Southwest® flights from St. Louis to Long Island/Islip MacArthur from $119

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Low fares from St. Louis to Long Island/Islip MacArthur

$

St. Louis (STL)to

Long Island/Islip MacArthur (ISP)
Depart: 01/05/2027

One-way

Basic

From
$119
Seen: 21 hrs ago

St. Louis (STL)to

Long Island/Islip MacArthur (ISP)
Depart: 12/06/2026

One-way

Basic

From
$121
Seen: 2 hrs ago

St. Louis (STL)to

Long Island/Islip MacArthur (ISP)
Depart: 11/13/2026

One-way

Basic

From
$121
Seen: 1 hour ago

St. Louis (STL)to

Long Island/Islip MacArthur (ISP)
Depart: 11/11/2026

One-way

Basic

From
$121
Seen: 2 hrs ago

St. Louis (STL)to

Long Island/Islip MacArthur (ISP)
Depart: 12/24/2026

One-way

Basic

From
$125
Seen: 2 hrs ago

St. Louis (STL)to

Long Island/Islip MacArthur (ISP)
Depart: 11/14/2026

One-way

Basic

From
$126
Seen: 10 hrs ago

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Explore flights from St. Louis to Long Island/Islip MacArthur

Oct 2026
From$365*
Seen: 13 hrs ago
One Way/Basic
Nov 2026
From$121*
Seen: 2 hrs ago
One Way/Basic
Dec 2026
From$121*
Seen: 2 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $121
cmp-daily-histogram-bars-legend-max-price-aria-label $493
Displaying fares for October-2026
  • STL–ISP, 10/22/2026: From $493
    22

    Thu

    OCT

  • STL–ISP, 10/23/2026: From $493
    23

    Fri

  • STL–ISP, 10/24/2026: From $493
    24

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    25

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    26

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    27

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    28

    Wed

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    29

    Thu

  • STL–ISP, 10/30/2026: From $365
    30

    Fri

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

    Sat

  • STL–ISP, 11/01/2026: From $365
    01

    Sun

    NOV

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    02

    Mon

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    03

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    04

    Wed

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    05

    Thu

  • STL–ISP, 11/06/2026: From $231
    06

    Fri

  • STL–ISP: cmp-view-offers-disclaimer. Find Offers
    07

    Sat

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

    Sun

  • STL–ISP, 11/09/2026: From $231
    09

    Mon

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

    Tue

  • STL–ISP, 11/11/2026: From $121
    11

    Wed

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

    Thu

  • STL–ISP, 11/13/2026: From $121
    13

    Fri

  • STL–ISP, 11/14/2026: From $126
    14

    Sat

  • STL–ISP: cmp-view-offers-disclaimer. Find Offers
    15

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  • STL–ISP: cmp-view-offers-disclaimer. Find Offers
    16

    Mon

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    17

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

    Wed

  • STL–ISP, 11/19/2026: From $224
    19

    Thu

  • STL–ISP, 11/20/2026: From $304
    20

    Fri

  • STL–ISP: cmp-view-offers-disclaimer. Find Offers
    21

    Sat

    • Range$121-$493

    *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:
    Long Island MacArthur Airport
    Distance:
    929 miles

    Questions we hear the most

    There are 78 weekly flights from St. Louis to Long Island/Islip MacArthur on Southwest Airlines.
    To find the lowest fares by day and time to fly St. Louis to Long Island/Islip MacArthur with Southwest, check out our Low Fare Calendar.
    You can rent a car at Long Island MacArthur Airport book yours with your flight.
    Yes! Flights from St. Louis to Long Island/Islip MacArthur—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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