Southwest® flights from Long Island/Islip MacArthur to Buffalo/Niagara Falls from $127

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Low fares from Long Island/Islip MacArthur to Buffalo/Niagara Falls

$

Long Island/Islip MacArthur (ISP)to

Buffalo/Niagara Falls (BUF)
Depart: 09/21/2026

One-way

Basic

From
$127
Seen: 2 hrs ago

Long Island/Islip MacArthur (ISP)to

Buffalo/Niagara Falls (BUF)
Depart: 11/07/2026

One-way

Basic

From
$138
Seen: 15 hrs ago

Long Island/Islip MacArthur (ISP)to

Buffalo/Niagara Falls (BUF)
Depart: 11/26/2026

One-way

Basic

From
$154
Seen: 7 hrs ago

Long Island/Islip MacArthur (ISP)to

Buffalo/Niagara Falls (BUF)
Depart: 09/15/2026

One-way

Basic

From
$154
Seen: 13 hrs ago

Long Island/Islip MacArthur (ISP)to

Buffalo/Niagara Falls (BUF)
Depart: 09/21/2026

One-way

Choice

From
$162
Seen: 2 hrs ago

Long Island/Islip MacArthur (ISP)to

Buffalo/Niagara Falls (BUF)
Depart: 09/17/2026

One-way

Basic

From
$166
Seen: 22 hrs ago

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Explore flights from Long Island/Islip MacArthur to Buffalo/Niagara Falls

Aug 2026
From$290*
Seen: 10 hrs ago
One Way/Basic
Sep 2026
From$127*
Seen: 2 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 22 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $127
cmp-daily-histogram-bars-legend-max-price-aria-label $372
Displaying fares for August-2026
  • ISP–BUF, 08/22/2026: From $372
    22

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    AUG

  • ISP–BUF, 08/23/2026: From $372
    23

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  • ISP–BUF, 08/27/2026: From $290
    27

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  • ISP–BUF, 08/28/2026: From $290
    28

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  • ISP–BUF, 08/29/2026: From $290
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  • ISP–BUF, 08/31/2026: From $290
    31

    Mon

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    SEP

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    06

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  • ISP–BUF, 09/08/2026: From $194
    08

    Tue

  • ISP–BUF, 09/09/2026: From $176
    09

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    10

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    11

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    12

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    13

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    14

    Mon

  • ISP–BUF, 09/15/2026: From $154
    15

    Tue

  • ISP–BUF, 09/16/2026: From $224
    16

    Wed

  • ISP–BUF, 09/17/2026: From $166
    17

    Thu

  • ISP–BUF, 09/18/2026: From $199
    18

    Fri

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    19

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    20

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  • ISP–BUF, 09/21/2026: From $127
    21

    Mon

    • Range$127-$372

    *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:
    Long Island MacArthur Airport
    Arriving at:
    Buffalo Niagara International Airport
    Distance:
    326 miles

    Route Information

    71† 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 71 weekly flights from Long Island/Islip MacArthur to Buffalo/Niagara Falls on Southwest Airlines.
    To find the lowest fares by day and time to fly Long Island/Islip MacArthur to Buffalo/Niagara Falls with Southwest, check out our Low Fare Calendar.
    You can rent a car at Buffalo Niagara International Airport book yours with your flight.
    Yes! Flights from Long Island/Islip MacArthur to Buffalo/Niagara Falls—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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