Southwest® flights from Ontario/LA to Long Island/Islip MacArthur from $171

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Low fares from Ontario/LA to Long Island/Islip MacArthur

$

Ontario/LA (ONT)to

Long Island/Islip MacArthur (ISP)
Depart: 12/02/2026

One-way

Basic

From
$171
Seen: 21 hrs ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$171
Seen: 5 hrs ago

Ontario/LA (ONT)to

Long Island/Islip MacArthur (ISP)
Depart: 12/04/2026

One-way

Basic

From
$174
Seen: 47 minutes ago

Ontario/LA (ONT)to

Long Island/Islip MacArthur (ISP)
Depart: 12/02/2026

One-way

Choice

From
$230
Seen: 21 hrs ago

Ontario/LA (ONT)to

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

One-way

Choice

From
$230
Seen: 5 hrs ago

Ontario/LA (ONT)to

Long Island/Islip MacArthur (ISP)
Depart: 12/04/2026

One-way

Choice

From
$259
Seen: 47 minutes ago

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Explore flights from Ontario/LA to Long Island/Islip MacArthur

Oct 2026
From$514*
Seen: 7 hrs ago
One Way/Basic
Nov 2026
From$324*
Seen: 19 hrs ago
One Way/Basic
Dec 2026
From$171*
Seen: 21 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $324
Displaying fares for October-2026
  • ONT–ISP, 10/22/2026: From $614
    22

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    OCT

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  • ONT–ISP, 10/24/2026: From $614
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  • ONT–ISP, 10/30/2026: From $514
    30

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  • ONT–ISP, 10/31/2026: From $514
    31

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    NOV

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  • ONT–ISP, 11/06/2026: From $324
    06

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  • ONT–ISP, 11/08/2026: From $324
    08

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    • Range$324-$614

    *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:
    LA/Ontario International Airport
    Arriving at:
    Long Island MacArthur Airport
    Distance:
    2464 miles

    Questions we hear the most

    There are 35 weekly flights from Ontario/LA to Long Island/Islip MacArthur on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA 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 Ontario/LA 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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