Southwest® flights from Harlingen/South Padre Island to Seattle/Tacoma from $159

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

$

Harlingen/South Padre Island (HRL)to

Seattle/Tacoma (SEA)
Depart: 01/10/2027

One-way

Basic

From
$159
Seen: 3 hrs ago

Harlingen/South Padre Island (HRL)to

Seattle/Tacoma (SEA)
Depart: 12/06/2026

One-way

Basic

From
$159
Seen: 19 hrs ago

Harlingen/South Padre Island (HRL)to

Seattle/Tacoma (SEA)
Depart: 12/06/2026

One-way

Choice

From
$213
Seen: 19 hrs ago

Harlingen/South Padre Island (HRL)to

Seattle/Tacoma (SEA)
Depart: 01/10/2027

One-way

Choice

From
$213
Seen: 3 hrs ago

Harlingen/South Padre Island (HRL)to

Seattle/Tacoma (SEA)
Depart: 12/02/2026

One-way

Basic

From
$215
Seen: 17 hrs ago

Harlingen/South Padre Island (HRL)to

Seattle/Tacoma (SEA)
Depart: 12/19/2026

One-way

Basic

From
$254
Seen: 9 hrs ago

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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.

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

Oct 2026
From$280*
Seen: 9 hrs ago
One Way/Basic
Nov 2026
From$255*
Seen: 12 hrs ago
One Way/Basic
Dec 2026
From$159*
Seen: 19 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $255
Displaying fares for October-2026
  • HRL–SEA: cmp-view-offers-disclaimer. Find Offers
    21

    Wed

    OCT

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    22

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    23

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    25

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    27

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    28

    Wed

  • HRL–SEA, 10/29/2026: From $280
    29

    Thu

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    30

    Fri

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    31

    Sat

  • HRL–SEA, 11/01/2026: From $305
    01

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    NOV

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    02

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    10

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    11

    Wed

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    12

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  • HRL–SEA, 11/13/2026: From $255
    13

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  • HRL–SEA, 11/14/2026: From $255
    14

    Sat

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    15

    Sun

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    16

    Mon

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    17

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    18

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    19

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    20

    Fri

    • Range$255-$305

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

    Questions we hear the most

    There are 35 weekly flights from Harlingen/South Padre Island to Seattle/Tacoma on Southwest Airlines.
    To find the lowest fares by day and time to fly Harlingen/South Padre Island to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
    You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
    Yes! Flights from Harlingen/South Padre Island to Seattle/Tacoma—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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