Southwest® flights from St. Louis to Harlingen/South Padre Island from $102

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Low fares from St. Louis to Harlingen/South Padre Island

$

St. Louis (STL)to

Harlingen/South Padre Island (HRL)
Depart: 12/31/2026

One-way

Basic

From
$102
Seen: 15 hrs ago

St. Louis (STL)to

Harlingen/South Padre Island (HRL)
Depart: 01/21/2027

One-way

Basic

From
$102
Seen: 3 hrs ago

St. Louis (STL)to

Harlingen/South Padre Island (HRL)
Depart: 12/02/2026

One-way

Basic

From
$102
Seen: 4 hrs ago

St. Louis (STL)to

Harlingen/South Padre Island (HRL)
Depart: 11/14/2026

One-way

Basic

From
$102
Seen: 3 hrs ago

St. Louis (STL)to

Harlingen/South Padre Island (HRL)
Depart: 12/14/2026

One-way

Basic

From
$102
Seen: 11 hrs ago

St. Louis (STL)to

Harlingen/South Padre Island (HRL)
Depart: 11/11/2026

One-way

Basic

From
$107
Seen: 6 hrs ago

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Explore flights from St. Louis to Harlingen/South Padre Island

Oct 2026
From$237*
Seen: 1 hour ago
One Way/Basic
Nov 2026
From$102*
Seen: 3 hrs ago
One Way/Basic
Dec 2026
From$102*
Seen: 11 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $102
cmp-daily-histogram-bars-legend-max-price-aria-label $295
Displaying fares for October-2026
  • STL–HRL, 10/21/2026: From $237
    21

    Wed

    OCT

  • STL–HRL, 10/22/2026: From $260
    22

    Thu

  • STL–HRL, 10/23/2026: From $295
    23

    Fri

  • STL–HRL, 10/24/2026: From $237
    24

    Sat

  • STL–HRL, 10/25/2026: From $265
    25

    Sun

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    26

    Mon

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    27

    Tue

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    28

    Wed

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    29

    Thu

  • STL–HRL, 10/30/2026: From $245
    30

    Fri

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    01

    Sun

    NOV

  • STL–HRL, 11/02/2026: From $245
    02

    Mon

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    03

    Tue

  • STL–HRL, 11/04/2026: From $200
    04

    Wed

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    05

    Thu

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    06

    Fri

  • STL–HRL, 11/07/2026: From $200
    07

    Sat

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    08

    Sun

  • STL–HRL, 11/09/2026: From $200
    09

    Mon

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    10

    Tue

  • STL–HRL, 11/11/2026: From $107
    11

    Wed

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    12

    Thu

  • STL–HRL, 11/13/2026: From $127
    13

    Fri

  • STL–HRL, 11/14/2026: From $102
    14

    Sat

  • STL–HRL, 11/15/2026: From $140
    15

    Sun

  • STL–HRL, 11/16/2026: From $200
    16

    Mon

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    17

    Tue

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    18

    Wed

  • STL–HRL: cmp-view-offers-disclaimer. Find Offers
    19

    Thu

  • STL–HRL, 11/20/2026: From $240
    20

    Fri

    • Range$102-$295

    *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:
    Lambert-St Louis Int'l Airport
    Arriving at:
    Valley International Airport
    Distance:
    961 miles

    Questions we hear the most

    There are 95 weekly flights from St. Louis to Harlingen/South Padre Island on Southwest Airlines.
    To find the lowest fares by day and time to fly St. Louis 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 St. Louis 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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