs ago

Seattle/Tacoma (SEA)to

Harlingen/South Padre Island (HRL)
Depart: 08/14/2026

One-way

Basic

From
$210
Seen: 10 hrs ago

Seattle/Tacoma (SEA)to

Harlingen/South Padre Island (HRL)
Depart: 06/23/2026

One-way

Basic

From
$215
Seen: 5 hrs ago

Seattle/Tacoma (SEA)to

Harlingen/South Padre Island (HRL)
Depart: 06/17/2026

One-way

Choice

From
$230
Seen: 8 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Seattle/Tacoma to Harlingen/South Padre Island

May 2026
From$245*
Seen: 20 hrs ago
One Way/Basic
Jun 2026
From$185*
Seen: 8 hrs ago
One Way/Basic
Jul 2026
No result for this month.
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    • Range$185-$320

    *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:
    Seattle/Tacoma International Airport
    Arriving at:
    Valley International Airport
    Distance:
    1985 miles

    Route Information

    30† 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 30 weekly flights from Seattle/Tacoma to Harlingen/South Padre Island on Southwest Airlines.
    To find the lowest fares by day and time to fly Seattle/Tacoma to Harlingen/South Padre Island with Southwest, check out our Low Fare Calendar.
    You can rent a car at Valley International Airport book yours with your flight.
    Yes! Flights from Seattle/Tacoma to Harlingen/South Padre Island—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.

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